fs/cifs/cifsproto.h

   1 /*
   2  *   fs/cifs/cifsproto.h
   3  *
   4  *   Copyright (c) International Business Machines  Corp., 2002,2008
   5  *   Author(s): Steve French (sfrench@us.ibm.com)
   6  *
   7  *   This library is free software; you can redistribute it and/or modify
   8  *   it under the terms of the GNU Lesser General Public License as published
   9  *   by the Free Software Foundation; either version 2.1 of the License, or
  10  *   (at your option) any later version.
  11  *
  12  *   This library is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  15  *   the GNU Lesser General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU Lesser General Public License
  18  *   along with this library; if not, write to the Free Software
  19  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  20  */
  21 #ifndef _CIFSPROTO_H
  22 #define _CIFSPROTO_H
  23 #include <linux/nls.h>
  24
  25 struct statfs;
  26 struct smb_vol;
  27
  28 /*
  29  *****************************************************************
  30  * All Prototypes
  31  *****************************************************************
  32  */
  33
  34 extern struct smb_hdr *cifs_buf_get(void);
  35 extern void cifs_buf_release(void *);
  36 extern struct smb_hdr *cifs_small_buf_get(void);
  37 extern void cifs_small_buf_release(void *);
  38 extern int smb_send(struct TCP_Server_Info *, struct smb_hdr *,
  39                         unsigned int /* length */);
  40 extern unsigned int _GetXid(void);
  41 extern void _FreeXid(unsigned int);
  42 #define GetXid()                                                \
  43 ({                                                              \
  44         int __xid = (int)_GetXid();                             \
  45         cFYI(1, "CIFS VFS: in %s as Xid: %d with uid: %d",      \
  46              __func__, __xid, current_fsuid());                 \
  47         __xid;                                                  \
  48 })
  49
  50 #define FreeXid(curr_xid)                                       \
  51 do {                                                            \
  52         _FreeXid(curr_xid);                                     \
  53         cFYI(1, "CIFS VFS: leaving %s (xid = %d) rc = %d",      \
  54              __func__, curr_xid, (int)rc);                      \
  55 } while (0)
  56 extern int init_cifs_idmap(void);
  57 extern void exit_cifs_idmap(void);
  58 extern void cifs_destroy_idmaptrees(void);
  59 extern char *build_path_from_dentry(struct dentry *);
  60 extern char *cifs_build_path_to_root(struct smb_vol *vol,
  61                                      struct cifs_sb_info *cifs_sb,
  62                                      struct cifs_tcon *tcon);
  63 extern char *build_wildcard_path_from_dentry(struct dentry *direntry);
  64 extern char *cifs_compose_mount_options(const char *sb_mountdata,
  65                 const char *fullpath, const struct dfs_info3_param *ref,
  66                 char **devname);
  67 /* extern void renew_parental_timestamps(struct dentry *direntry);*/
  68 extern struct mid_q_entry *AllocMidQEntry(const struct smb_hdr *smb_buffer,
  69                                         struct TCP_Server_Info *server);
  70 extern void DeleteMidQEntry(struct mid_q_entry *midEntry);
  71 extern int cifs_call_async(struct TCP_Server_Info *server, struct kvec *iov,
  72                            unsigned int nvec, mid_receive_t *receive,
  73                            mid_callback_t *callback, void *cbdata,
  74                            bool ignore_pend);
  75 extern int SendReceive(const unsigned int /* xid */ , struct cifs_ses *,
  76                         struct smb_hdr * /* input */ ,
  77                         struct smb_hdr * /* out */ ,
  78                         int * /* bytes returned */ , const int long_op);
  79 extern int SendReceiveNoRsp(const unsigned int xid, struct cifs_ses *ses,
  80                         struct smb_hdr *in_buf, int flags);
  81 extern int cifs_check_receive(struct mid_q_entry *mid,
  82                         struct TCP_Server_Info *server, bool log_error);
  83 extern int SendReceive2(const unsigned int /* xid */ , struct cifs_ses *,
  84                         struct kvec *, int /* nvec to send */,
  85                         int * /* type of buf returned */ , const int flags);
  86 extern int SendReceiveBlockingLock(const unsigned int xid,
  87                         struct cifs_tcon *ptcon,
