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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (C) 2016 Namjae Jeon <linkinjeon@kernel.org>
4 * Copyright (C) 2018 Samsung Electronics Co., Ltd.
5 */
6
7#include <linux/slab.h>
8#include "glob.h"
9
10#include "auth.h"
11#include "connection.h"
12#include "smb_common.h"
13#include "server.h"
14
15static struct smb_version_values smb21_server_values = {
16 .version_string = SMB21_VERSION_STRING,
17 .protocol_id = SMB21_PROT_ID,
18 .capabilities = SMB2_GLOBAL_CAP_LARGE_MTU,
19 .max_read_size = SMB21_DEFAULT_IOSIZE,
20 .max_write_size = SMB21_DEFAULT_IOSIZE,
21 .max_trans_size = SMB21_DEFAULT_IOSIZE,
22 .max_credits = SMB2_MAX_CREDITS,
23 .large_lock_type = 0,
24 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
25 .shared_lock_type = SMB2_LOCKFLAG_SHARED,
26 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
27 .header_size = sizeof(struct smb2_hdr),
28 .max_header_size = MAX_SMB2_HDR_SIZE,
29 .read_rsp_size = sizeof(struct smb2_read_rsp),
30 .lock_cmd = SMB2_LOCK,
31 .cap_unix = 0,
32 .cap_nt_find = SMB2_NT_FIND,
33 .cap_large_files = SMB2_LARGE_FILES,
34 .create_lease_size = sizeof(struct create_lease),
35 .create_durable_size = sizeof(struct create_durable_rsp),
36 .create_mxac_size = sizeof(struct create_mxac_rsp),
37 .create_disk_id_size = sizeof(struct create_disk_id_rsp),
38 .create_posix_size = sizeof(struct create_posix_rsp),
39};
40
41static struct smb_version_values smb30_server_values = {
42 .version_string = SMB30_VERSION_STRING,
43 .protocol_id = SMB30_PROT_ID,
44 .capabilities = SMB2_GLOBAL_CAP_LARGE_MTU,
45 .max_read_size = SMB3_DEFAULT_IOSIZE,
46 .max_write_size = SMB3_DEFAULT_IOSIZE,
47 .max_trans_size = SMB3_DEFAULT_TRANS_SIZE,
48 .max_credits = SMB2_MAX_CREDITS,
49 .large_lock_type = 0,
50 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
51 .shared_lock_type = SMB2_LOCKFLAG_SHARED,
52 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
53 .header_size = sizeof(struct smb2_hdr),
54 .max_header_size = MAX_SMB2_HDR_SIZE,
55 .read_rsp_size = sizeof(struct smb2_read_rsp),
56 .lock_cmd = SMB2_LOCK,
57 .cap_unix = 0,
58 .cap_nt_find = SMB2_NT_FIND,
59 .cap_large_files = SMB2_LARGE_FILES,
60 .create_lease_size = sizeof(struct create_lease_v2),
61 .create_durable_size = sizeof(struct create_durable_rsp),
62 .create_durable_v2_size = sizeof(struct create_durable_v2_rsp),
63 .create_mxac_size = sizeof(struct create_mxac_rsp),
64 .create_disk_id_size = sizeof(struct create_disk_id_rsp),
65 .create_posix_size = sizeof(struct create_posix_rsp),
66};
67
68static struct smb_version_values smb302_server_values = {
69 .version_string = SMB302_VERSION_STRING,
70 .protocol_id = SMB302_PROT_ID,
71 .capabilities = SMB2_GLOBAL_CAP_LARGE_MTU,
72 .max_read_size = SMB3_DEFAULT_IOSIZE,
73 .max_write_size = SMB3_DEFAULT_IOSIZE,
74 .max_trans_size = SMB3_DEFAULT_TRANS_SIZE,
75 .max_credits = SMB2_MAX_CREDITS,
76 .large_lock_type = 0,
77 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
78 .shared_lock_type = SMB2_LOCKFLAG_SHARED,
79 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
80 .header_size = sizeof(struct smb2_hdr),
