include/linux/coda.h

   1 /*
   2    You may distribute this file under either of the two licenses that
   3    follow at your discretion.
   4 */
   5
   6 /* BLURB lgpl
   7
   8                            Coda File System
   9                               Release 5
  10
  11           Copyright (c) 1987-1999 Carnegie Mellon University
  12                   Additional copyrights listed below
  13
  14 This code is distributed "AS IS" without warranty of any kind under
  15 the terms of the GNU Library General Public Licence Version 2, as
  16 shown in the file LICENSE, or under the license shown below. The
  17 technical and financial contributors to Coda are listed in the file
  18 CREDITS.
  19
  20                         Additional copyrights
  21 */
  22
  23 /*
  24
  25             Coda: an Experimental Distributed File System
  26                              Release 4.0
  27
  28           Copyright (c) 1987-1999 Carnegie Mellon University
  29                          All Rights Reserved
  30
  31 Permission  to  use, copy, modify and distribute this software and its
  32 documentation is hereby granted,  provided  that  both  the  copyright
  33 notice  and  this  permission  notice  appear  in  all  copies  of the
  34 software, derivative works or  modified  versions,  and  any  portions
  35 thereof, and that both notices appear in supporting documentation, and
  36 that credit is given to Carnegie Mellon University  in  all  documents
  37 and publicity pertaining to direct or indirect use of this code or its
  38 derivatives.
  39
  40 CODA IS AN EXPERIMENTAL SOFTWARE SYSTEM AND IS  KNOWN  TO  HAVE  BUGS,
  41 SOME  OF  WHICH MAY HAVE SERIOUS CONSEQUENCES.  CARNEGIE MELLON ALLOWS
  42 FREE USE OF THIS SOFTWARE IN ITS "AS IS" CONDITION.   CARNEGIE  MELLON
  43 DISCLAIMS  ANY  LIABILITY  OF  ANY  KIND  FOR  ANY  DAMAGES WHATSOEVER
  44 RESULTING DIRECTLY OR INDIRECTLY FROM THE USE OF THIS SOFTWARE  OR  OF
  45 ANY DERIVATIVE WORK.
  46
  47 Carnegie  Mellon  encourages  users  of  this  software  to return any
  48 improvements or extensions that  they  make,  and  to  grant  Carnegie
  49 Mellon the rights to redistribute these changes without encumbrance.
  50 */
  51
  52 /*
  53  *
  54  * Based on cfs.h from Mach, but revamped for increased simplicity.
  55  * Linux modifications by
  56  * Peter Braam, Aug 1996
  57  */
  58
  59 #ifndef _CODA_HEADER_
  60 #define _CODA_HEADER_
  61
  62
  63 /* Catch new _KERNEL defn for NetBSD and DJGPP/__CYGWIN32__ */
  64 #if defined(__NetBSD__) || \
  65   ((defined(DJGPP) || defined(__CYGWIN32__)) && !defined(KERNEL))
  66 #include <sys/types.h>
  67 #endif
  68
  69 #ifndef CODA_MAXSYMLINKS
  70 #define CODA_MAXSYMLINKS 10
  71 #endif
  72
  73 #if defined(DJGPP) || defined(__CYGWIN32__)
  74 #ifdef KERNEL
  75 typedef unsigned long u_long;
  76 typedef unsigned int u_int;
  77 typedef unsigned short u_short;
  78 typedef u_long ino_t;
  79 typedef u_long dev_t;
  80 typedef void * caddr_t;
  81 #ifdef DOS
  82 typedef unsigned __int64 u_quad_t;
  83 #else
  84 typedef unsigned long long u_quad_t;
  85 #endif
  86
  87 #define inline
  88
  89 struct timespec {
  90         long       ts_sec;
  91         long       ts_nsec;
  92 };
  93 #else  /* DJGPP but not KERNEL */
  94 #include <sys/time.h>
  95 typedef unsigned long long u_quad_t;
  96 #endif /* !KERNEL */
  97 #endif /* !DJGPP */
  98
  99
 100 #if defined(__linux__)
 101 #include <linux/time.h>
