summaryrefslogtreecommitdiff
path: root/fs/ksmbd/smb_common.h
blob: 50590842b651e7b153fc86cffd9d5f7f7b17f714 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 *   Copyright (C) 2018 Samsung Electronics Co., Ltd.
 */

#ifndef __SMB_COMMON_H__
#define __SMB_COMMON_H__

#include <linux/kernel.h>

#include "glob.h"
#include "nterr.h"
#include "../smbfs_common/smb2pdu.h"
#include "smb2pdu.h"

/* ksmbd's Specific ERRNO */
#define ESHARE			50000

#define SMB1_PROT		0
#define SMB2_PROT		1
#define SMB21_PROT		2
/* multi-protocol negotiate request */
#define SMB2X_PROT		3
#define SMB30_PROT		4
#define SMB302_PROT		5
#define SMB311_PROT		6
#define BAD_PROT		0xFFFF

#define SMB1_VERSION_STRING	"1.0"
#define SMB20_VERSION_STRING	"2.0"
#define SMB21_VERSION_STRING	"2.1"
#define SMB30_VERSION_STRING	"3.0"
#define SMB302_VERSION_STRING	"3.02"
#define SMB311_VERSION_STRING	"3.1.1"

#define SMB_ECHO_INTERVAL	(60 * HZ)

#define CIFS_DEFAULT_IOSIZE	(64 * 1024)
#define MAX_CIFS_SMALL_BUFFER_SIZE 448 /* big enough for most */

#define MAX_STREAM_PROT_LEN	0x00FFFFFF

/* Responses when opening a file. */
#define F_SUPERSEDED	0
#define F_OPENED	1
#define F_CREATED	2
#define F_OVERWRITTEN	3

/*
 * File Attribute flags
 */
#define ATTR_POSIX_SEMANTICS		0x01000000
#define ATTR_BACKUP_SEMANTICS		0x02000000
#define ATTR_DELETE_ON_CLOSE		0x04000000
#define ATTR_SEQUENTIAL_SCAN		0x08000000
#define ATTR_RANDOM_ACCESS		0x10000000
#define ATTR_NO_BUFFERING		0x20000000
#define ATTR_WRITE_THROUGH		0x80000000

/* List of FileSystemAttributes - see 2.5.1 of MS-FSCC */
#define FILE_SUPPORTS_SPARSE_VDL	0x10000000 /* faster nonsparse extend */
#define FILE_SUPPORTS_BLOCK_REFCOUNTING	0x08000000 /* allow ioctl dup extents */
#define FILE_SUPPORT_INTEGRITY_STREAMS	0x04000000
#define FILE_SUPPORTS_USN_JOURNAL	0x02000000
#define FILE_SUPPORTS_OPEN_BY_FILE_ID	0x01000000
#define FILE_SUPPORTS_EXTENDED_ATTRIBUTES 0x00800000
#define FILE_SUPPORTS_HARD_LINKS	0x00400000
#define FILE_SUPPORTS_TRANSACTIONS	0x00200000
#define FILE_SEQUENTIAL_WRITE_ONCE	0x00100000
#define FILE_READ_ONLY_VOLUME		0x00080000
#define FILE_NAMED_STREAMS		0x00040000
#define FILE_SUPPORTS_ENCRYPTION	0x00020000
#define FILE_SUPPORTS_OBJECT_IDS	0x00010000
#define FILE_VOLUME_IS_COMPRESSED	0x00008000
#define FILE_SUPPORTS_REMOTE_STORAGE	0x00000100
#define FILE_SUPPORTS_REPARSE_POINTS	0x00000080
#define FILE_SUPPORTS_SPARSE_FILES	0x00000040
#define FILE_VOLUME_QUOTAS		0x00000020
#define FILE_FILE_COMPRESSION		0x00000010
#define FILE_PERSISTENT_ACLS		0x00000008
#define FILE_UNICODE_ON_DISK		0x00000004
#define FILE_CASE_PRESERVED_NAMES	0x00000002
#define FILE_CASE_SENSITIVE_SEARCH	0x00000001