81 .max_header_size = MAX_SMB2_HDR_SIZE,
82 .read_rsp_size = sizeof(struct smb2_read_rsp),
83 .lock_cmd = SMB2_LOCK,
84 .cap_unix = 0,
85 .cap_nt_find = SMB2_NT_FIND,
86 .cap_large_files = SMB2_LARGE_FILES,
87 .create_lease_size = sizeof(struct create_lease_v2),
88 .create_durable_size = sizeof(struct create_durable_rsp),
89 .create_durable_v2_size = sizeof(struct create_durable_v2_rsp),
90 .create_mxac_size = sizeof(struct create_mxac_rsp),
91 .create_disk_id_size = sizeof(struct create_disk_id_rsp),
92 .create_posix_size = sizeof(struct create_posix_rsp),
93};
94
95static struct smb_version_values smb311_server_values = {
96 .version_string = SMB311_VERSION_STRING,
97 .protocol_id = SMB311_PROT_ID,
98 .capabilities = SMB2_GLOBAL_CAP_LARGE_MTU,
99 .max_read_size = SMB3_DEFAULT_IOSIZE,
100 .max_write_size = SMB3_DEFAULT_IOSIZE,
101 .max_trans_size = SMB3_DEFAULT_TRANS_SIZE,
102 .max_credits = SMB2_MAX_CREDITS,
103 .large_lock_type = 0,
104 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
105 .shared_lock_type = SMB2_LOCKFLAG_SHARED,
106 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
107 .header_size = sizeof(struct smb2_hdr),
108 .max_header_size = MAX_SMB2_HDR_SIZE,
109 .read_rsp_size = sizeof(struct smb2_read_rsp),
110 .lock_cmd = SMB2_LOCK,
111 .cap_unix = 0,
112 .cap_nt_find = SMB2_NT_FIND,
113 .cap_large_files = SMB2_LARGE_FILES,
114 .create_lease_size = sizeof(struct create_lease_v2),
115 .create_durable_size = sizeof(struct create_durable_rsp),
116 .create_durable_v2_size = sizeof(struct create_durable_v2_rsp),
117 .create_mxac_size = sizeof(struct create_mxac_rsp),
118 .create_disk_id_size = sizeof(struct create_disk_id_rsp),
119 .create_posix_size = sizeof(struct create_posix_rsp),
120};
121
122static struct smb_version_ops smb2_0_server_ops = {
123 .get_cmd_val = get_smb2_cmd_val,
124 .init_rsp_hdr = init_smb2_rsp_hdr,
125 .set_rsp_status = set_smb2_rsp_status,
126 .allocate_rsp_buf = smb2_allocate_rsp_buf,
127 .set_rsp_credits = smb2_set_rsp_credits,
128 .check_user_session = smb2_check_user_session,
129 .get_ksmbd_tcon = smb2_get_ksmbd_tcon,
130 .is_sign_req = smb2_is_sign_req,
131 .check_sign_req = smb2_check_sign_req,
132 .set_sign_rsp = smb2_set_sign_rsp
133};
134
135static struct smb_version_ops smb3_0_server_ops = {
136 .get_cmd_val = get_smb2_cmd_val,
137 .init_rsp_hdr = init_smb2_rsp_hdr,
138 .set_rsp_status = set_smb2_rsp_status,
139 .allocate_rsp_buf = smb2_allocate_rsp_buf,
140 .set_rsp_credits = smb2_set_rsp_credits,
141 .check_user_session = smb2_check_user_session,
142 .get_ksmbd_tcon = smb2_get_ksmbd_tcon,
143 .is_sign_req = smb2_is_sign_req,
144 .check_sign_req = smb3_check_sign_req,
145 .set_sign_rsp = smb3_set_sign_rsp,
146 .generate_signingkey = ksmbd_gen_smb30_signingkey,
147 .generate_encryptionkey = ksmbd_gen_smb30_encryptionkey,
148 .is_transform_hdr = smb3_is_transform_hdr,
149 .decrypt_req = smb3_decrypt_req,
150 .encrypt_resp = smb3_encrypt_resp
151};
152
153static struct smb_version_ops smb3_11_server_ops = {
154 .get_cmd_val = get_smb2_cmd_val,
155 .init_rsp_hdr = init_smb2_rsp_hdr,
156 .set_rsp_status = set_smb2_rsp_status,
