1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * Copyright (C) 2018 Samsung Electronics Co., Ltd. 4 */ 5 6 #ifndef __SMB_COMMON_H__ 7 #define __SMB_COMMON_H__ 8 9 #include <linux/kernel.h> 10 11 #include "glob.h" 12 #include "nterr.h" 13 #include "../common/smb2pdu.h" 14 #include "smb2pdu.h" 15 16 /* ksmbd's Specific ERRNO */ 17 #define ESHARE 50000 18 19 #define SMB1_PROT 0 20 #define SMB2_PROT 1 21 #define SMB21_PROT 2 22 /* multi-protocol negotiate request */ 23 #define SMB2X_PROT 3 24 #define SMB30_PROT 4 25 #define SMB302_PROT 5 26 #define SMB311_PROT 6 27 #define BAD_PROT 0xFFFF 28 29 #define SMB1_VERSION_STRING "1.0" 30 #define SMB20_VERSION_STRING "2.0" 31 #define SMB21_VERSION_STRING "2.1" 32 #define SMB30_VERSION_STRING "3.0" 33 #define SMB302_VERSION_STRING "3.02" 34 #define SMB311_VERSION_STRING "3.1.1" 35 36 #define SMB_ECHO_INTERVAL (60 * HZ) 37 38 #define CIFS_DEFAULT_IOSIZE (64 * 1024) 39 #define MAX_CIFS_SMALL_BUFFER_SIZE 448 /* big enough for most */ 40 41 #define MAX_STREAM_PROT_LEN 0x00FFFFFF 42 43 /* Responses when opening a file. */ 44 #define F_SUPERSEDED 0 45 #define F_OPENED 1 46 #define F_CREATED 2 47 #define F_OVERWRITTEN 3 48 49 /* 50 * File Attribute flags 51 */ 52 #define ATTR_POSIX_SEMANTICS 0x01000000 53 #define ATTR_BACKUP_SEMANTICS 0x02000000 54 #define ATTR_DELETE_ON_CLOSE 0x04000000 55 #define ATTR_SEQUENTIAL_SCAN 0x08000000 56 #define ATTR_RANDOM_ACCESS 0x10000000 57 #define ATTR_NO_BUFFERING 0x20000000 58 #define ATTR_WRITE_THROUGH 0x80000000 59 60 /* List of FileSystemAttributes - see 2.5.1 of MS-FSCC */ 61 #define FILE_SUPPORTS_SPARSE_VDL 0x10000000 /* faster nonsparse extend */ 62 #define FILE_SUPPORTS_BLOCK_REFCOUNTING 0x08000000 /* allow ioctl dup extents */ 63 #define FILE_SUPPORT_INTEGRITY_STREAMS 0x04000000 64 #define FILE_SUPPORTS_USN_JOURNAL 0x02000000 65 #define FILE_SUPPORTS_OPEN_BY_FILE_ID 0x01000000 66 #define FILE_SUPPORTS_EXTENDED_ATTRIBUTES 0x00800000 67 #define FILE_SUPPORTS_HARD_LINKS 0x00400000 68 #define FILE_SUPPORTS_TRANSACTIONS 0x00200000 69 #define FILE_SEQUENTIAL_WRITE_ONCE 0x00100000 70 #define FILE_READ_ONLY_VOLUME 0x00080000 71 #define FILE_NAMED_STREAMS 0x00040000 72 #define FILE_SUPPORTS_ENCRYPTION 0x00020000 73 #define FILE_SUPPORTS_OBJECT_IDS 0x00010000 74 #define FILE_VOLUME_IS_COMPRESSED 0x00008000 75 #define FILE_SUPPORTS_REMOTE_STORAGE 0x00000100 76 #define FILE_SUPPORTS_REPARSE_POINTS 0x00000080 77 #define FILE_SUPPORTS_SPARSE_FILES 0x00000040 78 #define FILE_VOLUME_QUOTAS 0x00000020 79 #define FILE_FILE_COMPRESSION 0x00000010 80 #define FILE_PERSISTENT_ACLS 0x00000008 81 #define FILE_UNICODE_ON_DISK 0x00000004 82 #define FILE_CASE_PRESERVED_NAMES 0x00000002 83 #define FILE_CASE_SENSITIVE_SEARCH 0x00000001 84 85 #define FILE_READ_DATA 0x00000001 /* Data can be read from the file */ 86 #define FILE_WRITE_DATA 0x00000002 /* Data can be written to the file */ 87 #define FILE_APPEND_DATA 0x00000004 /* Data can be appended to the file */ 88 #define FILE_READ_EA 0x00000008 /* Extended attributes associated */ 89 /* with