#define FILE_READ_DATA        0x00000001  /* Data can be read from the file   */
#define FILE_WRITE_DATA       0x00000002  /* Data can be written to the file  */
#define FILE_APPEND_DATA      0x00000004  /* Data can be appended to the file */
#define FILE_READ_EA          0x00000008  /* Extended attributes associated   */
/* with the file can be read        */
#define FILE_WRITE_EA         0x00000010  /* Extended attributes associated   */
/* with the file can be written     */
#define FILE_EXECUTE          0x00000020  /*Data can be read into memory from */
/* the file using system paging I/O */
#define FILE_DELETE_CHILD     0x00000040
#define FILE_READ_ATTRIBUTES  0x00000080  /* Attributes associated with the   */
/* file can be read                 */
#define FILE_WRITE_ATTRIBUTES 0x00000100  /* Attributes associated with the   */
/* file can be written              */
#define DELETE                0x00010000  /* The file can be deleted          */
#define READ_CONTROL          0x00020000  /* The access control list and      */
/* ownership associated with the    */
/* file can be read                 */
#define WRITE_DAC             0x00040000  /* The access control list and      */
/* ownership associated with the    */
/* file can be written.             */
#define WRITE_OWNER           0x00080000  /* Ownership information associated */
/* with the file can be written     */
#define SYNCHRONIZE           0x00100000  /* The file handle can waited on to */
/* synchronize with the completion  */
/* of an input/output request       */
#define GENERIC_ALL           0x10000000
#define GENERIC_EXECUTE       0x20000000
#define GENERIC_WRITE         0x40000000
#define GENERIC_READ          0x80000000
/* In summary - Relevant file       */
/* access flags from CIFS are       */
/* file_read_data, file_write_data  */
/* file_execute, file_read_attributes*/
/* write_dac, and delete.           */

#define SET_FILE_READ_RIGHTS (FILE_READ_DATA | FILE_READ_EA \
		| FILE_READ_ATTRIBUTES \
		| DELETE | READ_CONTROL | WRITE_DAC \
		| WRITE_OWNER | SYNCHRONIZE)
#define SET_FILE_WRITE_RIGHTS (FILE_WRITE_DATA | FILE_APPEND_DATA \
		| FILE_WRITE_EA \
		| FILE_DELETE_CHILD \
		| FILE_WRITE_ATTRIBUTES \
		| DELETE | READ_CONTROL | WRITE_DAC \
		| WRITE_OWNER | SYNCHRONIZE)
#define SET_FILE_EXEC_RIGHTS (FILE_READ_EA | FILE_WRITE_EA | FILE_EXECUTE \
		| FILE_READ_ATTRIBUTES \
		| FILE_WRITE_ATTRIBUTES \
		| DELETE | READ_CONTROL | WRITE_DAC \
		| WRITE_OWNER | SYNCHRONIZE)

#define SET_MINIMUM_RIGHTS (FILE_READ_EA | FILE_READ_ATTRIBUTES \
		| READ_CONTROL | SYNCHRONIZE)

/* generic flags for file open */
#define GENERIC_READ_FLAGS	(READ_CONTROL | FILE_READ_DATA | \
		FILE_READ_ATTRIBUTES | \
		FILE_READ_EA | SYNCHRONIZE)

#define GENERIC_WRITE_FLAGS	(READ_CONTROL | FILE_WRITE_DATA | \
		FILE_WRITE_ATTRIBUTES | FILE_WRITE_EA | \
		FILE_APPEND_DATA | SYNCHRONIZE)

#define GENERIC_EXECUTE_FLAGS	(READ_CONTROL | FILE_EXECUTE | \
		FILE_READ_ATTRIBUTES | SYNCHRONIZE)

