fs/ksmbd/smb_common.h

   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 "smb2pdu.h"
  14
  15 /* ksmbd's Specific ERRNO */
  16 #define ESHARE                  50000
  17
  18 #define SMB1_PROT               0
  19 #define SMB2_PROT               1
  20 #define SMB21_PROT              2
  21 /* multi-protocol negotiate request */
  22 #define SMB2X_PROT              3
  23 #define SMB30_PROT              4
  24 #define SMB302_PROT             5
  25 #define SMB311_PROT             6
  26 #define BAD_PROT                0xFFFF
  27
  28 #define SMB1_VERSION_STRING     "1.0"
  29 #define SMB20_VERSION_STRING    "2.0"
  30 #define SMB21_VERSION_STRING    "2.1"
  31 #define SMB30_VERSION_STRING    "3.0"
  32 #define SMB302_VERSION_STRING   "3.02"
  33 #define SMB311_VERSION_STRING   "3.1.1"
  34
  35 /* Dialects */
  36 #define SMB10_PROT_ID           0x00
  37 #define SMB20_PROT_ID           0x0202
  38 #define SMB21_PROT_ID           0x0210
  39 /* multi-protocol negotiate request */
  40 #define SMB2X_PROT_ID           0x02FF
  41 #define SMB30_PROT_ID           0x0300
  42 #define SMB302_PROT_ID          0x0302
  43 #define SMB311_PROT_ID          0x0311
  44 #define BAD_PROT_ID             0xFFFF
  45
  46 #define SMB_ECHO_INTERVAL       (60 * HZ)
  47
  48 #define CIFS_DEFAULT_IOSIZE     (64 * 1024)
  49 #define MAX_CIFS_SMALL_BUFFER_SIZE 448 /* big enough for most */
  50
  51 /* RFC 1002 session packet types */
  52 #define RFC1002_SESSION_MESSAGE                 0x00
  53 #define RFC1002_SESSION_REQUEST                 0x81
  54 #define RFC1002_POSITIVE_SESSION_RESPONSE       0x82
  55 #define RFC1002_NEGATIVE_SESSION_RESPONSE       0x83
  56 #define RFC1002_RETARGET_SESSION_RESPONSE       0x84
  57 #define RFC1002_SESSION_KEEP_ALIVE              0x85
  58
  59 /* Responses when opening a file. */
  60 #define F_SUPERSEDED    0
  61 #define F_OPENED        1
  62 #define F_CREATED       2
  63 #define F_OVERWRITTEN   3
  64
  65 /*
  66  * File Attribute flags
  67  */
  68 #define ATTR_READONLY                   0x0001
  69 #define ATTR_HIDDEN                     0x0002
  70 #define ATTR_SYSTEM                     0x0004
  71 #define ATTR_VOLUME                     0x0008
  72 #define ATTR_DIRECTORY                  0x0010
  73 #define ATTR_ARCHIVE                    0x0020
  74 #define ATTR_DEVICE                     0x0040
  75 #define ATTR_NORMAL                     0x0080
  76 #define ATTR_TEMPORARY                  0x0100
  77 #define ATTR_SPARSE                     0x0200
  78 #define ATTR_REPARSE                    0x0400
  79 #define ATTR_COMPRESSED                 0x0800
  80 #define ATTR_OFFLINE                    0x1000
  81 #define ATTR_NOT_CONTENT_INDEXED        0x2000
  82 #define ATTR_ENCRYPTED                  0x4000
  83 #define ATTR_POSIX_SEMANTICS            0x01000000
  84 #define ATTR_BACKUP_SEMANTICS           0x02000000
  85 #define ATTR_DELETE_ON_CLOSE            0x04000000
  86 #define ATTR_SEQUENTIAL_SCAN            0x08000000
  87 #define ATTR_RANDOM_ACCESS              0x10000000
  88 #define ATTR_NO_BUFFERING               0x20000000
  89 #define ATTR_WRITE_THROUGH              0x80000000
  90
  91 #define ATTR_READONLY_LE                cpu_to_le32(ATTR_READONLY)
  92 #define ATTR_HIDDEN_LE                  cpu_to_le32(ATTR_HIDDEN)
  93 #define ATTR_SYSTEM_LE                  cpu_to_le32(ATTR_SYSTEM)
  94 #define ATTR_DIRECTORY_LE               cpu_to_le32(ATTR_DIRECTORY)
  95 #define ATTR_ARCHIVE_LE                 cpu_to_le32(ATTR_ARCHIVE)
  96 #define ATTR_NORMAL_LE                  cpu_to_le32(ATTR_NORMAL)
  97 #define ATTR_TEMPORARY_LE               cpu_to_le32(ATTR_TEMPORARY)
  98 #define ATTR_SPARSE_FILE_LE             cpu_to_le32(ATTR_SPARSE)