the file can be read */ 90 #define FILE_WRITE_EA 0x00000010 /* Extended attributes associated */ 91 /* with the file can be written */ 92 #define FILE_EXECUTE 0x00000020 /*Data can be read into memory from */ 93 /* the file using system paging I/O */ 94 #define FILE_DELETE_CHILD 0x00000040 95 #define FILE_READ_ATTRIBUTES 0x00000080 /* Attributes associated with the */ 96 /* file can be read */ 97 #define FILE_WRITE_ATTRIBUTES 0x00000100 /* Attributes associated with the */ 98 /* file can be written */ 99 #define DELETE 0x00010000 /* The file can be deleted */ 100 #define READ_CONTROL 0x00020000 /* The access control list and */ 101 /* ownership associated with the */ 102 /* file can be read */ 103 #define WRITE_DAC 0x00040000 /* The access control list and */ 104 /* ownership associated with the */ 105 /* file can be written. */ 106 #define WRITE_OWNER 0x00080000 /* Ownership information associated */ 107 /* with the file can be written */ 108 #define SYNCHRONIZE 0x00100000 /* The file handle can waited on to */ 109 /* synchronize with the completion */ 110 /* of an input/output request */ 111 #define GENERIC_ALL 0x10000000 112 #define GENERIC_EXECUTE 0x20000000 113 #define GENERIC_WRITE 0x40000000 114 #define GENERIC_READ 0x80000000 115 /* In summary - Relevant file */ 116 /* access flags from CIFS are */ 117 /* file_read_data, file_write_data */ 118 /* file_execute, file_read_attributes*/ 119 /* write_dac, and delete. */ 120 121 #define SET_FILE_READ_RIGHTS (FILE_READ_DATA | FILE_READ_EA \ 122 | FILE_READ_ATTRIBUTES \ 123 | DELETE | READ_CONTROL | WRITE_DAC \ 124 | WRITE_OWNER | SYNCHRONIZE) 125 #define SET_FILE_WRITE_RIGHTS (FILE_WRITE_DATA | FILE_APPEND_DATA \ 126 | FILE_WRITE_EA \ 127 | FILE_DELETE_CHILD \ 128 | FILE_WRITE_ATTRIBUTES \ 129 | DELETE | READ_CONTROL | WRITE_DAC \ 130 | WRITE_OWNER | SYNCHRONIZE) 131 #define SET_FILE_EXEC_RIGHTS (FILE_READ_EA | FILE_WRITE_EA | FILE_EXECUTE \ 132 | FILE_READ_ATTRIBUTES \ 133 | FILE_WRITE_ATTRIBUTES \ 134 | DELETE | READ_CONTROL | WRITE_DAC \ 135 | WRITE_OWNER | SYNCHRONIZE) 136 137 #define SET_MINIMUM_RIGHTS (FILE_READ_EA | FILE_READ_ATTRIBUTES \ 138 | READ_CONTROL | SYNCHRONIZE) 139 140 /* generic flags for file open */ 141 #define GENERIC_READ_FLAGS (READ_CONTROL | FILE_READ_DATA | \ 142 FILE_READ_ATTRIBUTES | \ 143 FILE_READ_EA | SYNCHRONIZE) 144 145 #define GENERIC_WRITE_FLAGS (READ_CONTROL | FILE_WRITE_DATA | \ 146 FILE_WRITE_ATTRIBUTES | FILE_WRITE_EA | \ 147 FILE_APPEND_DATA | SYNCHRONIZE) 148 149 #define GENERIC_EXECUTE_FLAGS (READ_CONTROL | FILE_EXECUTE | \ 150 FILE_READ_ATTRIBUTES | SYNCHRONIZE) 151 152 #define GENERIC_ALL_FLAGS (DELETE | READ_CONTROL | WRITE_DAC | \ 153 WRITE_OWNER | SYNCHRONIZE | FILE_READ_DATA | \ 154 FILE_WRITE_DATA | FILE_APPEND_DATA | \ 155 FILE_READ_EA | FILE_WRITE_EA | \ 156 FILE_EXECUTE | FILE_DELETE_CHILD | \ 157 FILE_READ_ATTRIBUTES | FILE_WRITE_ATTRIBUTES) 158 159 #define SMB1_PROTO_NUMBER cpu_to_le32(0x424d53ff) 160 #define SMB_COM_NEGOTIATE 0x72 161 #define SMB1_CLIENT_GUID_SIZE (16) 162 163 #define