#define GENERIC_ALL_FLAGS	(DELETE | READ_CONTROL | WRITE_DAC | \
		WRITE_OWNER | SYNCHRONIZE | FILE_READ_DATA | \
		FILE_WRITE_DATA | FILE_APPEND_DATA | \
		FILE_READ_EA | FILE_WRITE_EA | \
		FILE_EXECUTE | FILE_DELETE_CHILD | \
		FILE_READ_ATTRIBUTES | FILE_WRITE_ATTRIBUTES)

#define SMB1_PROTO_NUMBER		cpu_to_le32(0x424d53ff)
#define SMB_COM_NEGOTIATE		0x72

#define SMB1_CLIENT_GUID_SIZE		(16)
struct smb_hdr {
	__be32 smb_buf_length;
	__u8 Protocol[4];
	__u8 Command;
	union {
		struct {
			__u8 ErrorClass;
			__u8 Reserved;
			__le16 Error;
		} __packed DosError;
		__le32 CifsError;
	} __packed Status;
	__u8 Flags;
	__le16 Flags2;          /* note: le */
	__le16 PidHigh;
	union {
		struct {
			__le32 SequenceNumber;  /* le */
			__u32 Reserved; /* zero */
		} __packed Sequence;
		__u8 SecuritySignature[8];      /* le */
	} __packed Signature;
	__u8 pad[2];
	__le16 Tid;
	__le16 Pid;
	__le16 Uid;
	__le16 Mid;
	__u8 WordCount;
} __packed;

struct smb_negotiate_req {
	struct smb_hdr hdr;     /* wct = 0 */
	__le16 ByteCount;
	unsigned char DialectsArray[1];
} __packed;

struct smb_negotiate_rsp {
	struct smb_hdr hdr;     /* wct = 17 */
	__le16 DialectIndex; /* 0xFFFF = no dialect acceptable */
	__u8 SecurityMode;
	__le16 MaxMpxCount;
	__le16 MaxNumberVcs;
	__le32 MaxBufferSize;
	__le32 MaxRawSize;
	__le32 SessionKey;
	__le32 Capabilities;    /* see below */
	__le32 SystemTimeLow;
	__le32 SystemTimeHigh;
	__le16 ServerTimeZone;
	__u8 EncryptionKeyLength;
	__le16 ByteCount;
	union {
		unsigned char EncryptionKey[8]; /* cap extended security off */
		/* followed by Domain name - if extended security is off */
		/* followed by 16 bytes of server GUID */
		/* then security blob if cap_extended_security negotiated */
		struct {
			unsigned char GUID[SMB1_CLIENT_GUID_SIZE];
			unsigned char SecurityBlob[1];
		} __packed extended_response;
	} __packed u;
} __packed;

struct filesystem_attribute_info {
	__le32 Attributes;
	__le32 MaxPathNameComponentLength;
	__le32 FileSystemNameLen;
	__le16 FileSystemName[1]; /* do not have to save this - get subset? */
} __packed;

struct filesystem_device_info {
	__le32 DeviceType;
	__le32 DeviceCharacteristics;
} __packed; /* device info level 0x104 */

struct filesystem_vol_info {
	__le64 VolumeCreationTime;
	__le32 SerialNumber;
	__le32 VolumeLabelSize;
	__le16 Reserved;
	__le16 VolumeLabel[1];
} __packed;

struct filesystem_info {
	__le64 TotalAllocationUnits;
	__le64 FreeAllocationUnits;
	__le32 SectorsPerAllocationUnit;
	__le32 BytesPerSector;
} __packed;     /* size info, level 0x103 */

