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
  64 /* Catch new _KERNEL defn for NetBSD and DJGPP/__CYGWIN32__ */
  65 #if defined(__NetBSD__) || \
  66   ((defined(DJGPP) || defined(__CYGWIN32__)) && !defined(KERNEL))
  67 #include <sys/types.h>
  68 #endif
  69
  70 #ifndef CODA_MAXSYMLINKS
  71 #define CODA_MAXSYMLINKS 10
  72 #endif
  73
  74 #if defined(DJGPP) || defined(__CYGWIN32__)
  75 #ifdef KERNEL
  76 typedef unsigned long u_long;
  77 typedef unsigned int u_int;
  78 typedef unsigned short u_short;
  79 typedef u_long ino_t;
  80 typedef u_long dev_t;
  81 typedef void * caddr_t;
  82 #ifdef DOS
  83 typedef unsigned __int64 u_quad_t;
  84 #else
  85 typedef unsigned long long u_quad_t;
  86 #endif
  87
  88 #define inline
  89
  90 struct timespec {
  91         long       ts_sec;
  92         long       ts_nsec;
  93 };
  94 #else  /* DJGPP but not KERNEL */
  95 #include <sys/time.h>
  96 typedef unsigned long long u_quad_t;
  97 #endif /* !KERNEL */
  98 #endif /* !DJGPP */
  99
 100
 101 #if defined(__linux__)
 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         unsigned long   d_fileno;               /* file number of entry */
 166         unsigned short  d_reclen;               /* length of this record */
 167         unsigned char   d_type;                 /* file type, see below */
 168         unsigned char   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 _FID_T_
 197 #define _FID_T_ 1
 198 typedef u_long VolumeId;
 199 typedef u_long VnodeId;
 200 typedef u_long Unique_t;
 201 typedef u_long FileVersion;
 202 #endif
 203
 204 #ifndef _VICEFID_T_
 205 #define _VICEFID_T_     1
 206 typedef struct ViceFid {
 207     VolumeId Volume;
 208     VnodeId Vnode;
 209     Unique_t Unique;
 210 } ViceFid;
 211 #endif  /* VICEFID */
 212
 213
 214 #ifdef __linux__
 215 static __inline__ ino_t  coda_f2i(struct ViceFid *fid)
 216 {
 217         if ( ! fid )
 218                 return 0;
 219         if (fid->Vnode == 0xfffffffe || fid->Vnode == 0xffffffff)
 220                 return ((fid->Volume << 20) | (fid->Unique & 0xfffff));
 221         else
 222                 return (fid->Unique + (fid->Vnode<<10) + (fid->Volume<<20));
 223 }
 224
 225 #else
 226 #define coda_f2i(fid)\
 227         ((fid) ? ((fid)->Unique + ((fid)->Vnode<<10) + ((fid)->Volume<<20)) : 0)
 228 #endif
 229
 230
 231 #ifndef _VUID_T_
 232 #define _VUID_T_
 233 typedef u_int32_t vuid_t;
 234 typedef u_int32_t vgid_t;
 235 #endif /*_VUID_T_ */
 236
 237 #ifndef _CODACRED_T_
 238 #define _CODACRED_T_
 239 struct coda_cred {
 240     vuid_t cr_uid, cr_euid, cr_suid, cr_fsuid; /* Real, efftve, set, fs uid*/
 241     vgid_t cr_groupid,     cr_egid, cr_sgid, cr_fsgid; /* same for groups */
 242 };
 243 #endif
 244
 245 #ifndef _VENUS_VATTR_T_
 246 #define _VENUS_VATTR_T_
 247 /*
 248  * Vnode types.  VNON means no type.