SMBFLG_RESPONSE 0x80 /* this PDU is a response from server */ 164 165 #define SMBFLG2_IS_LONG_NAME cpu_to_le16(0x40) 166 #define SMBFLG2_EXT_SEC cpu_to_le16(0x800) 167 #define SMBFLG2_ERR_STATUS cpu_to_le16(0x4000) 168 #define SMBFLG2_UNICODE cpu_to_le16(0x8000) 169 170 struct smb_hdr { 171 __be32 smb_buf_length; 172 __u8 Protocol[4]; 173 __u8 Command; 174 union { 175 struct { 176 __u8 ErrorClass; 177 __u8 Reserved; 178 __le16 Error; 179 } __packed DosError; 180 __le32 CifsError; 181 } __packed Status; 182 __u8 Flags; 183 __le16 Flags2; /* note: le */ 184 __le16 PidHigh; 185 union { 186 struct { 187 __le32 SequenceNumber; /* le */ 188 __u32 Reserved; /* zero */ 189 } __packed Sequence; 190 __u8 SecuritySignature[8]; /* le */ 191 } __packed Signature; 192 __u8 pad[2]; 193 __le16 Tid; 194 __le16 Pid; 195 __le16 Uid; 196 __le16 Mid; 197 __u8 WordCount; 198 } __packed; 199 200 struct smb_negotiate_req { 201 struct smb_hdr hdr; /* wct = 0 */ 202 __le16 ByteCount; 203 unsigned char DialectsArray[]; 204 } __packed; 205 206 struct smb_negotiate_rsp { 207 struct smb_hdr hdr; /* wct = 17 */ 208 __le16 DialectIndex; /* 0xFFFF = no dialect acceptable */ 209 __le16 ByteCount; 210 } __packed; 211 212 struct filesystem_attribute_info { 213 __le32 Attributes; 214 __le32 MaxPathNameComponentLength; 215 __le32 FileSystemNameLen; 216 __le16 FileSystemName[1]; /* do not have to save this - get subset? */ 217 } __packed; 218 219 struct filesystem_device_info { 220 __le32 DeviceType; 221 __le32 DeviceCharacteristics; 222 } __packed; /* device info level 0x104 */ 223 224 struct filesystem_vol_info { 225 __le64 VolumeCreationTime; 226 __le32 SerialNumber; 227 __le32 VolumeLabelSize; 228 __le16 Reserved; 229 __le16 VolumeLabel[1]; 230 } __packed; 231 232 struct filesystem_info { 233 __le64 TotalAllocationUnits; 234 __le64 FreeAllocationUnits; 235 __le32 SectorsPerAllocationUnit; 236 __le32 BytesPerSector; 237 } __packed; /* size info, level 0x103 */ 238 239 #define EXTENDED_INFO_MAGIC 0x43667364 /* Cfsd */ 240 #define STRING_LENGTH 28 241 242 struct fs_extended_info { 243 __le32 magic; 244 __le32 version; 245 __le32 release; 246 __u64 rel_date; 247 char version_string[STRING_LENGTH]; 248 } __packed; 249 250 struct object_id_info { 251 char objid[16]; 252 struct fs_extended_info extended_info; 253 } __packed; 254 255 struct file_directory_info { 256 __le32 NextEntryOffset; 257 __u32 FileIndex; 258 __le64 CreationTime; 259 __le64 LastAccessTime; 260 __le64 LastWriteTime; 261 __le64 ChangeTime; 262 __le64 EndOfFile; 263 __le64 AllocationSize; 264 __le32 ExtFileAttributes; 265 __le32 FileNameLength; 266 char FileName[]; 267 } __packed; /* level 0x101 FF resp data */ 268 269 struct file_names_info { 270 __le32 NextEntryOffset; 271 __u32 FileIndex; 272 __le32 FileNameLength; 273 char FileName[]; 274 } __packed; /* level 0xc FF resp data */ 275 276 struct file_full_directory_info { 277 __le32 NextEntryOffset; 278 __u32 FileIndex; 279 __le64 CreationTime; 280 __le64 LastAccessTime; 281 __le64 LastWriteTime; 282 __le64 ChangeTime; 