#define EXTENDED_INFO_MAGIC 0x43667364	/* Cfsd */
#define STRING_LENGTH 28

struct fs_extended_info {
	__le32 magic;
	__le32 version;
	__le32 release;
	__u64 rel_date;
	char    version_string[STRING_LENGTH];
} __packed;

struct object_id_info {
	char objid[16];
	struct fs_extended_info extended_info;
} __packed;

struct file_directory_info {
	__le32 NextEntryOffset;
	__u32 FileIndex;
	__le64 CreationTime;
	__le64 LastAccessTime;
	__le64 LastWriteTime;
	__le64 ChangeTime;
	__le64 EndOfFile;
	__le64 AllocationSize;
	__le32 ExtFileAttributes;
	__le32 FileNameLength;
	char FileName[1];
} __packed;   /* level 0x101 FF resp data */

struct file_names_info {
	__le32 NextEntryOffset;
	__u32 FileIndex;
	__le32 FileNameLength;
	char FileName[1];
} __packed;   /* level 0xc FF resp data */

struct file_full_directory_info {
	__le32 NextEntryOffset;
	__u32 FileIndex;
	__le64 CreationTime;
	__le64 LastAccessTime;
	__le64 LastWriteTime;
	__le64 ChangeTime;
	__le64 EndOfFile;
	__le64 AllocationSize;
	__le32 ExtFileAttributes;
	__le32 FileNameLength;
	__le32 EaSize;
	char FileName[1];
} __packed; /* level 0x102 FF resp */

struct file_both_directory_info {
	__le32 NextEntryOffset;
	__u32 FileIndex;
	__le64 CreationTime;
	__le64 LastAccessTime;
	__le64 LastWriteTime;
	__le64 ChangeTime;
	__le64 EndOfFile;
	__le64 AllocationSize;
	__le32 ExtFileAttributes;
	__le32 FileNameLength;
	__le32 EaSize; /* length of the xattrs */
	__u8   ShortNameLength;
	__u8   Reserved;
	__u8   ShortName[24];
	char FileName[1];
} __packed; /* level 0x104 FFrsp data */

struct file_id_both_directory_info {
	__le32 NextEntryOffset;
	__u32 FileIndex;
	__le64 CreationTime;
	__le64 LastAccessTime;
	__le64 LastWriteTime;
	__le64 ChangeTime;
	__le64 EndOfFile;
	__le64 AllocationSize;
	__le32 ExtFileAttributes;
	__le32 FileNameLength;
	__le32 EaSize; /* length of the xattrs */
	__u8   ShortNameLength;
	__u8   Reserved;
	__u8   ShortName[24];
	__le16 Reserved2;
	__le64 UniqueId;
	char FileName[1];
} __packed;

struct file_id_full_dir_info {
	__le32 NextEntryOffset;
	__u32 FileIndex;
	__le64 CreationTime;
	__le64 LastAccessTime;
	__le64 LastWriteTime;
	__le64 ChangeTime;
	__le64 EndOfFile;
	__le64 AllocationSize;
	__le32 ExtFileAttributes;
	__le32 FileNameLength;
	__le32 EaSize; /* EA size */
	__le32 Reserved;
	__le64 UniqueId; /* inode num - le since Samba puts ino in low 32 bit*/
	char FileName[1];
} __packed; /* level 0x105 FF rsp data */

struct smb_version_values {
	char		*version_string;
	__u16		protocol_id;
	__le16		lock_cmd;
	__u32		capabilities;
	__u32		max_read_size;
	__u32		max_write_size;
	__u32		max_trans_size;
	__u32		large_lock_type;
	__u32		exclusive_lock_type;
	__u32		shared_lock_type;
	__u32		unlock_lock_type;
	size_t		header_size;
	size_t		max_header_size;
	size_t		read_rsp_size;
	unsigned int	cap_unix;
	unsigned int	cap_nt_find;
	unsigned int	cap_large_files;
	__u16		signing_enabled;
	__u16		signing_required;
	size_t		create_lease_size;
	size_t		create_durable_size;
	size_t		create_durable_v2_size;
	size_t		create_mxac_size;
	size_t		create_disk_id_size;
	size_t		create_posix_size;
};