 249  */
 250 enum coda_vtype { C_VNON, C_VREG, C_VDIR, C_VBLK, C_VCHR, C_VLNK, C_VSOCK, C_VFIFO, C_VBAD };
 251
 252 struct coda_vattr {
 253         long            va_type;        /* vnode type (for create) */
 254         u_short         va_mode;        /* files access mode and type */
 255         short           va_nlink;       /* number of references to file */
 256         vuid_t          va_uid;         /* owner user id */
 257         vgid_t          va_gid;         /* owner group id */
 258         long            va_fileid;      /* file id */
 259         u_quad_t        va_size;        /* file size in bytes */
 260         long            va_blocksize;   /* blocksize preferred for i/o */
 261         struct timespec va_atime;       /* time of last access */
 262         struct timespec va_mtime;       /* time of last modification */
 263         struct timespec va_ctime;       /* time file changed */
 264         u_long          va_gen;         /* generation number of file */
 265         u_long          va_flags;       /* flags defined for file */
 266         cdev_t          va_rdev;        /* device special file represents */
 267         u_quad_t        va_bytes;       /* bytes of disk space held by file */
 268         u_quad_t        va_filerev;     /* file modification number */
 269 };
 270
 271 #endif
 272
 273 /* structure used by CODA_STATFS for getting cache information from venus */
 274 struct coda_statfs {
 275     int32_t f_blocks;
 276     int32_t f_bfree;
 277     int32_t f_bavail;
 278     int32_t f_files;
 279     int32_t f_ffree;
 280 };
 281
 282 /*
 283  * Kernel <--> Venus communications.
 284  */
 285
 286 #define CODA_ROOT       2
 287 #define CODA_SYNC       3
 288 #define CODA_OPEN       4
 289 #define CODA_CLOSE      5
 290 #define CODA_IOCTL      6
 291 #define CODA_GETATTR    7
 292 #define CODA_SETATTR    8
 293 #define CODA_ACCESS     9
 294 #define CODA_LOOKUP     10
 295 #define CODA_CREATE     11
 296 #define CODA_REMOVE     12
 297 #define CODA_LINK       13
 298 #define CODA_RENAME     14
 299 #define CODA_MKDIR      15
 300 #define CODA_RMDIR      16
 301 #define CODA_READDIR    17
 302 #define CODA_SYMLINK    18
 303 #define CODA_READLINK   19
 304 #define CODA_FSYNC      20
 305 #define CODA_INACTIVE   21
 306 #define CODA_VGET       22
 307 #define CODA_SIGNAL     23
 308 #define CODA_REPLACE     24 /* DOWNCALL */
 309 #define CODA_FLUSH       25 /* DOWNCALL */
 310 #define CODA_PURGEUSER   26 /* DOWNCALL */
 311 #define CODA_ZAPFILE     27 /* DOWNCALL */
 312 #define CODA_ZAPDIR      28 /* DOWNCALL */
 313 #define CODA_PURGEFID    30 /* DOWNCALL */
 314 #define CODA_OPEN_BY_PATH 31
 315 #define CODA_RESOLVE     32
 316 #define CODA_REINTEGRATE 33
 317 #define CODA_STATFS      34
 318 #define CODA_MAKE_CINODE 35 /* DOWNCALL */
 319 #define CODA_NCALLS 36
 320
 321 #define DOWNCALL(opcode) \
 322         ((opcode >= CODA_REPLACE && opcode <= CODA_PURGEFID) || \
 323          opcode == CODA_MAKE_CINODE)
 324
 325 #define VC_MAXDATASIZE      8192
 326 #define VC_MAXMSGSIZE      sizeof(union inputArgs)+sizeof(union outputArgs) +\