  88                         struct smb_hdr *in_buf ,
  89                         struct smb_hdr *out_buf,
  90                         int *bytes_returned);
  91 extern int checkSMB(struct smb_hdr *smb, __u16 mid, unsigned int length);
  92 extern bool is_valid_oplock_break(struct smb_hdr *smb,
  93                                   struct TCP_Server_Info *);
  94 extern bool backup_cred(struct cifs_sb_info *);
  95 extern bool is_size_safe_to_change(struct cifsInodeInfo *, __u64 eof);
  96 extern void cifs_update_eof(struct cifsInodeInfo *cifsi, loff_t offset,
  97                             unsigned int bytes_written);
  98 extern struct cifsFileInfo *find_writable_file(struct cifsInodeInfo *, bool);
  99 extern struct cifsFileInfo *find_readable_file(struct cifsInodeInfo *, bool);
 100 extern unsigned int smbCalcSize(struct smb_hdr *ptr);
 101 extern int decode_negTokenInit(unsigned char *security_blob, int length,
 102                         struct TCP_Server_Info *server);
 103 extern int cifs_convert_address(struct sockaddr *dst, const char *src, int len);
 104 extern int cifs_set_port(struct sockaddr *addr, const unsigned short int port);
 105 extern int cifs_fill_sockaddr(struct sockaddr *dst, const char *src, int len,
 106                                 const unsigned short int port);
 107 extern int map_smb_to_linux_error(struct smb_hdr *smb, bool logErr);
 108 extern void header_assemble(struct smb_hdr *, char /* command */ ,
 109                             const struct cifs_tcon *, int /* length of
 110                             fixed section (word count) in two byte units */);
 111 extern int small_smb_init_no_tc(const int smb_cmd, const int wct,
 112                                 struct cifs_ses *ses,
 113                                 void **request_buf);
 114 extern int CIFS_SessSetup(unsigned int xid, struct cifs_ses *ses,
 115                              const struct nls_table *nls_cp);
 116 extern __u16 GetNextMid(struct TCP_Server_Info *server);
 117 extern struct timespec cifs_NTtimeToUnix(__le64 utc_nanoseconds_since_1601);
 118 extern u64 cifs_UnixTimeToNT(struct timespec);
 119 extern struct timespec cnvrtDosUnixTm(__le16 le_date, __le16 le_time,
 120                                       int offset);
 121 extern void cifs_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock);
 122
 123 extern struct cifsFileInfo *cifs_new_fileinfo(__u16 fileHandle,
 124                                 struct file *file, struct tcon_link *tlink,
 125                                 __u32 oplock);
 126 extern int cifs_posix_open(char *full_path, struct inode **pinode,
 127                                 struct super_block *sb,
 128                                 int mode, unsigned int f_flags,
 129                                 __u32 *poplock, __u16 *pnetfid, int xid);
 130 void cifs_fill_uniqueid(struct super_block *sb, struct cifs_fattr *fattr);
 131 extern void cifs_unix_basic_to_fattr(struct cifs_fattr *fattr,
 132                                      FILE_UNIX_BASIC_INFO *info,
 133                                      struct cifs_sb_info *cifs_sb);
 134 extern void cifs_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr);
 135 extern struct inode *cifs_iget(struct super_block *sb,
 136                                struct cifs_fattr *fattr);
 137
 138 extern int cifs_get_file_info(struct file *filp);
 139 extern int cifs_get_inode_info(struct inode **pinode,
 140                         const unsigned char *search_path,
 141                         FILE_ALL_INFO *pfile_info,
 142                         struct super_block *sb, int xid, const __u16 *pfid);
 143 extern int cifs_get_file_info_unix(struct file *filp);
 144 extern int cifs_get_inode_info_unix(struct inode **pinode,
 145                         const unsigned char *search_path,
 146                         struct super_block *sb, int xid);
 147 extern int cifs_acl_to_fattr(struct cifs_sb_info *cifs_sb,
 148                               struct cifs_fattr *fattr, struct inode *inode,
 149                               const char *path, const __u16 *pfid);
 150 extern int id_mode_to_cifs_acl(struct inode *inode, const char *path, __u64,
 151                                         uid_t, gid_t);
 152 extern struct cifs_ntsd *get_cifs_acl(struct cifs_sb_info *, struct inode *,
 153                                         const char *, u32 *);
 154 extern int set_cifs_acl(struct cifs_ntsd *, __u32, struct inode *,
 155                                 const char *, int);