  99 #define ATTR_REPARSE_POINT_LE           cpu_to_le32(ATTR_REPARSE)
 100 #define ATTR_COMPRESSED_LE              cpu_to_le32(ATTR_COMPRESSED)
 101 #define ATTR_OFFLINE_LE                 cpu_to_le32(ATTR_OFFLINE)
 102 #define ATTR_NOT_CONTENT_INDEXED_LE     cpu_to_le32(ATTR_NOT_CONTENT_INDEXED)
 103 #define ATTR_ENCRYPTED_LE               cpu_to_le32(ATTR_ENCRYPTED)
 104 #define ATTR_INTEGRITY_STREAML_LE       cpu_to_le32(0x00008000)
 105 #define ATTR_NO_SCRUB_DATA_LE           cpu_to_le32(0x00020000)
 106 #define ATTR_MASK_LE                    cpu_to_le32(0x00007FB7)
 107
 108 /* List of FileSystemAttributes - see 2.5.1 of MS-FSCC */
 109 #define FILE_SUPPORTS_SPARSE_VDL        0x10000000 /* faster nonsparse extend */
 110 #define FILE_SUPPORTS_BLOCK_REFCOUNTING 0x08000000 /* allow ioctl dup extents */
 111 #define FILE_SUPPORT_INTEGRITY_STREAMS  0x04000000
 112 #define FILE_SUPPORTS_USN_JOURNAL       0x02000000
 113 #define FILE_SUPPORTS_OPEN_BY_FILE_ID   0x01000000
 114 #define FILE_SUPPORTS_EXTENDED_ATTRIBUTES 0x00800000
 115 #define FILE_SUPPORTS_HARD_LINKS        0x00400000
 116 #define FILE_SUPPORTS_TRANSACTIONS      0x00200000
 117 #define FILE_SEQUENTIAL_WRITE_ONCE      0x00100000
 118 #define FILE_READ_ONLY_VOLUME           0x00080000
 119 #define FILE_NAMED_STREAMS              0x00040000
 120 #define FILE_SUPPORTS_ENCRYPTION        0x00020000
 121 #define FILE_SUPPORTS_OBJECT_IDS        0x00010000
 122 #define FILE_VOLUME_IS_COMPRESSED       0x00008000
 123 #define FILE_SUPPORTS_REMOTE_STORAGE    0x00000100
 124 #define FILE_SUPPORTS_REPARSE_POINTS    0x00000080
 125 #define FILE_SUPPORTS_SPARSE_FILES      0x00000040
 126 #define FILE_VOLUME_QUOTAS              0x00000020
 127 #define FILE_FILE_COMPRESSION           0x00000010
 128 #define FILE_PERSISTENT_ACLS            0x00000008
 129 #define FILE_UNICODE_ON_DISK            0x00000004
 130 #define FILE_CASE_PRESERVED_NAMES       0x00000002
 131 #define FILE_CASE_SENSITIVE_SEARCH      0x00000001
 132
 133 #define FILE_READ_DATA        0x00000001  /* Data can be read from the file   */
 134 #define FILE_WRITE_DATA       0x00000002  /* Data can be written to the file  */
 135 #define FILE_APPEND_DATA      0x00000004  /* Data can be appended to the file */
 136 #define FILE_READ_EA          0x00000008  /* Extended attributes associated   */
 137 /* with the file can be read        */
 138 #define FILE_WRITE_EA         0x00000010  /* Extended attributes associated   */
 139 /* with the file can be written     */
 140 #define FILE_EXECUTE          0x00000020  /*Data can be read into memory from */
 141 /* the file using system paging I/O */
 142 #define FILE_DELETE_CHILD     0x00000040
 143 #define FILE_READ_ATTRIBUTES  0x00000080  /* Attributes associated with the   */
 144 /* file can be read                 */
 145 #define FILE_WRITE_ATTRIBUTES 0x00000100  /* Attributes associated with the   */
 146 /* file can be written              */
 147 #define DELETE                0x00010000  /* The file can be deleted          */
 148 #define READ_CONTROL          0x00020000  /* The access control list and      */
 149 /* ownership associated with the    */
 150 /* file can be read                 */
 151 #define WRITE_DAC             0x00040000  /* The access control list and      */
 152 /* ownership associated with the    */
 153 /* file can be written.             */
 154 #define WRITE_OWNER           0x00080000  /* Ownership information associated */
 155 /* with the file can be written     */
 156 #define SYNCHRONIZE           0x00100000  /* The file handle can waited on to */
 157 /* synchronize with the completion  */
 158 /* of an input/output request       */