 327                             VC_MAXDATASIZE
 328
 329 #define CIOC_KERNEL_VERSION _IOWR('c', 10, sizeof (int))
 330
 331 #if     0
 332 #define CODA_KERNEL_VERSION 0 /* don't care about kernel version number */
 333 #define CODA_KERNEL_VERSION 1 /* The old venus 4.6 compatible interface */
 334 #endif
 335 #define CODA_KERNEL_VERSION 2 /* venus_lookup gets an extra parameter */
 336
 337 /*
 338  *        Venus <-> Coda  RPC arguments
 339  */
 340 struct coda_in_hdr {
 341     unsigned long opcode;
 342     unsigned long unique;           /* Keep multiple outstanding msgs distinct */
 343     u_short pid;                    /* Common to all */
 344     u_short pgid;                   /* Common to all */
 345     u_short sid;                    /* Common to all */
 346     struct coda_cred cred;          /* Common to all */
 347 };
 348
 349 /* Really important that opcode and unique are 1st two fields! */
 350 struct coda_out_hdr {
 351     unsigned long opcode;
 352     unsigned long unique;
 353     unsigned long result;
 354 };
 355
 356 /* coda_root: NO_IN */
 357 struct coda_root_out {
 358     struct coda_out_hdr oh;
 359     ViceFid VFid;
 360 };
 361
 362 struct coda_root_in {
 363     struct coda_in_hdr in;
 364 };
 365
 366 /* coda_sync: */
 367 /* Nothing needed for coda_sync */
 368
 369 /* coda_open: */
 370 struct coda_open_in {
 371     struct coda_in_hdr ih;
 372     ViceFid     VFid;
 373     int flags;
 374 };
 375
 376 struct coda_open_out {
 377     struct coda_out_hdr oh;
 378     cdev_t      dev;
 379     ino_t       inode;
 380 };
 381
 382
 383 /* coda_close: */
 384 struct coda_close_in {
 385     struct coda_in_hdr ih;
 386     ViceFid     VFid;
 387     int flags;
 388 };
 389
 390 struct coda_close_out {
 391     struct coda_out_hdr out;
 392 };
 393
 394 /* coda_ioctl: */
 395 struct coda_ioctl_in {
 396     struct coda_in_hdr ih;
 397     ViceFid VFid;
 398     int cmd;
 399     int len;
 400     int rwflag;
 401     char *data;                 /* Place holder for data. */
 402 };
 403
 404 struct coda_ioctl_out {
 405     struct coda_out_hdr oh;
 406     int len;
 407     caddr_t     data;           /* Place holder for data. */
 408 };
 409
 410
 411 /* coda_getattr: */
 412 struct coda_getattr_in {
 413     struct coda_in_hdr ih;
 414     ViceFid VFid;
 415 };
 416
 417 struct coda_getattr_out {
 418     struct coda_out_hdr oh;
 419     struct coda_vattr attr;
 420 };
 421
 422
 423 /* coda_setattr: NO_OUT */
 424 struct coda_setattr_in {
 425     struct coda_in_hdr ih;
 426     ViceFid VFid;
 427     struct coda_vattr attr;
 428 };
 429
 430 struct coda_setattr_out {
 431     struct coda_out_hdr out;
 432 };
 433
 434 /* coda_access: NO_OUT */
 435 struct coda_access_in {
 436     struct coda_in_hdr ih;
 437     ViceFid     VFid;
 438     int flags;
 439 };
 440
 441 struct coda_access_out {
 442     struct coda_out_hdr out;
 443 };
 444
 445
 446 /* lookup flags */
 447 #define CLU_CASE_SENSITIVE     0x01
 448 #define CLU_CASE_INSENSITIVE   0x02
 449
 450 /* coda_lookup: */
 451 struct  coda_lookup_in {
 452     struct coda_in_hdr ih;
 453     ViceFid     VFid;