 156
 157 extern void cifs_setup_cifs_sb(struct smb_vol *pvolume_info,
 158                                struct cifs_sb_info *cifs_sb);
 159 extern int cifs_match_super(struct super_block *, void *);
 160 extern void cifs_cleanup_volume_info(struct smb_vol *pvolume_info);
 161 extern struct smb_vol *cifs_get_volume_info(char *mount_data,
 162                                             const char *devname);
 163 extern int cifs_mount(struct cifs_sb_info *, struct smb_vol *);
 164 extern void cifs_umount(struct cifs_sb_info *);
 165 extern void cifs_dfs_release_automount_timer(void);
 166 void cifs_proc_init(void);
 167 void cifs_proc_clean(void);
 168
 169 extern int cifs_negotiate_protocol(unsigned int xid,
 170                                   struct cifs_ses *ses);
 171 extern int cifs_setup_session(unsigned int xid, struct cifs_ses *ses,
 172                         struct nls_table *nls_info);
 173 extern int CIFSSMBNegotiate(unsigned int xid, struct cifs_ses *ses);
 174
 175 extern int CIFSTCon(unsigned int xid, struct cifs_ses *ses,
 176                         const char *tree, struct cifs_tcon *tcon,
 177                         const struct nls_table *);
 178
 179 extern int CIFSFindFirst(const int xid, struct cifs_tcon *tcon,
 180                 const char *searchName, const struct nls_table *nls_codepage,
 181                 __u16 *searchHandle, struct cifs_search_info *psrch_inf,
 182                 int map, const char dirsep);
 183
 184 extern int CIFSFindNext(const int xid, struct cifs_tcon *tcon,
 185                 __u16 searchHandle, struct cifs_search_info *psrch_inf);
 186
 187 extern int CIFSFindClose(const int, struct cifs_tcon *tcon,
 188                         const __u16 search_handle);
 189
 190 extern int CIFSSMBQFileInfo(const int xid, struct cifs_tcon *tcon,
 191                         u16 netfid, FILE_ALL_INFO *pFindData);
 192 extern int CIFSSMBQPathInfo(const int xid, struct cifs_tcon *tcon,
 193                         const unsigned char *searchName,
 194                         FILE_ALL_INFO *findData,
 195                         int legacy /* whether to use old info level */,
 196                         const struct nls_table *nls_codepage, int remap);
 197 extern int SMBQueryInformation(const int xid, struct cifs_tcon *tcon,
 198                         const unsigned char *searchName,
 199                         FILE_ALL_INFO *findData,
 200                         const struct nls_table *nls_codepage, int remap);
 201
 202 extern int CIFSSMBUnixQFileInfo(const int xid, struct cifs_tcon *tcon,
 203                         u16 netfid, FILE_UNIX_BASIC_INFO *pFindData);
 204 extern int CIFSSMBUnixQPathInfo(const int xid,
 205                         struct cifs_tcon *tcon,
 206                         const unsigned char *searchName,
 207                         FILE_UNIX_BASIC_INFO *pFindData,
 208                         const struct nls_table *nls_codepage, int remap);
 209
 210 extern int CIFSGetDFSRefer(const int xid, struct cifs_ses *ses,
 211                         const unsigned char *searchName,
 212                         struct dfs_info3_param **target_nodes,
 213                         unsigned int *number_of_nodes_in_array,
 214                         const struct nls_table *nls_codepage, int remap);
 215
 216 extern int get_dfs_path(int xid, struct cifs_ses *pSesInfo,
 217                         const char *old_path,
 218                         const struct nls_table *nls_codepage,
 219                         unsigned int *pnum_referrals,
 220                         struct dfs_info3_param **preferrals,
 221                         int remap);
 222 extern void reset_cifs_unix_caps(int xid, struct cifs_tcon *tcon,
 223                                  struct cifs_sb_info *cifs_sb,
 224                                  struct smb_vol *vol);
 225 extern int CIFSSMBQFSInfo(const int xid, struct cifs_tcon *tcon,
 226                         struct kstatfs *FSData);
 227 extern int SMBOldQFSInfo(const int xid, struct cifs_tcon *tcon,
 228                         struct kstatfs *FSData);
 229 extern int CIFSSMBSetFSUnixInfo(const int xid, struct cifs_tcon *tcon,
 230                         __u64 cap);
 231
 232 extern int CIFSSMBQFSAttributeInfo(const int xid,
 233                         struct cifs_tcon *tcon);
 234 extern int CIFSSMBQFSDeviceInfo(const int xid, struct cifs_tcon *tcon);
 235 extern int CIFSSMBQFSUnixInfo(const int xid, struct cifs_tcon *tcon);