 102 #define cdev_t u_quad_t
 103 #ifndef __KERNEL__
 104 #if !defined(_UQUAD_T_) && (!defined(__GLIBC__) || __GLIBC__ < 2)
 105 #define _UQUAD_T_ 1
 106 typedef unsigned long long u_quad_t;
 107 #endif
 108 #else /*__KERNEL__ */
 109 typedef unsigned long long u_quad_t;
 110 #endif /* __KERNEL__ */
 111 #else
 112 #define cdev_t dev_t
 113 #endif
 114
 115 #ifdef __CYGWIN32__
 116 struct timespec {
 117         time_t  tv_sec;         /* seconds */
 118         long    tv_nsec;        /* nanoseconds */
 119 };
 120 #endif
 121
 122 #ifndef __BIT_TYPES_DEFINED__
 123 #define __BIT_TYPES_DEFINED__
 124 typedef signed char           int8_t;
 125 typedef unsigned char       u_int8_t;
 126 typedef short                int16_t;
 127 typedef unsigned short     u_int16_t;
 128 typedef int                  int32_t;
 129 typedef unsigned int       u_int32_t;
 130 #endif
 131
 132
 133 /*
 134  * Cfs constants
 135  */
 136 #define CODA_MAXNAMLEN   255
 137 #define CODA_MAXPATHLEN  1024
 138 #define CODA_MAXSYMLINK  10
 139
 140 /* these are Coda's version of O_RDONLY etc combinations
 141  * to deal with VFS open modes
 142  */
 143 #define C_O_READ        0x001
 144 #define C_O_WRITE       0x002
 145 #define C_O_TRUNC       0x010
 146 #define C_O_EXCL        0x100
 147 #define C_O_CREAT       0x200
 148
 149 /* these are to find mode bits in Venus */
 150 #define C_M_READ  00400
 151 #define C_M_WRITE 00200
 152
 153 /* for access Venus will use */
 154 #define C_A_C_OK    8               /* Test for writing upon create.  */
 155 #define C_A_R_OK    4               /* Test for read permission.  */
 156 #define C_A_W_OK    2               /* Test for write permission.  */
 157 #define C_A_X_OK    1               /* Test for execute permission.  */
 158 #define C_A_F_OK    0               /* Test for existence.  */
 159
 160
 161
 162 #ifndef _VENUS_DIRENT_T_
 163 #define _VENUS_DIRENT_T_ 1
 164 struct venus_dirent {
 165         u_int32_t d_fileno;             /* file number of entry */
 166         u_int16_t d_reclen;             /* length of this record */
 167         u_int8_t  d_type;                       /* file type, see below */
 168         u_int8_t  d_namlen;             /* length of string in d_name */
 169         char      d_name[CODA_MAXNAMLEN + 1];/* name must be no longer than this */
 170 };
 171 #undef DIRSIZ
 172 #define DIRSIZ(dp)      ((sizeof (struct venus_dirent) - (CODA_MAXNAMLEN+1)) + \
 173                          (((dp)->d_namlen+1 + 3) &~ 3))
 174
 175 /*
 176  * File types
 177  */
 178 #define CDT_UNKNOWN      0
 179 #define CDT_FIFO         1
 180 #define CDT_CHR          2
 181 #define CDT_DIR          4
 182 #define CDT_BLK          6
 183 #define CDT_REG          8
 184 #define CDT_LNK         10
 185 #define CDT_SOCK        12
 186 #define CDT_WHT         14
 187
 188 /*
 189  * Convert between stat structure types and directory types.
 190  */
 191 #define IFTOCDT(mode)   (((mode) & 0170000) >> 12)
 192 #define CDTTOIF(dirtype)        ((dirtype) << 12)
 193
 194 #endif
 195
 196 #ifndef _VUID_T_
 197 #define _VUID_T_
 198 typedef u_int32_t vuid_t;
 199 typedef u_int32_t vgid_t;
 200 #endif /*_VUID_T_ */
 201
 202 struct CodaFid {
 203         u_int32_t opaque[4];
 204 };
 205
 206 #define coda_f2i(fid)\
 207         (fid ? (fid->opaque[3] ^ (fid->opaque[2]<<10) ^ (fid->opaque[1]<<20) ^ fid->opaque[0]) : 0)
 208
 209 #ifndef _VENUS_VATTR_T_
 210 #define _VENUS_VATTR_T_
 211 /*
 212  * Vnode types.  VNON means no type.