struct filesystem_posix_info {
	/* For undefined recommended transfer size return -1 in that field */
	__le32 OptimalTransferSize;  /* bsize on some os, iosize on other os */
	__le32 BlockSize;
	/* The next three fields are in terms of the block size.
	 * (above). If block size is unknown, 4096 would be a
	 * reasonable block size for a server to report.
	 * Note that returning the blocks/blocksavail removes need
	 * to make a second call (to QFSInfo level 0x103 to get this info.
	 * UserBlockAvail is typically less than or equal to BlocksAvail,
	 * if no distinction is made return the same value in each
	 */
	__le64 TotalBlocks;
	__le64 BlocksAvail;       /* bfree */
	__le64 UserBlocksAvail;   /* bavail */
	/* For undefined Node fields or FSID return -1 */
	__le64 TotalFileNodes;
	__le64 FreeFileNodes;
	__le64 FileSysIdentifier;   /* fsid */
	/* NB Namelen comes from FILE_SYSTEM_ATTRIBUTE_INFO call */
	/* NB flags can come from FILE_SYSTEM_DEVICE_INFO call   */
} __packed;

struct smb_version_ops {
	u16 (*get_cmd_val)(struct ksmbd_work *swork);
	int (*init_rsp_hdr)(struct ksmbd_work *swork);
	void (*set_rsp_status)(struct ksmbd_work *swork, __le32 err);
	int (*allocate_rsp_buf)(struct ksmbd_work *work);
	int (*set_rsp_credits)(struct ksmbd_work *work);
	int (*check_user_session)(struct ksmbd_work *work);
	int (*get_ksmbd_tcon)(struct ksmbd_work *work);
	bool (*is_sign_req)(struct ksmbd_work *work, unsigned int command);
	int (*check_sign_req)(struct ksmbd_work *work);
	void (*set_sign_rsp)(struct ksmbd_work *work);
	int (*generate_signingkey)(struct ksmbd_session *sess, struct ksmbd_conn *conn);
	int (*generate_encryptionkey)(struct ksmbd_session *sess);
	bool (*is_transform_hdr)(void *buf);
	int (*decrypt_req)(struct ksmbd_work *work);
	int (*encrypt_resp)(struct ksmbd_work *work);
};

struct smb_version_cmds {
	int (*proc)(struct ksmbd_work *swork);
};

int ksmbd_min_protocol(void);
int ksmbd_max_protocol(void);

int ksmbd_lookup_protocol_idx(char *str);

int ksmbd_verify_smb_message(struct ksmbd_work *work);
bool ksmbd_smb_request(struct ksmbd_conn *conn);

int ksmbd_lookup_dialect_by_id(__le16 *cli_dialects, __le16 dialects_count);

int ksmbd_init_smb_server(struct ksmbd_work *work);

struct ksmbd_kstat;
int ksmbd_populate_dot_dotdot_entries(struct ksmbd_work *work,
				      int info_level,
				      struct ksmbd_file *dir,
				      struct ksmbd_dir_info *d_info,
				      char *search_pattern,
				      int (*fn)(struct ksmbd_conn *,
						int,
						struct ksmbd_dir_info *,
						struct ksmbd_kstat *));

int ksmbd_extract_shortname(struct ksmbd_conn *conn,
			    const char *longname,
			    char *shortname);

int ksmbd_smb_negotiate_common(struct ksmbd_work *work, unsigned int command);

int ksmbd_smb_check_shared_mode(struct file *filp, struct ksmbd_file *curr_fp);
int ksmbd_override_fsids(struct ksmbd_work *work);
void ksmbd_revert_fsids(struct ksmbd_work *work);

unsigned int ksmbd_server_side_copy_max_chunk_count(void);
unsigned int ksmbd_server_side_copy_max_chunk_size(void);
unsigned int ksmbd_server_side_copy_max_total_size(void);
bool is_asterisk(char *p);
__le32 smb_map_generic_desired_access(__le32 daccess);

static inline unsigned int get_rfc1002_len(void *buf)
{
	return be32_to_cpu(*((__be32 *)buf)) & 0xffffff;
}

static inline void inc_rfc1001_len(void *buf, int count)
{
	be32_add_cpu((__be32 *)buf, count);
}
#endif /* __SMB_COMMON_H__ */