 236 extern int CIFSSMBQFSPosixInfo(const int xid, struct cifs_tcon *tcon,
 237                         struct kstatfs *FSData);
 238
 239 extern int CIFSSMBSetPathInfo(const int xid, struct cifs_tcon *tcon,
 240                         const char *fileName, const FILE_BASIC_INFO *data,
 241                         const struct nls_table *nls_codepage,
 242                         int remap_special_chars);
 243 extern int CIFSSMBSetFileInfo(const int xid, struct cifs_tcon *tcon,
 244                         const FILE_BASIC_INFO *data, __u16 fid,
 245                         __u32 pid_of_opener);
 246 extern int CIFSSMBSetFileDisposition(const int xid, struct cifs_tcon *tcon,
 247                         bool delete_file, __u16 fid, __u32 pid_of_opener);
 248 #if 0
 249 extern int CIFSSMBSetAttrLegacy(int xid, struct cifs_tcon *tcon,
 250                         char *fileName, __u16 dos_attributes,
 251                         const struct nls_table *nls_codepage);
 252 #endif /* possibly unneeded function */
 253 extern int CIFSSMBSetEOF(const int xid, struct cifs_tcon *tcon,
 254                         const char *fileName, __u64 size,
 255                         bool setAllocationSizeFlag,
 256                         const struct nls_table *nls_codepage,
 257                         int remap_special_chars);
 258 extern int CIFSSMBSetFileSize(const int xid, struct cifs_tcon *tcon,
 259                          __u64 size, __u16 fileHandle, __u32 opener_pid,
 260                         bool AllocSizeFlag);
 261
 262 struct cifs_unix_set_info_args {
 263         __u64   ctime;
 264         __u64   atime;
 265         __u64   mtime;
 266         __u64   mode;
 267         __u64   uid;
 268         __u64   gid;
 269         dev_t   device;
 270 };
 271
 272 extern int CIFSSMBUnixSetFileInfo(const int xid, struct cifs_tcon *tcon,
 273                                   const struct cifs_unix_set_info_args *args,
 274                                   u16 fid, u32 pid_of_opener);
 275
 276 extern int CIFSSMBUnixSetPathInfo(const int xid, struct cifs_tcon *pTcon,
 277                         char *fileName,
 278                         const struct cifs_unix_set_info_args *args,
 279                         const struct nls_table *nls_codepage,
 280                         int remap_special_chars);
 281
 282 extern int CIFSSMBMkDir(const int xid, struct cifs_tcon *tcon,
 283                         const char *newName,
 284                         const struct nls_table *nls_codepage,
 285                         int remap_special_chars);
 286 extern int CIFSSMBRmDir(const int xid, struct cifs_tcon *tcon,
 287                         const char *name, const struct nls_table *nls_codepage,
 288                         int remap_special_chars);
 289 extern int CIFSPOSIXDelFile(const int xid, struct cifs_tcon *tcon,
 290                         const char *name, __u16 type,
 291                         const struct nls_table *nls_codepage,
 292                         int remap_special_chars);
 293 extern int CIFSSMBDelFile(const int xid, struct cifs_tcon *tcon,
 294                         const char *name,
 295                         const struct nls_table *nls_codepage,
 296                         int remap_special_chars);
 297 extern int CIFSSMBRename(const int xid, struct cifs_tcon *tcon,
 298                         const char *fromName, const char *toName,
 299                         const struct nls_table *nls_codepage,
 300                         int remap_special_chars);
 301 extern int CIFSSMBRenameOpenFile(const int xid, struct cifs_tcon *pTcon,
 302                         int netfid, const char *target_name,
 303                         const struct nls_table *nls_codepage,
 304                         int remap_special_chars);
 305 extern int CIFSCreateHardLink(const int xid,
 306                         struct cifs_tcon *tcon,
 307                         const char *fromName, const char *toName,
 308                         const struct nls_table *nls_codepage,
 309                         int remap_special_chars);
 310 extern int CIFSUnixCreateHardLink(const int xid,
 311                         struct cifs_tcon *tcon,
 312                         const char *fromName, const char *toName,
 313                         const struct nls_table *nls_codepage,
 314                         int remap_special_chars);
 315 extern int CIFSUnixCreateSymLink(const int xid,
 316                         struct cifs_tcon *tcon,