 213  */
 214 enum coda_vtype { C_VNON, C_VREG, C_VDIR, C_VBLK, C_VCHR, C_VLNK, C_VSOCK, C_VFIFO, C_VBAD };
 215
 216 struct coda_vattr {
 217         long            va_type;        /* vnode type (for create) */
 218         u_short         va_mode;        /* files access mode and type */
 219         short           va_nlink;       /* number of references to file */
 220         vuid_t          va_uid;         /* owner user id */
 221         vgid_t          va_gid;         /* owner group id */
 222         long            va_fileid;      /* file id */
 223         u_quad_t        va_size;        /* file size in bytes */
 224         long            va_blocksize;   /* blocksize preferred for i/o */
 225         struct timespec va_atime;       /* time of last access */
 226         struct timespec va_mtime;       /* time of last modification */
 227         struct timespec va_ctime;       /* time file changed */
 228         u_long          va_gen;         /* generation number of file */
 229         u_long          va_flags;       /* flags defined for file */
 230         cdev_t          va_rdev;        /* device special file represents */
 231         u_quad_t        va_bytes;       /* bytes of disk space held by file */
 232         u_quad_t        va_filerev;     /* file modification number */
 233 };
 234
 235 #endif
 236
 237 /* structure used by CODA_STATFS for getting cache information from venus */
 238 struct coda_statfs {
 239     int32_t f_blocks;
 240     int32_t f_bfree;
 241     int32_t f_bavail;
 242     int32_t f_files;
 243     int32_t f_ffree;
 244 };
 245
 246 /*
 247  * Kernel <--> Venus communications.
 248  */
 249
 250 #define CODA_ROOT       2
 251 #define CODA_OPEN_BY_FD 3
 252 #define CODA_OPEN       4
 253 #define CODA_CLOSE      5
 254 #define CODA_IOCTL      6
 255 #define CODA_GETATTR    7
 256 #define CODA_SETATTR    8
 257 #define CODA_ACCESS     9
 258 #define CODA_LOOKUP     10
 259 #define CODA_CREATE     11
 260 #define CODA_REMOVE     12
 261 #define CODA_LINK       13
 262 #define CODA_RENAME     14
 263 #define CODA_MKDIR      15
 264 #define CODA_RMDIR      16
 265 #define CODA_SYMLINK    18
 266 #define CODA_READLINK   19
 267 #define CODA_FSYNC      20
 268 #define CODA_VGET       22
 269 #define CODA_SIGNAL     23
 270 #define CODA_REPLACE     24 /* DOWNCALL */
 271 #define CODA_FLUSH       25 /* DOWNCALL */
 272 #define CODA_PURGEUSER   26 /* DOWNCALL */
 273 #define CODA_ZAPFILE     27 /* DOWNCALL */
 274 #define CODA_ZAPDIR      28 /* DOWNCALL */
 275 #define CODA_PURGEFID    30 /* DOWNCALL */
 276 #define CODA_OPEN_BY_PATH 31
 277 #define CODA_RESOLVE     32
 278 #define CODA_REINTEGRATE 33
 279 #define CODA_STATFS      34
 280 #define CODA_STORE       35
 281 #define CODA_RELEASE     36
 282 #define CODA_NCALLS 37
 283
 284 #define DOWNCALL(opcode) (opcode >= CODA_REPLACE && opcode <= CODA_PURGEFID)
 285
 286 #define VC_MAXDATASIZE      8192
 287 #define VC_MAXMSGSIZE      sizeof(union inputArgs)+sizeof(union outputArgs) +\
 288                             VC_MAXDATASIZE
 289
 290 #define CIOC_KERNEL_VERSION _IOWR('c', 10, size_t)
 291
 292 #define CODA_KERNEL_VERSION 3 /* 128-bit file identifiers */
 293
 294 /*
 295  *        Venus <-> Coda  RPC arguments
 296  */
 297 struct coda_in_hdr {
 298     u_int32_t opcode;
 299     u_int32_t unique;       /* Keep multiple outstanding msgs distinct */
 300     pid_t pid;
 301     pid_t pgid;
 302     vuid_t uid;
 303 };
 304
 305 /* Really important that opcode and unique are 1st two fields! */
 306 struct coda_out_hdr {
 307     u_int32_t opcode;
 308     u_int32_t unique;
 309     u_int32_t result;
 310 };
 311
 312 /* coda_root: NO_IN */
 313 struct coda_root_out {
 314     struct coda_out_hdr oh;
 315     struct CodaFid VFid;
 316 };
 317
 318 struct coda_root_in {
 319     struct coda_in_hdr in;
 320 };