 159 #define GENERIC_ALL           0x10000000
 160 #define GENERIC_EXECUTE       0x20000000
 161 #define GENERIC_WRITE         0x40000000
 162 #define GENERIC_READ          0x80000000
 163 /* In summary - Relevant file       */
 164 /* access flags from CIFS are       */
 165 /* file_read_data, file_write_data  */
 166 /* file_execute, file_read_attributes*/
 167 /* write_dac, and delete.           */
 168
 169 #define FILE_READ_RIGHTS (FILE_READ_DATA | FILE_READ_EA | FILE_READ_ATTRIBUTES)
 170 #define FILE_WRITE_RIGHTS (FILE_WRITE_DATA | FILE_APPEND_DATA \
 171                 | FILE_WRITE_EA | FILE_WRITE_ATTRIBUTES)
 172 #define FILE_EXEC_RIGHTS (FILE_EXECUTE)
 173
 174 #define SET_FILE_READ_RIGHTS (FILE_READ_DATA | FILE_READ_EA \
 175                 | FILE_READ_ATTRIBUTES \
 176                 | DELETE | READ_CONTROL | WRITE_DAC \
 177                 | WRITE_OWNER | SYNCHRONIZE)
 178 #define SET_FILE_WRITE_RIGHTS (FILE_WRITE_DATA | FILE_APPEND_DATA \
 179                 | FILE_WRITE_EA \
 180                 | FILE_DELETE_CHILD \
 181                 | FILE_WRITE_ATTRIBUTES \
 182                 | DELETE | READ_CONTROL | WRITE_DAC \
 183                 | WRITE_OWNER | SYNCHRONIZE)
 184 #define SET_FILE_EXEC_RIGHTS (FILE_READ_EA | FILE_WRITE_EA | FILE_EXECUTE \
 185                 | FILE_READ_ATTRIBUTES \
 186                 | FILE_WRITE_ATTRIBUTES \
 187                 | DELETE | READ_CONTROL | WRITE_DAC \
 188                 | WRITE_OWNER | SYNCHRONIZE)
 189
 190 #define SET_MINIMUM_RIGHTS (FILE_READ_EA | FILE_READ_ATTRIBUTES \
 191                 | READ_CONTROL | SYNCHRONIZE)
 192
 193 /* generic flags for file open */
 194 #define GENERIC_READ_FLAGS      (READ_CONTROL | FILE_READ_DATA | \
 195                 FILE_READ_ATTRIBUTES | \
 196                 FILE_READ_EA | SYNCHRONIZE)
 197
 198 #define GENERIC_WRITE_FLAGS     (READ_CONTROL | FILE_WRITE_DATA | \
 199                 FILE_WRITE_ATTRIBUTES | FILE_WRITE_EA | \
 200                 FILE_APPEND_DATA | SYNCHRONIZE)
 201
 202 #define GENERIC_EXECUTE_FLAGS   (READ_CONTROL | FILE_EXECUTE | \
 203                 FILE_READ_ATTRIBUTES | SYNCHRONIZE)
 204
 205 #define GENERIC_ALL_FLAGS       (DELETE | READ_CONTROL | WRITE_DAC | \
 206                 WRITE_OWNER | SYNCHRONIZE | FILE_READ_DATA | \
 207                 FILE_WRITE_DATA | FILE_APPEND_DATA | \
 208                 FILE_READ_EA | FILE_WRITE_EA | \
 209                 FILE_EXECUTE | FILE_DELETE_CHILD | \
 210                 FILE_READ_ATTRIBUTES | FILE_WRITE_ATTRIBUTES)
 211
 212 #define SMB1_PROTO_NUMBER               cpu_to_le32(0x424d53ff)
 213
 214 #define SMB1_CLIENT_GUID_SIZE           (16)
 215 struct smb_hdr {
 216         __be32 smb_buf_length;
 217         __u8 Protocol[4];
 218         __u8 Command;
 219         union {
 220                 struct {
 221                         __u8 ErrorClass;
 222                         __u8 Reserved;
 223                         __le16 Error;
 224                 } __packed DosError;
 225                 __le32 CifsError;
 226         } __packed Status;
 227         __u8 Flags;
 228         __le16 Flags2;          /* note: le */
 229         __le16 PidHigh;
 230         union {
 231                 struct {
 232                         __le32 SequenceNumber;  /* le */
 233                         __u32 Reserved; /* zero */
 234                 } __packed Sequence;
 235                 __u8 SecuritySignature[8];      /* le */
 236         } __packed Signature;
 237         __u8 pad[2];
 238         __le16 Tid;
 239         __le16 Pid;
 240         __le16 Uid;
 241         __le16 Mid;
 242         __u8 WordCount;
 243 } __packed;
 244
 245 struct smb_negotiate_req {
 246         struct smb_hdr hdr;     /* wct = 0 */