283 __le64 EndOfFile; 284 __le64 AllocationSize; 285 __le32 ExtFileAttributes; 286 __le32 FileNameLength; 287 __le32 EaSize; 288 char FileName[]; 289 } __packed; /* level 0x102 FF resp */ 290 291 struct file_both_directory_info { 292 __le32 NextEntryOffset; 293 __u32 FileIndex; 294 __le64 CreationTime; 295 __le64 LastAccessTime; 296 __le64 LastWriteTime; 297 __le64 ChangeTime; 298 __le64 EndOfFile; 299 __le64 AllocationSize; 300 __le32 ExtFileAttributes; 301 __le32 FileNameLength; 302 __le32 EaSize; /* length of the xattrs */ 303 __u8 ShortNameLength; 304 __u8 Reserved; 305 __u8 ShortName[24]; 306 char FileName[]; 307 } __packed; /* level 0x104 FFrsp data */ 308 309 struct file_id_both_directory_info { 310 __le32 NextEntryOffset; 311 __u32 FileIndex; 312 __le64 CreationTime; 313 __le64 LastAccessTime; 314 __le64 LastWriteTime; 315 __le64 ChangeTime; 316 __le64 EndOfFile; 317 __le64 AllocationSize; 318 __le32 ExtFileAttributes; 319 __le32 FileNameLength; 320 __le32 EaSize; /* length of the xattrs */ 321 __u8 ShortNameLength; 322 __u8 Reserved; 323 __u8 ShortName[24]; 324 __le16 Reserved2; 325 __le64 UniqueId; 326 char FileName[]; 327 } __packed; 328 329 struct file_id_full_dir_info { 330 __le32 NextEntryOffset; 331 __u32 FileIndex; 332 __le64 CreationTime; 333 __le64 LastAccessTime; 334 __le64 LastWriteTime; 335 __le64 ChangeTime; 336 __le64 EndOfFile; 337 __le64 AllocationSize; 338 __le32 ExtFileAttributes; 339 __le32 FileNameLength; 340 __le32 EaSize; /* EA size */ 341 __le32 Reserved; 342 __le64 UniqueId; /* inode num - le since Samba puts ino in low 32 bit*/ 343 char FileName[]; 344 } __packed; /* level 0x105 FF rsp data */ 345 346 struct smb_version_values { 347 char *version_string; 348 __u16 protocol_id; 349 __le16 lock_cmd; 350 __u32 capabilities; 351 __u32 max_read_size; 352 __u32 max_write_size; 353 __u32 max_trans_size; 354 __u32 max_credits; 355 __u32 large_lock_type; 356 __u32 exclusive_lock_type; 357 __u32 shared_lock_type; 358 __u32 unlock_lock_type; 359 size_t header_size; 360 size_t max_header_size; 361 size_t read_rsp_size; 362 unsigned int cap_unix; 363 unsigned int cap_nt_find; 364 unsigned int cap_large_files; 365 __u16 signing_enabled; 366 __u16 signing_required; 367 size_t create_lease_size; 368 size_t create_durable_size; 369 size_t create_durable_v2_size; 370 size_t create_mxac_size; 371 size_t create_disk_id_size; 372 size_t create_posix_size; 373 }; 374 375 struct filesystem_posix_info { 376 /* For undefined recommended transfer size return -1 in that field */ 377 __le32 OptimalTransferSize; /* bsize on some os, iosize on other os */ 378 __le32 BlockSize; 379 /* The next three fields are in terms of the block size. 380 * (above). If block size is unknown, 4096 would be a 381 * reasonable block size for a server to report. 