 321
 322 /* coda_open: */
 323 struct coda_open_in {
 324     struct coda_in_hdr ih;
 325     struct CodaFid VFid;
 326     int flags;
 327 };
 328
 329 struct coda_open_out {
 330     struct coda_out_hdr oh;
 331     cdev_t      dev;
 332     ino_t       inode;
 333 };
 334
 335
 336 /* coda_store: */
 337 struct coda_store_in {
 338     struct coda_in_hdr ih;
 339     struct CodaFid VFid;
 340     int flags;
 341 };
 342
 343 struct coda_store_out {
 344     struct coda_out_hdr out;
 345 };
 346
 347 /* coda_release: */
 348 struct coda_release_in {
 349     struct coda_in_hdr ih;
 350     struct CodaFid VFid;
 351     int flags;
 352 };
 353
 354 struct coda_release_out {
 355     struct coda_out_hdr out;
 356 };
 357
 358 /* coda_close: */
 359 struct coda_close_in {
 360     struct coda_in_hdr ih;
 361     struct CodaFid VFid;
 362     int flags;
 363 };
 364
 365 struct coda_close_out {
 366     struct coda_out_hdr out;
 367 };
 368
 369 /* coda_ioctl: */
 370 struct coda_ioctl_in {
 371     struct coda_in_hdr ih;
 372     struct CodaFid VFid;
 373     int cmd;
 374     int len;
 375     int rwflag;
 376     char *data;                 /* Place holder for data. */
 377 };
 378
 379 struct coda_ioctl_out {
 380     struct coda_out_hdr oh;
 381     int len;
 382     caddr_t     data;           /* Place holder for data. */
 383 };
 384
 385
 386 /* coda_getattr: */
 387 struct coda_getattr_in {
 388     struct coda_in_hdr ih;
 389     struct CodaFid VFid;
 390 };
 391
 392 struct coda_getattr_out {
 393     struct coda_out_hdr oh;
 394     struct coda_vattr attr;
 395 };
 396
 397
 398 /* coda_setattr: NO_OUT */
 399 struct coda_setattr_in {
 400     struct coda_in_hdr ih;
 401     struct CodaFid VFid;
 402     struct coda_vattr attr;
 403 };
 404
 405 struct coda_setattr_out {
 406     struct coda_out_hdr out;
 407 };
 408
 409 /* coda_access: NO_OUT */
 410 struct coda_access_in {
 411     struct coda_in_hdr ih;
 412     struct CodaFid VFid;
 413     int flags;
 414 };
 415
 416 struct coda_access_out {
 417     struct coda_out_hdr out;
 418 };
 419
 420
 421 /* lookup flags */
 422 #define CLU_CASE_SENSITIVE     0x01
 423 #define CLU_CASE_INSENSITIVE   0x02
 424
 425 /* coda_lookup: */
 426 struct  coda_lookup_in {
 427     struct coda_in_hdr ih;
 428     struct CodaFid VFid;
 429     int         name;           /* Place holder for data. */
 430     int         flags;
 431 };
 432
 433 struct coda_lookup_out {
 434     struct coda_out_hdr oh;
 435     struct CodaFid VFid;
 436     int vtype;
 437 };
 438
 439
 440 /* coda_create: */
 441 struct coda_create_in {
 442     struct coda_in_hdr ih;
 443     struct CodaFid VFid;
 444     struct coda_vattr attr;
 445     int excl;
 446     int mode;
 447     int         name;           /* Place holder for data. */
 448 };
 449
 450 struct coda_create_out {
 451     struct coda_out_hdr oh;
 452     struct CodaFid VFid;
 453     struct coda_vattr attr;
 454 };
 455
 456
 457 /* coda_remove: NO_OUT */
 458 struct coda_remove_in {
 459     struct coda_in_hdr ih;
 460     struct CodaFid VFid;
 461     int name;           /* Place holder for data. */
 462 };
 463
 464 struct coda_remove_out {
 465     struct coda_out_hdr out;
 466 };
 467
 468 /* coda_link: NO_OUT */
 469 struct coda_link_in {
 470     struct coda_in_hdr ih;
 471     struct CodaFid sourceFid;   /* cnode to link *to* */
 472     struct CodaFid destFid;     /* Directory in which to place link */
 473     int tname;          /* Place holder for data. */
 474 };
 475
 476 struct coda_link_out {
 477     struct coda_out_hdr out;
 478 };
 479
 480
 481 /* coda_rename: NO_OUT */
 482 struct coda_rename_in {
 483     struct coda_in_hdr ih;
 484     struct CodaFid sourceFid;
 485     int         srcname;
 486     struct CodaFid destFid;
 487     int         destname;
 488 };
 489
 490 struct coda_rename_out {