 454     int         name;           /* Place holder for data. */
 455     int         flags;
 456 };
 457
 458 struct coda_lookup_out {
 459     struct coda_out_hdr oh;
 460     ViceFid VFid;
 461     int vtype;
 462 };
 463
 464
 465 /* coda_create: */
 466 struct coda_create_in {
 467     struct coda_in_hdr ih;
 468     ViceFid VFid;
 469     struct coda_vattr attr;
 470     int excl;
 471     int mode;
 472     int         name;           /* Place holder for data. */
 473 };
 474
 475 struct coda_create_out {
 476     struct coda_out_hdr oh;
 477     ViceFid VFid;
 478     struct coda_vattr attr;
 479 };
 480
 481
 482 /* coda_remove: NO_OUT */
 483 struct coda_remove_in {
 484     struct coda_in_hdr ih;
 485     ViceFid     VFid;
 486     int name;           /* Place holder for data. */
 487 };
 488
 489 struct coda_remove_out {
 490     struct coda_out_hdr out;
 491 };
 492
 493 /* coda_link: NO_OUT */
 494 struct coda_link_in {
 495     struct coda_in_hdr ih;
 496     ViceFid sourceFid;          /* cnode to link *to* */
 497     ViceFid destFid;            /* Directory in which to place link */
 498     int tname;          /* Place holder for data. */
 499 };
 500
 501 struct coda_link_out {
 502     struct coda_out_hdr out;
 503 };
 504
 505
 506 /* coda_rename: NO_OUT */
 507 struct coda_rename_in {
 508     struct coda_in_hdr ih;
 509     ViceFid     sourceFid;
 510     int         srcname;
 511     ViceFid destFid;
 512     int         destname;
 513 };
 514
 515 struct coda_rename_out {
 516     struct coda_out_hdr out;
 517 };
 518
 519 /* coda_mkdir: */
 520 struct coda_mkdir_in {
 521     struct coda_in_hdr ih;
 522     ViceFid     VFid;
 523     struct coda_vattr attr;
 524     int    name;                /* Place holder for data. */
 525 };
 526
 527 struct coda_mkdir_out {
 528     struct coda_out_hdr oh;
 529     ViceFid VFid;
 530     struct coda_vattr attr;
 531 };
 532
 533
 534 /* coda_rmdir: NO_OUT */
 535 struct coda_rmdir_in {
 536     struct coda_in_hdr ih;
 537     ViceFid     VFid;
 538     int name;           /* Place holder for data. */
 539 };
 540
 541 struct coda_rmdir_out {
 542     struct coda_out_hdr out;
 543 };
 544
 545 /* coda_readdir: */
 546 struct coda_readdir_in {
 547     struct coda_in_hdr ih;
 548     ViceFid     VFid;
 549     int count;
 550     int offset;
 551 };
 552
 553 struct coda_readdir_out {
 554     struct coda_out_hdr oh;
 555     int size;
 556     caddr_t     data;           /* Place holder for data. */
 557 };
 558
 559 /* coda_symlink: NO_OUT */
 560 struct coda_symlink_in {
 561     struct coda_in_hdr ih;
 562     ViceFid     VFid;          /* Directory to put symlink in */
 563     int srcname;
 564     struct coda_vattr attr;
 565     int tname;
 566 };
 567
 568 struct coda_symlink_out {
 569     struct coda_out_hdr out;
 570 };
 571
 572 /* coda_readlink: */
 573 struct coda_readlink_in {
 574     struct coda_in_hdr ih;
 575     ViceFid VFid;
 576 };
 577
 578 struct coda_readlink_out {
 579     struct coda_out_hdr oh;
 580     int count;
 581     caddr_t     data;           /* Place holder for data. */
 582 };
 583
 584
 585 /* coda_fsync: NO_OUT */