382 * Note that returning the blocks/blocksavail removes need 383 * to make a second call (to QFSInfo level 0x103 to get this info. 384 * UserBlockAvail is typically less than or equal to BlocksAvail, 385 * if no distinction is made return the same value in each 386 */ 387 __le64 TotalBlocks; 388 __le64 BlocksAvail; /* bfree */ 389 __le64 UserBlocksAvail; /* bavail */ 390 /* For undefined Node fields or FSID return -1 */ 391 __le64 TotalFileNodes; 392 __le64 FreeFileNodes; 393 __le64 FileSysIdentifier; /* fsid */ 394 /* NB Namelen comes from FILE_SYSTEM_ATTRIBUTE_INFO call */ 395 /* NB flags can come from FILE_SYSTEM_DEVICE_INFO call */ 396 } __packed; 397 398 struct smb_version_ops { 399 u16 (*get_cmd_val)(struct ksmbd_work *swork); 400 int (*init_rsp_hdr)(struct ksmbd_work *swork); 401 void (*set_rsp_status)(struct ksmbd_work *swork, __le32 err); 402 int (*allocate_rsp_buf)(struct ksmbd_work *work); 403 int (*set_rsp_credits)(struct ksmbd_work *work); 404 int (*check_user_session)(struct ksmbd_work *work); 405 int (*get_ksmbd_tcon)(struct ksmbd_work *work); 406 bool (*is_sign_req)(struct ksmbd_work *work, unsigned int command); 407 int (*check_sign_req)(struct ksmbd_work *work); 408 void (*set_sign_rsp)(struct ksmbd_work *work); 409 int (*generate_signingkey)(struct ksmbd_session *sess, struct ksmbd_conn *conn); 410 int (*generate_encryptionkey)(struct ksmbd_conn *conn, struct ksmbd_session *sess); 411 bool (*is_transform_hdr)(void *buf); 412 int (*decrypt_req)(struct ksmbd_work *work); 413 int (*encrypt_resp)(struct ksmbd_work *work); 414 }; 415 416 struct smb_version_cmds { 417 int (*proc)(struct ksmbd_work *swork); 418 }; 419 420 int ksmbd_min_protocol(void); 421 int ksmbd_max_protocol(void); 422 423 int ksmbd_lookup_protocol_idx(char *str); 424 425 int ksmbd_verify_smb_message(struct ksmbd_work *work); 426 bool ksmbd_smb_request(struct ksmbd_conn *conn); 427 428 int ksmbd_lookup_dialect_by_id(__le16 *cli_dialects, __le16 dialects_count); 429 430 void ksmbd_init_smb_server(struct ksmbd_work *work); 431 432 struct ksmbd_kstat; 433 int ksmbd_populate_dot_dotdot_entries(struct ksmbd_work *work, 434 int info_level, 435 struct ksmbd_file *dir, 436 struct ksmbd_dir_info *d_info, 437 char *search_pattern, 438 int (*fn)(struct ksmbd_conn *, 439 int, 440 struct ksmbd_dir_info *, 441 struct ksmbd_kstat *)); 442 443 int ksmbd_extract_shortname(struct ksmbd_conn *conn, 444 const char *longname, 445 char *shortname); 446 447 int ksmbd_smb_negotiate_common(struct ksmbd_work *work, unsigned int command); 448 449 int ksmbd_smb_check_shared_mode(struct file *filp, struct ksmbd_file *curr_fp); 450 int ksmbd_override_fsids(struct ksmbd_work *work); 451 void ksmbd_revert_fsids(struct ksmbd_work *work); 452 453 unsigned int ksmbd_server_side_copy_max_chunk_count(void); 454 unsigned int ksmbd_server_side_copy_max_chunk_size(void); 455 unsigned int ksmbd_server_side_copy_max_total_size(void); 456 bool is_asterisk(char *p); 457 __le32 smb_map_generic_desired_access(__le32 daccess); 458 459 static inline unsigned int get_rfc1002_len(void *buf) 460 { 461 return be32_to_cpu(*((__be32 *)buf)) & 0xffffff; 462 } 463 464 static inline void inc_rfc1001_len(void *buf, int count) 465 { 466 be32_add_cpu((__be32 *)buf, count); 467 } 468 #endif /* __SMB_COMMON_H__ */ 469