 491     struct coda_out_hdr out;
 492 };
 493
 494 /* coda_mkdir: */
 495 struct coda_mkdir_in {
 496     struct coda_in_hdr ih;
 497     struct CodaFid VFid;
 498     struct coda_vattr attr;
 499     int    name;                /* Place holder for data. */
 500 };
 501
 502 struct coda_mkdir_out {
 503     struct coda_out_hdr oh;
 504     struct CodaFid VFid;
 505     struct coda_vattr attr;
 506 };
 507
 508
 509 /* coda_rmdir: NO_OUT */
 510 struct coda_rmdir_in {
 511     struct coda_in_hdr ih;
 512     struct CodaFid VFid;
 513     int name;           /* Place holder for data. */
 514 };
 515
 516 struct coda_rmdir_out {
 517     struct coda_out_hdr out;
 518 };
 519
 520 /* coda_symlink: NO_OUT */
 521 struct coda_symlink_in {
 522     struct coda_in_hdr ih;
 523     struct CodaFid VFid;        /* Directory to put symlink in */
 524     int srcname;
 525     struct coda_vattr attr;
 526     int tname;
 527 };
 528
 529 struct coda_symlink_out {
 530     struct coda_out_hdr out;
 531 };
 532
 533 /* coda_readlink: */
 534 struct coda_readlink_in {
 535     struct coda_in_hdr ih;
 536     struct CodaFid VFid;
 537 };
 538
 539 struct coda_readlink_out {
 540     struct coda_out_hdr oh;
 541     int count;
 542     caddr_t     data;           /* Place holder for data. */
 543 };
 544
 545
 546 /* coda_fsync: NO_OUT */
 547 struct coda_fsync_in {
 548     struct coda_in_hdr ih;
 549     struct CodaFid VFid;
 550 };
 551
 552 struct coda_fsync_out {
 553     struct coda_out_hdr out;
 554 };
 555
 556 /* coda_vget: */
 557 struct coda_vget_in {
 558     struct coda_in_hdr ih;
 559     struct CodaFid VFid;
 560 };
 561
 562 struct coda_vget_out {
 563     struct coda_out_hdr oh;
 564     struct CodaFid VFid;
 565     int vtype;
 566 };
 567
 568
 569 /* CODA_SIGNAL is out-of-band, doesn't need data. */
 570 /* CODA_INVALIDATE is a venus->kernel call */
 571 /* CODA_FLUSH is a venus->kernel call */
 572
 573 /* coda_purgeuser: */
 574 /* CODA_PURGEUSER is a venus->kernel call */
 575 struct coda_purgeuser_out {
 576     struct coda_out_hdr oh;
 577     vuid_t uid;
 578 };
 579
 580 /* coda_zapfile: */
 581 /* CODA_ZAPFILE is a venus->kernel call */
 582 struct coda_zapfile_out {
 583     struct coda_out_hdr oh;
 584     struct CodaFid CodaFid;
 585 };
 586
 587 /* coda_zapdir: */
 588 /* CODA_ZAPDIR is a venus->kernel call */
 589 struct coda_zapdir_out {
 590     struct coda_out_hdr oh;
 591     struct CodaFid CodaFid;
 592 };
 593
 594 /* coda_purgefid: */
 595 /* CODA_PURGEFID is a venus->kernel call */
 596 struct coda_purgefid_out {
 597     struct coda_out_hdr oh;
 598     struct CodaFid CodaFid;
 599 };
 600
 601 /* coda_replace: */
 602 /* CODA_REPLACE is a venus->kernel call */
 603 struct coda_replace_out { /* coda_replace is a venus->kernel call */
 604     struct coda_out_hdr oh;
 605     struct CodaFid NewFid;
 606     struct CodaFid OldFid;
 607 };
 608
 609 /* coda_open_by_fd: */
 610 struct coda_open_by_fd_in {
 611     struct coda_in_hdr ih;
 612     struct CodaFid VFid;
 613     int        flags;
 614 };
 615
 616 struct coda_open_by_fd_out {
 617     struct coda_out_hdr oh;
 618     int fd;
 619
 620 #ifdef __KERNEL__
 621     struct file *fh; /* not passed from userspace but used in-kernel only */
 622 #endif
 623 };
 624
 625 /* coda_open_by_path: */
 626 struct coda_open_by_path_in {
 627     struct coda_in_hdr ih;
 628     struct CodaFid VFid;
 629     int flags;
 630 };
 631
 632 struct coda_open_by_path_out {
 633     struct coda_out_hdr oh;
 634         int path;
 635 };
 636
 637 /* coda_statfs: NO_IN */
 638 struct coda_statfs_in {
 639     struct coda_in_hdr in;
 640 };
 641
 642 struct coda_statfs_out {
 643     struct coda_out_hdr oh;
 644     struct coda_statfs stat;
 645 };
 646
 647 /*
 648  * Occasionally, we don't cache the fid returned by CODA_LOOKUP.