 247         __le16 ByteCount;
 248         unsigned char DialectsArray[1];
 249 } __packed;
 250
 251 struct smb_negotiate_rsp {
 252         struct smb_hdr hdr;     /* wct = 17 */
 253         __le16 DialectIndex; /* 0xFFFF = no dialect acceptable */
 254         __u8 SecurityMode;
 255         __le16 MaxMpxCount;
 256         __le16 MaxNumberVcs;
 257         __le32 MaxBufferSize;
 258         __le32 MaxRawSize;
 259         __le32 SessionKey;
 260         __le32 Capabilities;    /* see below */
 261         __le32 SystemTimeLow;
 262         __le32 SystemTimeHigh;
 263         __le16 ServerTimeZone;
 264         __u8 EncryptionKeyLength;
 265         __le16 ByteCount;
 266         union {
 267                 unsigned char EncryptionKey[8]; /* cap extended security off */
 268                 /* followed by Domain name - if extended security is off */
 269                 /* followed by 16 bytes of server GUID */
 270                 /* then security blob if cap_extended_security negotiated */
 271                 struct {
 272                         unsigned char GUID[SMB1_CLIENT_GUID_SIZE];
 273                         unsigned char SecurityBlob[1];
 274                 } __packed extended_response;
 275         } __packed u;
 276 } __packed;
 277
 278 struct filesystem_attribute_info {
 279         __le32 Attributes;
 280         __le32 MaxPathNameComponentLength;
 281         __le32 FileSystemNameLen;
 282         __le16 FileSystemName[1]; /* do not have to save this - get subset? */
 283 } __packed;
 284
 285 struct filesystem_device_info {
 286         __le32 DeviceType;
 287         __le32 DeviceCharacteristics;
 288 } __packed; /* device info level 0x104 */
 289
 290 struct filesystem_vol_info {
 291         __le64 VolumeCreationTime;
 292         __le32 SerialNumber;
 293         __le32 VolumeLabelSize;
 294         __le16 Reserved;
 295         __le16 VolumeLabel[1];
 296 } __packed;
 297
 298 struct filesystem_info {
 299         __le64 TotalAllocationUnits;
 300         __le64 FreeAllocationUnits;
 301         __le32 SectorsPerAllocationUnit;
 302         __le32 BytesPerSector;
 303 } __packed;     /* size info, level 0x103 */
 304
 305 #define EXTENDED_INFO_MAGIC 0x43667364  /* Cfsd */
 306 #define STRING_LENGTH 28
 307
 308 struct fs_extended_info {
 309         __le32 magic;
 310         __le32 version;
 311         __le32 release;
 312         __u64 rel_date;
 313         char    version_string[STRING_LENGTH];
 314 } __packed;
 315
 316 struct object_id_info {
 317         char objid[16];
 318         struct fs_extended_info extended_info;
 319 } __packed;
 320
 321 struct file_directory_info {
 322         __le32 NextEntryOffset;
 323         __u32 FileIndex;
 324         __le64 CreationTime;
 325         __le64 LastAccessTime;
 326         __le64 LastWriteTime;
 327         __le64 ChangeTime;
 328         __le64 EndOfFile;
 329         __le64 AllocationSize;
 330         __le32 ExtFileAttributes;
 331         __le32 FileNameLength;
 332         char FileName[1];
 333 } __packed;   /* level 0x101 FF resp data */
 334
 335 struct file_names_info {
 336         __le32 NextEntryOffset;
 337         __u32 FileIndex;
 338         __le32 FileNameLength;
 339         char FileName[1];
 340 } __packed;   /* level 0xc FF resp data */
 341
 342 struct file_full_directory_info {
 343         __le32 NextEntryOffset;
 344         __u32 FileIndex;
 345         __le64 CreationTime;
 346         __le64 LastAccessTime;
 347         __le64 LastWriteTime;
 348         __le64 ChangeTime;
 349         __le64 EndOfFile;
 350         __le64 AllocationSize;
 351         __le32 ExtFileAttributes;
 352         __le32 FileNameLength;
 353         __le32 EaSize;
 354         char FileName[1];