157 .allocate_rsp_buf = smb2_allocate_rsp_buf,
158 .set_rsp_credits = smb2_set_rsp_credits,
159 .check_user_session = smb2_check_user_session,
160 .get_ksmbd_tcon = smb2_get_ksmbd_tcon,
161 .is_sign_req = smb2_is_sign_req,
162 .check_sign_req = smb3_check_sign_req,
163 .set_sign_rsp = smb3_set_sign_rsp,
164 .generate_signingkey = ksmbd_gen_smb311_signingkey,
165 .generate_encryptionkey = ksmbd_gen_smb311_encryptionkey,
166 .is_transform_hdr = smb3_is_transform_hdr,
167 .decrypt_req = smb3_decrypt_req,
168 .encrypt_resp = smb3_encrypt_resp
169};
170
171static struct smb_version_cmds smb2_0_server_cmds[NUMBER_OF_SMB2_COMMANDS] = {
172 [SMB2_NEGOTIATE_HE] = { .proc = smb2_negotiate_request, },
173 [SMB2_SESSION_SETUP_HE] = { .proc = smb2_sess_setup, },
174 [SMB2_TREE_CONNECT_HE] = { .proc = smb2_tree_connect,},
175 [SMB2_TREE_DISCONNECT_HE] = { .proc = smb2_tree_disconnect,},
176 [SMB2_LOGOFF_HE] = { .proc = smb2_session_logoff,},
177 [SMB2_CREATE_HE] = { .proc = smb2_open},
178 [SMB2_QUERY_INFO_HE] = { .proc = smb2_query_info},
179 [SMB2_QUERY_DIRECTORY_HE] = { .proc = smb2_query_dir},
180 [SMB2_CLOSE_HE] = { .proc = smb2_close},
181 [SMB2_ECHO_HE] = { .proc = smb2_echo},
182 [SMB2_SET_INFO_HE] = { .proc = smb2_set_info},
183 [SMB2_READ_HE] = { .proc = smb2_read},
184 [SMB2_WRITE_HE] = { .proc = smb2_write},
185 [SMB2_FLUSH_HE] = { .proc = smb2_flush},
186 [SMB2_CANCEL_HE] = { .proc = smb2_cancel},
187 [SMB2_LOCK_HE] = { .proc = smb2_lock},
188 [SMB2_IOCTL_HE] = { .proc = smb2_ioctl},
189 [SMB2_OPLOCK_BREAK_HE] = { .proc = smb2_oplock_break},
190 [SMB2_CHANGE_NOTIFY_HE] = { .proc = smb2_notify},
191};
192
193/**
194 * init_smb2_1_server() - initialize a smb server connection with smb2.1
195 * command dispatcher
196 * @conn: connection instance
197 */
198void init_smb2_1_server(struct ksmbd_conn *conn)
199{
200 conn->vals = &smb21_server_values;
201 conn->ops = &smb2_0_server_ops;
202 conn->cmds = smb2_0_server_cmds;
203 conn->max_cmds = ARRAY_SIZE(smb2_0_server_cmds);
204 conn->signing_algorithm = SIGNING_ALG_HMAC_SHA256_LE;
205
206 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_LEASES)
207 conn->vals->capabilities |= SMB2_GLOBAL_CAP_LEASING;
208}
209
210/**
211 * init_smb3_0_server() - initialize a smb server connection with smb3.0
212 * command dispatcher
213 * @conn: connection instance
214 */
215void init_smb3_0_server(struct ksmbd_conn *conn)
216{
217 conn->vals = &smb30_server_values;
218 conn->ops = &smb3_0_server_ops;
219 conn->cmds = smb2_0_server_cmds;
220 conn->max_cmds = ARRAY_SIZE(smb2_0_server_cmds);
221 conn->signing_algorithm = SIGNING_ALG_AES_CMAC_LE;
222
223 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_LEASES)
224 conn->vals->capabilities |= SMB2_GLOBAL_CAP_LEASING |
225 SMB2_GLOBAL_CAP_DIRECTORY_LEASING;
226
227 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION &&
228 conn->cli_cap & SMB2_GLOBAL_CAP_ENCRYPTION)
229 conn->vals->capabilities |= SMB2_GLOBAL_CAP_ENCRYPTION;
230
231 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL)
232 conn->vals->capabilities |= SMB2_GLOBAL_CAP_MULTI_CHANNEL;
233}
234
235/**