 317                         const char *fromName, const char *toName,
 318                         const struct nls_table *nls_codepage);
 319 extern int CIFSSMBUnixQuerySymLink(const int xid,
 320                         struct cifs_tcon *tcon,
 321                         const unsigned char *searchName, char **syminfo,
 322                         const struct nls_table *nls_codepage);
 323 #ifdef CONFIG_CIFS_SYMLINK_EXPERIMENTAL
 324 extern int CIFSSMBQueryReparseLinkInfo(const int xid,
 325                         struct cifs_tcon *tcon,
 326                         const unsigned char *searchName,
 327                         char *symlinkinfo, const int buflen, __u16 fid,
 328                         const struct nls_table *nls_codepage);
 329 #endif /* temporarily unused until cifs_symlink fixed */
 330 extern int CIFSSMBOpen(const int xid, struct cifs_tcon *tcon,
 331                         const char *fileName, const int disposition,
 332                         const int access_flags, const int omode,
 333                         __u16 *netfid, int *pOplock, FILE_ALL_INFO *,
 334                         const struct nls_table *nls_codepage, int remap);
 335 extern int SMBLegacyOpen(const int xid, struct cifs_tcon *tcon,
 336                         const char *fileName, const int disposition,
 337                         const int access_flags, const int omode,
 338                         __u16 *netfid, int *pOplock, FILE_ALL_INFO *,
 339                         const struct nls_table *nls_codepage, int remap);
 340 extern int CIFSPOSIXCreate(const int xid, struct cifs_tcon *tcon,
 341                         u32 posix_flags, __u64 mode, __u16 *netfid,
 342                         FILE_UNIX_BASIC_INFO *pRetData,
 343                         __u32 *pOplock, const char *name,
 344                         const struct nls_table *nls_codepage, int remap);
 345 extern int CIFSSMBClose(const int xid, struct cifs_tcon *tcon,
 346                         const int smb_file_id);
 347
 348 extern int CIFSSMBFlush(const int xid, struct cifs_tcon *tcon,
 349                         const int smb_file_id);
 350
 351 extern int CIFSSMBRead(const int xid, struct cifs_io_parms *io_parms,
 352                         unsigned int *nbytes, char **buf,
 353                         int *return_buf_type);
 354 extern int CIFSSMBWrite(const int xid, struct cifs_io_parms *io_parms,
 355                         unsigned int *nbytes, const char *buf,
 356                         const char __user *ubuf, const int long_op);
 357 extern int CIFSSMBWrite2(const int xid, struct cifs_io_parms *io_parms,
 358                         unsigned int *nbytes, struct kvec *iov, const int nvec,
 359                         const int long_op);
 360 extern int CIFSGetSrvInodeNumber(const int xid, struct cifs_tcon *tcon,
 361                         const unsigned char *searchName, __u64 *inode_number,
 362                         const struct nls_table *nls_codepage,
 363                         int remap_special_chars);
 364
 365 extern int CIFSSMBLock(const int xid, struct cifs_tcon *tcon,
 366                         const __u16 netfid, const __u32 netpid, const __u64 len,
 367                         const __u64 offset, const __u32 numUnlock,
 368                         const __u32 numLock, const __u8 lockType,
 369                         const bool waitFlag, const __u8 oplock_level);
 370 extern int CIFSSMBPosixLock(const int xid, struct cifs_tcon *tcon,
 371                         const __u16 smb_file_id, const int get_flag,
 372                         const __u64 len, struct file_lock *,
 373                         const __u16 lock_type, const bool waitFlag);
 374 extern int CIFSSMBTDis(const int xid, struct cifs_tcon *tcon);
 375 extern int CIFSSMBEcho(struct TCP_Server_Info *server);
 376 extern int CIFSSMBLogoff(const int xid, struct cifs_ses *ses);
 377
 378 extern struct cifs_ses *sesInfoAlloc(void);
 379 extern void sesInfoFree(struct cifs_ses *);
 380 extern struct cifs_tcon *tconInfoAlloc(void);
 381 extern void tconInfoFree(struct cifs_tcon *);
 382
 383 extern int cifs_sign_smb(struct smb_hdr *, struct TCP_Server_Info *, __u32 *);
 384 extern int cifs_sign_smb2(struct kvec *iov, int n_vec, struct TCP_Server_Info *,
 385                           __u32 *);
 386 extern int cifs_verify_signature(struct kvec *iov, unsigned int nr_iov,
 387                                  struct TCP_Server_Info *server,