 649  * For instance, if the fid is inconsistent.
 650  * This case is handled by setting the top bit of the type result parameter.
 651  */
 652 #define CODA_NOCACHE          0x80000000
 653
 654 union inputArgs {
 655     struct coda_in_hdr ih;              /* NB: every struct below begins with an ih */
 656     struct coda_open_in coda_open;
 657     struct coda_store_in coda_store;
 658     struct coda_release_in coda_release;
 659     struct coda_close_in coda_close;
 660     struct coda_ioctl_in coda_ioctl;
 661     struct coda_getattr_in coda_getattr;
 662     struct coda_setattr_in coda_setattr;
 663     struct coda_access_in coda_access;
 664     struct coda_lookup_in coda_lookup;
 665     struct coda_create_in coda_create;
 666     struct coda_remove_in coda_remove;
 667     struct coda_link_in coda_link;
 668     struct coda_rename_in coda_rename;
 669     struct coda_mkdir_in coda_mkdir;
 670     struct coda_rmdir_in coda_rmdir;
 671     struct coda_symlink_in coda_symlink;
 672     struct coda_readlink_in coda_readlink;
 673     struct coda_fsync_in coda_fsync;
 674     struct coda_vget_in coda_vget;
 675     struct coda_open_by_fd_in coda_open_by_fd;
 676     struct coda_open_by_path_in coda_open_by_path;
 677     struct coda_statfs_in coda_statfs;
 678 };
 679
 680 union outputArgs {
 681     struct coda_out_hdr oh;             /* NB: every struct below begins with an oh */
 682     struct coda_root_out coda_root;
 683     struct coda_open_out coda_open;
 684     struct coda_ioctl_out coda_ioctl;
 685     struct coda_getattr_out coda_getattr;
 686     struct coda_lookup_out coda_lookup;
 687     struct coda_create_out coda_create;
 688     struct coda_mkdir_out coda_mkdir;
 689     struct coda_readlink_out coda_readlink;
 690     struct coda_vget_out coda_vget;
 691     struct coda_purgeuser_out coda_purgeuser;
 692     struct coda_zapfile_out coda_zapfile;
 693     struct coda_zapdir_out coda_zapdir;
 694     struct coda_purgefid_out coda_purgefid;
 695     struct coda_replace_out coda_replace;
 696     struct coda_open_by_fd_out coda_open_by_fd;
 697     struct coda_open_by_path_out coda_open_by_path;
 698     struct coda_statfs_out coda_statfs;
 699 };
 700
 701 union coda_downcalls {
 702     /* CODA_INVALIDATE is a venus->kernel call */
 703     /* CODA_FLUSH is a venus->kernel call */
 704     struct coda_purgeuser_out purgeuser;
 705     struct coda_zapfile_out zapfile;
 706     struct coda_zapdir_out zapdir;
 707     struct coda_purgefid_out purgefid;
 708     struct coda_replace_out replace;
 709 };
 710
 711
 712 /*
 713  * Used for identifying usage of "Control" and pioctls
 714  */
 715
 716 #define PIOCPARM_MASK 0x0000ffff
 717 struct ViceIoctl {
 718         void __user *in;        /* Data to be transferred in */
 719         void __user *out;       /* Data to be transferred out */
 720         u_short in_size;        /* Size of input buffer <= 2K */
 721         u_short out_size;       /* Maximum size of output buffer, <= 2K */
 722 };
 723
 724 struct PioctlData {
 725         const char __user *path;
 726         int follow;
 727         struct ViceIoctl vi;
 728 };
 729
 730 #define CODA_CONTROL            ".CONTROL"
 731 #define CODA_CONTROLLEN         8
 732 #define CTL_INO                 -1
 733
 734 /* Data passed to mount */
 735
 736 #define CODA_MOUNT_VERSION 1
 737
 738 struct coda_mount_data {
 739         int             version;
 740         int             fd;       /* Opened device */
 741 };
 742
 743 #endif
 744