 586 struct coda_fsync_in {
 587     struct coda_in_hdr ih;
 588     ViceFid VFid;
 589 };
 590
 591 struct coda_fsync_out {
 592     struct coda_out_hdr out;
 593 };
 594
 595 /* coda_inactive: NO_OUT */
 596 struct coda_inactive_in {
 597     struct coda_in_hdr ih;
 598     ViceFid VFid;
 599 };
 600
 601 /* coda_vget: */
 602 struct coda_vget_in {
 603     struct coda_in_hdr ih;
 604     ViceFid VFid;
 605 };
 606
 607 struct coda_vget_out {
 608     struct coda_out_hdr oh;
 609     ViceFid VFid;
 610     int vtype;
 611 };
 612
 613
 614 /* CODA_SIGNAL is out-of-band, doesn't need data. */
 615 /* CODA_INVALIDATE is a venus->kernel call */
 616 /* CODA_FLUSH is a venus->kernel call */
 617
 618 /* coda_purgeuser: */
 619 /* CODA_PURGEUSER is a venus->kernel call */
 620 struct coda_purgeuser_out {
 621     struct coda_out_hdr oh;
 622     struct coda_cred cred;
 623 };
 624
 625 /* coda_zapfile: */
 626 /* CODA_ZAPFILE is a venus->kernel call */
 627 struct coda_zapfile_out {
 628     struct coda_out_hdr oh;
 629     ViceFid CodaFid;
 630 };
 631
 632 /* coda_zapdir: */
 633 /* CODA_ZAPDIR is a venus->kernel call */
 634 struct coda_zapdir_out {
 635     struct coda_out_hdr oh;
 636     ViceFid CodaFid;
 637 };
 638
 639 /* coda_zapnode: */
 640 /* CODA_ZAPVNODE is a venus->kernel call */
 641 struct coda_zapvnode_out {
 642     struct coda_out_hdr oh;
 643     struct coda_cred cred;
 644     ViceFid VFid;
 645 };
 646
 647 /* coda_purgefid: */
 648 /* CODA_PURGEFID is a venus->kernel call */
 649 struct coda_purgefid_out {
 650     struct coda_out_hdr oh;
 651     ViceFid CodaFid;
 652 };
 653
 654 struct coda_make_cinode_out {
 655     struct coda_out_hdr oh;
 656     ViceFid CodaFid;
 657     struct coda_vattr attr;
 658     int fd;
 659 };
 660
 661 /* coda_rdwr: */
 662 struct coda_rdwr_in {
 663     struct coda_in_hdr ih;
 664     ViceFid     VFid;
 665     int rwflag;
 666     int count;
 667     int offset;
 668     int ioflag;
 669     caddr_t     data;           /* Place holder for data. */
 670 };
 671
 672 struct coda_rdwr_out {
 673     struct coda_out_hdr oh;
 674     int rwflag;
 675     int count;
 676     caddr_t     data;   /* Place holder for data. */
 677 };
 678
 679
 680 /* coda_replace: */
 681 /* CODA_REPLACE is a venus->kernel call */
 682 struct coda_replace_out { /* coda_replace is a venus->kernel call */
 683     struct coda_out_hdr oh;
 684     ViceFid NewFid;
 685     ViceFid OldFid;
 686 };
 687
 688 /* coda_open_by_path: */
 689 struct coda_open_by_path_in {
 690     struct coda_in_hdr ih;
 691     ViceFid     VFid;
 692     int flags;
 693 };
 694
 695 struct coda_open_by_path_out {
 696     struct coda_out_hdr oh;
 697         int path;
 698 };
 699
 700 /* coda_statfs: NO_IN */
 701 struct coda_statfs_in {
 702     struct coda_in_hdr in;
 703 };
 704
 705 struct coda_statfs_out {
 706     struct coda_out_hdr oh;
 707     struct coda_statfs stat;
 708 };
 709
 710 /*
 711  * Occasionally, we don't cache the fid returned by CODA_LOOKUP.
 712  * For instance, if the fid is inconsistent.
 713  * This case is handled by setting the top bit of the type result parameter.