236 * init_smb3_02_server() - initialize a smb server connection with smb3.02
237 * command dispatcher
238 * @conn: connection instance
239 */
240void init_smb3_02_server(struct ksmbd_conn *conn)
241{
242 conn->vals = &smb302_server_values;
243 conn->ops = &smb3_0_server_ops;
244 conn->cmds = smb2_0_server_cmds;
245 conn->max_cmds = ARRAY_SIZE(smb2_0_server_cmds);
246 conn->signing_algorithm = SIGNING_ALG_AES_CMAC_LE;
247
248 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_LEASES)
249 conn->vals->capabilities |= SMB2_GLOBAL_CAP_LEASING |
250 SMB2_GLOBAL_CAP_DIRECTORY_LEASING;
251
252 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION ||
253 (!(server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION_OFF) &&
254 conn->cli_cap & SMB2_GLOBAL_CAP_ENCRYPTION))
255 conn->vals->capabilities |= SMB2_GLOBAL_CAP_ENCRYPTION;
256
257 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL)
258 conn->vals->capabilities |= SMB2_GLOBAL_CAP_MULTI_CHANNEL;
259}
260
261/**
262 * init_smb3_11_server() - initialize a smb server connection with smb3.11
263 * command dispatcher
264 * @conn: connection instance
265 */
266int init_smb3_11_server(struct ksmbd_conn *conn)
267{
268 conn->vals = &smb311_server_values;
269 conn->ops = &smb3_11_server_ops;
270 conn->cmds = smb2_0_server_cmds;
271 conn->max_cmds = ARRAY_SIZE(smb2_0_server_cmds);
272 conn->signing_algorithm = SIGNING_ALG_AES_CMAC_LE;
273
274 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_LEASES)
275 conn->vals->capabilities |= SMB2_GLOBAL_CAP_LEASING |
276 SMB2_GLOBAL_CAP_DIRECTORY_LEASING;
277
278 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION ||
279 (!(server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION_OFF) &&
280 conn->cli_cap & SMB2_GLOBAL_CAP_ENCRYPTION))
281 conn->vals->capabilities |= SMB2_GLOBAL_CAP_ENCRYPTION;
282
283 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL)
284 conn->vals->capabilities |= SMB2_GLOBAL_CAP_MULTI_CHANNEL;
285
286 INIT_LIST_HEAD(&conn->preauth_sess_table);
287 return 0;
288}
289
290void init_smb2_max_read_size(unsigned int sz)
291{
292 sz = clamp_val(sz, SMB3_MIN_IOSIZE, SMB3_MAX_IOSIZE);
293 smb21_server_values.max_read_size = sz;
294 smb30_server_values.max_read_size = sz;
295 smb302_server_values.max_read_size = sz;
296 smb311_server_values.max_read_size = sz;
297}
298
299void init_smb2_max_write_size(unsigned int sz)
300{
301 sz = clamp_val(sz, SMB3_MIN_IOSIZE, SMB3_MAX_IOSIZE);
302 smb21_server_values.max_write_size = sz;
303 smb30_server_values.max_write_size = sz;
304 smb302_server_values.max_write_size = sz;
305 smb311_server_values.max_write_size = sz;
306}
307
308void init_smb2_max_trans_size(unsigned int sz)
309{
310 sz = clamp_val(sz, SMB3_MIN_IOSIZE, SMB3_MAX_IOSIZE);
311 smb21_server_values.max_trans_size = sz;
312 smb30_server_values.max_trans_size = sz;
313 smb302_server_values.max_trans_size = sz;
314 smb311_server_values.max_trans_size = sz;
315}
316
317void init_smb2_max_credits(unsigned int sz)
318{
319 smb21_server_values.max_credits = sz;
320 smb30_server_values.max_credits = sz;
321 smb302_server_values.max_credits = sz;
322 smb311_server_values.max_credits = sz;
323}