 355 } __packed; /* level 0x102 FF resp */
 356
 357 struct file_both_directory_info {
 358         __le32 NextEntryOffset;
 359         __u32 FileIndex;
 360         __le64 CreationTime;
 361         __le64 LastAccessTime;
 362         __le64 LastWriteTime;
 363         __le64 ChangeTime;
 364         __le64 EndOfFile;
 365         __le64 AllocationSize;
 366         __le32 ExtFileAttributes;
 367         __le32 FileNameLength;
 368         __le32 EaSize; /* length of the xattrs */
 369         __u8   ShortNameLength;
 370         __u8   Reserved;
 371         __u8   ShortName[24];
 372         char FileName[1];
 373 } __packed; /* level 0x104 FFrsp data */
 374
 375 struct file_id_both_directory_info {
 376         __le32 NextEntryOffset;
 377         __u32 FileIndex;
 378         __le64 CreationTime;
 379         __le64 LastAccessTime;
 380         __le64 LastWriteTime;
 381         __le64 ChangeTime;
 382         __le64 EndOfFile;
 383         __le64 AllocationSize;
 384         __le32 ExtFileAttributes;
 385         __le32 FileNameLength;
 386         __le32 EaSize; /* length of the xattrs */
 387         __u8   ShortNameLength;
 388         __u8   Reserved;
 389         __u8   ShortName[24];
 390         __le16 Reserved2;
 391         __le64 UniqueId;
 392         char FileName[1];
 393 } __packed;
 394
 395 struct file_id_full_dir_info {
 396         __le32 NextEntryOffset;
 397         __u32 FileIndex;
 398         __le64 CreationTime;
 399         __le64 LastAccessTime;
 400         __le64 LastWriteTime;
 401         __le64 ChangeTime;
 402         __le64 EndOfFile;
 403         __le64 AllocationSize;
 404         __le32 ExtFileAttributes;
 405         __le32 FileNameLength;
 406         __le32 EaSize; /* EA size */
 407         __le32 Reserved;
 408         __le64 UniqueId; /* inode num - le since Samba puts ino in low 32 bit*/
 409         char FileName[1];
 410 } __packed; /* level 0x105 FF rsp data */
 411
 412 struct smb_version_values {
 413         char            *version_string;
 414         __u16           protocol_id;
 415         __le16          lock_cmd;
 416         __u32           capabilities;
 417         __u32           max_read_size;
 418         __u32           max_write_size;
 419         __u32           max_trans_size;
 420         __u32           large_lock_type;
 421         __u32           exclusive_lock_type;
 422         __u32           shared_lock_type;
 423         __u32           unlock_lock_type;
 424         size_t          header_size;
 425         size_t          max_header_size;
 426         size_t          read_rsp_size;
 427         unsigned int    cap_unix;
 428         unsigned int    cap_nt_find;
 429         unsigned int    cap_large_files;
 430         __u16           signing_enabled;
 431         __u16           signing_required;
 432         size_t          create_lease_size;
 433         size_t          create_durable_size;
 434         size_t          create_durable_v2_size;
 435         size_t          create_mxac_size;
 436         size_t          create_disk_id_size;
 437         size_t          create_posix_size;
 438 };
 439
 440 struct filesystem_posix_info {
 441         /* For undefined recommended transfer size return -1 in that field */
 442         __le32 OptimalTransferSize;  /* bsize on some os, iosize on other os */
 443         __le32 BlockSize;
 444         /* The next three fields are in terms of the block size.
 445          * (above). If block size is unknown, 4096 would be a
 446          * reasonable block size for a server to report.
 447          * Note that returning the blocks/blocksavail removes need
 448          * to make a second call (to QFSInfo level 0x103 to get this info.