 388                                 __u32 expected_sequence_number);
 389 extern int SMBNTencrypt(unsigned char *, unsigned char *, unsigned char *);
 390 extern int setup_ntlm_response(struct cifs_ses *);
 391 extern int setup_ntlmv2_rsp(struct cifs_ses *, const struct nls_table *);
 392 extern int cifs_crypto_shash_allocate(struct TCP_Server_Info *);
 393 extern void cifs_crypto_shash_release(struct TCP_Server_Info *);
 394 extern int calc_seckey(struct cifs_ses *);
 395
 396 #ifdef CONFIG_CIFS_WEAK_PW_HASH
 397 extern int calc_lanman_hash(const char *password, const char *cryptkey,
 398                                 bool encrypt, char *lnm_session_key);
 399 #endif /* CIFS_WEAK_PW_HASH */
 400 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
 401 extern int CIFSSMBNotify(const int xid, struct cifs_tcon *tcon,
 402                         const int notify_subdirs, const __u16 netfid,
 403                         __u32 filter, struct file *file, int multishot,
 404                         const struct nls_table *nls_codepage);
 405 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
 406 extern int CIFSSMBCopy(int xid,
 407                         struct cifs_tcon *source_tcon,
 408                         const char *fromName,
 409                         const __u16 target_tid,
 410                         const char *toName, const int flags,
 411                         const struct nls_table *nls_codepage,
 412                         int remap_special_chars);
 413 extern ssize_t CIFSSMBQAllEAs(const int xid, struct cifs_tcon *tcon,
 414                         const unsigned char *searchName,
 415                         const unsigned char *ea_name, char *EAData,
 416                         size_t bufsize, const struct nls_table *nls_codepage,
 417                         int remap_special_chars);
 418 extern int CIFSSMBSetEA(const int xid, struct cifs_tcon *tcon,
 419                 const char *fileName, const char *ea_name,
 420                 const void *ea_value, const __u16 ea_value_len,
 421                 const struct nls_table *nls_codepage, int remap_special_chars);
 422 extern int CIFSSMBGetCIFSACL(const int xid, struct cifs_tcon *tcon,
 423                         __u16 fid, struct cifs_ntsd **acl_inf, __u32 *buflen);
 424 extern int CIFSSMBSetCIFSACL(const int, struct cifs_tcon *, __u16,
 425                         struct cifs_ntsd *, __u32, int);
 426 extern int CIFSSMBGetPosixACL(const int xid, struct cifs_tcon *tcon,
 427                 const unsigned char *searchName,
 428                 char *acl_inf, const int buflen, const int acl_type,
 429                 const struct nls_table *nls_codepage, int remap_special_chars);
 430 extern int CIFSSMBSetPosixACL(const int xid, struct cifs_tcon *tcon,
 431                 const unsigned char *fileName,
 432                 const char *local_acl, const int buflen, const int acl_type,
 433                 const struct nls_table *nls_codepage, int remap_special_chars);
 434 extern int CIFSGetExtAttr(const int xid, struct cifs_tcon *tcon,
 435                         const int netfid, __u64 *pExtAttrBits, __u64 *pMask);
 436 extern void cifs_autodisable_serverino(struct cifs_sb_info *cifs_sb);
 437 extern bool CIFSCouldBeMFSymlink(const struct cifs_fattr *fattr);
 438 extern int CIFSCheckMFSymlink(struct cifs_fattr *fattr,
 439                 const unsigned char *path,
 440                 struct cifs_sb_info *cifs_sb, int xid);
 441 extern int mdfour(unsigned char *, unsigned char *, int);
 442 extern int E_md4hash(const unsigned char *passwd, unsigned char *p16);
 443 extern int SMBencrypt(unsigned char *passwd, const unsigned char *c8,
 444                         unsigned char *p24);
 445
 446 /* asynchronous write support */
 447 struct cifs_writedata {
 448         struct kref                     refcount;
 449         enum writeback_sync_modes       sync_mode;
 450         struct work_struct              work;
 451         struct cifsFileInfo             *cfile;
 452         __u64                           offset;
 453         unsigned int                    bytes;
 454         int                             result;
 455         unsigned int                    nr_pages;
 456         struct page                     *pages[1];
 457 };
 458
 459 int cifs_async_writev(struct cifs_writedata *wdata);
 460 struct cifs_writedata *cifs_writedata_alloc(unsigned int nr_pages);
 461 void cifs_writedata_release(struct kref *refcount);
 462
 463 #endif                  /* _CIFSPROTO_H */