 714  */
 715 #define CODA_NOCACHE          0x80000000
 716
 717 union inputArgs {
 718     struct coda_in_hdr ih;              /* NB: every struct below begins with an ih */
 719     struct coda_open_in coda_open;
 720     struct coda_close_in coda_close;
 721     struct coda_ioctl_in coda_ioctl;
 722     struct coda_getattr_in coda_getattr;
 723     struct coda_setattr_in coda_setattr;
 724     struct coda_access_in coda_access;
 725     struct coda_lookup_in coda_lookup;
 726     struct coda_create_in coda_create;
 727     struct coda_remove_in coda_remove;
 728     struct coda_link_in coda_link;
 729     struct coda_rename_in coda_rename;
 730     struct coda_mkdir_in coda_mkdir;
 731     struct coda_rmdir_in coda_rmdir;
 732     struct coda_readdir_in coda_readdir;
 733     struct coda_symlink_in coda_symlink;
 734     struct coda_readlink_in coda_readlink;
 735     struct coda_fsync_in coda_fsync;
 736     struct coda_inactive_in coda_inactive;
 737     struct coda_vget_in coda_vget;
 738     struct coda_rdwr_in coda_rdwr;
 739     struct coda_open_by_path_in coda_open_by_path;
 740     struct coda_statfs_in coda_statfs;
 741 };
 742
 743 union outputArgs {
 744     struct coda_out_hdr oh;             /* NB: every struct below begins with an oh */
 745     struct coda_root_out coda_root;
 746     struct coda_open_out coda_open;
 747     struct coda_ioctl_out coda_ioctl;
 748     struct coda_getattr_out coda_getattr;
 749     struct coda_lookup_out coda_lookup;
 750     struct coda_create_out coda_create;
 751     struct coda_mkdir_out coda_mkdir;
 752     struct coda_readdir_out coda_readdir;
 753     struct coda_readlink_out coda_readlink;
 754     struct coda_vget_out coda_vget;
 755     struct coda_purgeuser_out coda_purgeuser;
 756     struct coda_zapfile_out coda_zapfile;
 757     struct coda_zapdir_out coda_zapdir;
 758     struct coda_zapvnode_out coda_zapvnode;
 759     struct coda_purgefid_out coda_purgefid;
 760     struct coda_rdwr_out coda_rdwr;
 761     struct coda_replace_out coda_replace;
 762     struct coda_make_cinode_out coda_make_cinode;
 763     struct coda_open_by_path_out coda_open_by_path;
 764     struct coda_statfs_out coda_statfs;
 765 };
 766
 767 union coda_downcalls {
 768     /* CODA_INVALIDATE is a venus->kernel call */
 769     /* CODA_FLUSH is a venus->kernel call */
 770     struct coda_purgeuser_out purgeuser;
 771     struct coda_zapfile_out zapfile;
 772     struct coda_zapdir_out zapdir;
 773     struct coda_zapvnode_out zapvnode;
 774     struct coda_purgefid_out purgefid;
 775     struct coda_replace_out replace;
 776 };
 777
 778
 779 /*
 780  * Used for identifying usage of "Control" and pioctls
 781  */
 782
 783 #define PIOCPARM_MASK 0x0000ffff
 784 struct ViceIoctl {
 785         caddr_t in, out;        /* Data to be transferred in, or out */
 786         short in_size;          /* Size of input buffer <= 2K */
 787         short out_size;         /* Maximum size of output buffer, <= 2K */
 788 };
 789
 790 struct PioctlData {
 791         const char *path;
 792         int follow;
 793         struct ViceIoctl vi;
 794 };
 795
 796 #define CODA_CONTROL            ".CONTROL"
 797 #define CODA_CONTROLLEN           8
 798 #define CTL_VOL                 -1
 799 #define CTL_VNO                 -1
 800 #define CTL_UNI                 -1
 801 #define CTL_INO                 -1
 802 #define CTL_FILE                "/coda/.CONTROL"
 803
 804
 805 #define IS_CTL_FID(fidp)        ((fidp)->Volume == CTL_VOL &&\
 806                                  (fidp)->Vnode == CTL_VNO &&\
 807                                  (fidp)->Unique == CTL_UNI)
 808 #endif
 809