 449          * UserBlockAvail is typically less than or equal to BlocksAvail,
 450          * if no distinction is made return the same value in each
 451          */
 452         __le64 TotalBlocks;
 453         __le64 BlocksAvail;       /* bfree */
 454         __le64 UserBlocksAvail;   /* bavail */
 455         /* For undefined Node fields or FSID return -1 */
 456         __le64 TotalFileNodes;
 457         __le64 FreeFileNodes;
 458         __le64 FileSysIdentifier;   /* fsid */
 459         /* NB Namelen comes from FILE_SYSTEM_ATTRIBUTE_INFO call */
 460         /* NB flags can come from FILE_SYSTEM_DEVICE_INFO call   */
 461 } __packed;
 462
 463 struct smb_version_ops {
 464         u16 (*get_cmd_val)(struct ksmbd_work *swork);
 465         int (*init_rsp_hdr)(struct ksmbd_work *swork);
 466         void (*set_rsp_status)(struct ksmbd_work *swork, __le32 err);
 467         int (*allocate_rsp_buf)(struct ksmbd_work *work);
 468         int (*set_rsp_credits)(struct ksmbd_work *work);
 469         int (*check_user_session)(struct ksmbd_work *work);
 470         int (*get_ksmbd_tcon)(struct ksmbd_work *work);
 471         bool (*is_sign_req)(struct ksmbd_work *work, unsigned int command);
 472         int (*check_sign_req)(struct ksmbd_work *work);
 473         void (*set_sign_rsp)(struct ksmbd_work *work);
 474         int (*generate_signingkey)(struct ksmbd_session *sess, struct ksmbd_conn *conn);
 475         int (*generate_encryptionkey)(struct ksmbd_session *sess);
 476         bool (*is_transform_hdr)(void *buf);
 477         int (*decrypt_req)(struct ksmbd_work *work);
 478         int (*encrypt_resp)(struct ksmbd_work *work);
 479 };
 480
 481 struct smb_version_cmds {
 482         int (*proc)(struct ksmbd_work *swork);
 483 };
 484
 485 static inline size_t
 486 smb2_hdr_size_no_buflen(struct smb_version_values *vals)
 487 {
 488         return vals->header_size - 4;
 489 }
 490
 491 int ksmbd_min_protocol(void);
 492 int ksmbd_max_protocol(void);
 493
 494 int ksmbd_lookup_protocol_idx(char *str);
 495
 496 int ksmbd_verify_smb_message(struct ksmbd_work *work);
 497 bool ksmbd_smb_request(struct ksmbd_conn *conn);
 498
 499 int ksmbd_lookup_dialect_by_id(__le16 *cli_dialects, __le16 dialects_count);
 500
 501 int ksmbd_init_smb_server(struct ksmbd_work *work);
 502
 503 bool ksmbd_pdu_size_has_room(unsigned int pdu);
 504
 505 struct ksmbd_kstat;
 506 int ksmbd_populate_dot_dotdot_entries(struct ksmbd_work *work,
 507                                       int info_level,
 508                                       struct ksmbd_file *dir,
 509                                       struct ksmbd_dir_info *d_info,
 510                                       char *search_pattern,
 511                                       int (*fn)(struct ksmbd_conn *,
 512                                                 int,
 513                                                 struct ksmbd_dir_info *,
 514                                                 struct user_namespace *,
 515                                                 struct ksmbd_kstat *));
 516
 517 int ksmbd_extract_shortname(struct ksmbd_conn *conn,
 518                             const char *longname,
 519                             char *shortname);
 520
 521 int ksmbd_smb_negotiate_common(struct ksmbd_work *work, unsigned int command);
 522
 523 int ksmbd_smb_check_shared_mode(struct file *filp, struct ksmbd_file *curr_fp);
 524 int ksmbd_override_fsids(struct ksmbd_work *work);
 525 void ksmbd_revert_fsids(struct ksmbd_work *work);
 526
 527 unsigned int ksmbd_server_side_copy_max_chunk_count(void);
 528 unsigned int ksmbd_server_side_copy_max_chunk_size(void);
 529 unsigned int ksmbd_server_side_copy_max_total_size(void);
 530 bool is_asterisk(char *p);
 531 __le32 smb_map_generic_desired_access(__le32 daccess);
 532
 533 static inline unsigned int get_rfc1002_len(void *buf)
 534 {
 535         return be32_to_cpu(*((__be32 *)buf)) & 0xffffff;
 536 }
 537
 538 static inline void inc_rfc1001_len(void *buf, int count)
 539 {
 540         be32_add_cpu((__be32 *)buf, count);
 541 }
 542 #endif /* __SMB_COMMON_H__ */