FreeBSD/Linux Kernel Cross Reference
sys/coda/coda.h

     /*-
      * 
      *             Coda: an Experimental Distributed File System
      *                              Release 3.1
      * 
      *           Copyright (c) 1987-1998 Carnegie Mellon University
      *                          All Rights Reserved
      * 
      * Permission  to  use, copy, modify and distribute this software and its
     * documentation is hereby granted,  provided  that  both  the  copyright
     * notice  and  this  permission  notice  appear  in  all  copies  of the
     * software, derivative works or  modified  versions,  and  any  portions
     * thereof, and that both notices appear in supporting documentation, and
     * that credit is given to Carnegie Mellon University  in  all  documents
     * and publicity pertaining to direct or indirect use of this code or its
     * derivatives.
     * 
     * CODA IS AN EXPERIMENTAL SOFTWARE SYSTEM AND IS  KNOWN  TO  HAVE  BUGS,
     * SOME  OF  WHICH MAY HAVE SERIOUS CONSEQUENCES.  CARNEGIE MELLON ALLOWS
     * FREE USE OF THIS SOFTWARE IN ITS "AS IS" CONDITION.   CARNEGIE  MELLON
     * DISCLAIMS  ANY  LIABILITY  OF  ANY  KIND  FOR  ANY  DAMAGES WHATSOEVER
     * RESULTING DIRECTLY OR INDIRECTLY FROM THE USE OF THIS SOFTWARE  OR  OF
     * ANY DERIVATIVE WORK.
     * 
     * Carnegie  Mellon  encourages  users  of  this  software  to return any
     * improvements or extensions that  they  make,  and  to  grant  Carnegie
     * Mellon the rights to redistribute these changes without encumbrance.
     * 
     *      @(#) src/sys/coda/coda.h,v 1.1.1.1 1998/08/29 21:14:52 rvb Exp $ 
     * $FreeBSD: releng/6.2/sys/coda/coda.h 156262 2006-03-03 22:05:23Z yar $
     * 
     */
    
    
    /*
     *
     * Based on cfs.h from Mach, but revamped for increased simplicity.
     * Linux modifications by Peter Braam, Aug 1996
     */
    
    #ifndef _CODA_HEADER_
    #define _CODA_HEADER_
    
    #include "opt_coda.h"   /* for CODA_COMPAT_5 option */
    
    /* Avoid CODA_COMPAT_5 redefinition in coda5 module */
    #if defined (CODA5_MODULE) && !defined(CODA_COMPAT_5)
    #define CODA_COMPAT_5
    #endif
    
    /* Catch new _KERNEL defn for NetBSD */
    #ifdef __NetBSD__
    #include <sys/types.h>
    #endif 
    
    #ifndef CODA_MAXSYMLINKS
    #define CODA_MAXSYMLINKS 10
    #endif
    
    #if defined(DJGPP) || defined(__CYGWIN32__)
    #ifdef _KERNEL
    typedef unsigned long u_long;
    typedef unsigned int u_int;
    typedef unsigned short u_short;
    typedef u_long ino_t;
    typedef u_long struct cdev *;
    typedef void * caddr_t;
    #ifdef DOS
    typedef unsigned __int64 u_quad_t;
    #else 
    typedef unsigned long long u_quad_t;
    #endif
    
    #define inline
    
    struct timespec {
            long       ts_sec;
            long       ts_nsec;
    };
    #else  /* DJGPP but not _KERNEL */
    #include <sys/types.h>
    #include <sys/time.h>
    typedef unsigned long long u_quad_t;
    #endif /* !_KERNEL */
    #endif /* !DJGPP */
    
    
    #if defined(__linux__)
    #define cdev_t u_quad_t
    #if !defined(_UQUAD_T_) && (!defined(__GLIBC__) || __GLIBC__ < 2)
    #define _UQUAD_T_ 1
    typedef unsigned long long u_quad_t;
    #endif
    #else
    #define cdev_t dev_t
    #endif
    
    #ifdef __CYGWIN32__
    typedef unsigned char u_int8_t;
   struct timespec {
           time_t  tv_sec;         /* seconds */
           long    tv_nsec;        /* nanoseconds */
   };
   #endif
   
   
   /*
    * Cfs constants
    */
   #define CODA_MAXNAMLEN   255
   #define CODA_MAXPATHLEN  1024
   #define CODA_MAXSYMLINK  10
   
   /* these are Coda's version of O_RDONLY etc combinations
    * to deal with VFS open modes
    */
   #define C_O_READ        0x001
   #define C_O_WRITE       0x002
   #define C_O_TRUNC       0x010
   #define C_O_EXCL        0x100
   #define C_O_CREAT       0x200
   
   /* these are to find mode bits in Venus */ 
   #define C_M_READ  00400
   #define C_M_WRITE 00200
   
   /* for access Venus will use */
   #define C_A_C_OK    8               /* Test for writing upon create.  */
   #define C_A_R_OK    4               /* Test for read permission.  */
   #define C_A_W_OK    2               /* Test for write permission.  */
   #define C_A_X_OK    1               /* Test for execute permission.  */
   #define C_A_F_OK    0               /* Test for existence.  */
   
   
   
   #ifndef _VENUS_DIRENT_T_
   #define _VENUS_DIRENT_T_ 1
   struct venus_dirent {
           unsigned long   d_fileno;               /* file number of entry */
           unsigned short  d_reclen;               /* length of this record */
           char            d_type;                 /* file type, see below */
           char            d_namlen;               /* length of string in d_name */
           char            d_name[CODA_MAXNAMLEN + 1];/* name must be no longer than this */
   };
   #undef DIRSIZ
   #define DIRSIZ(dp)      ((sizeof (struct venus_dirent) - (CODA_MAXNAMLEN+1)) + \
                            (((dp)->d_namlen+1 + 3) &~ 3))
   
   /*
    * File types
    */
   #define CDT_UNKNOWN      0
   #define CDT_FIFO         1
   #define CDT_CHR          2
   #define CDT_DIR          4
   #define CDT_BLK          6
   #define CDT_REG          8
   #define CDT_LNK         10
   #define CDT_SOCK        12
   #define CDT_WHT         14
   
   /*
    * Convert between stat structure types and directory types.
    */
   #define IFTOCDT(mode)   (((mode) & 0170000) >> 12)
   #define CDTTOIF(dirtype)        ((dirtype) << 12)
   
   #endif
   
   #ifdef CODA_COMPAT_5
   
   typedef struct {
       u_long Volume;
       u_long Vnode;
       u_long Unique;      
   } CodaFid;
   
   static __inline__ ino_t coda_f2i(CodaFid *fid)
   {
           if (!fid) return 0;
           return (fid->Unique + (fid->Vnode<<10) + (fid->Volume<<20));
   }
   
   static __inline__ char * coda_f2s(CodaFid *fid)
   {
     static char fid_str [35];
     snprintf (fid_str, 35, "[%lx.%lx.%lx]", fid->Volume,
               fid->Vnode, fid->Unique);
     return fid_str;
   }
    
   static __inline__ int coda_fid_eq (CodaFid *fid1, CodaFid *fid2)
   {
     return (fid1->Volume == fid2->Volume &&
             fid1->Vnode == fid2->Vnode &&
             fid1->Unique == fid2->Unique);
   }
     
   struct coda_cred {
       u_int32_t cr_uid, cr_euid, cr_suid, cr_fsuid; /* Real, efftve, set, fs uid*/
       u_int32_t cr_groupid,     cr_egid, cr_sgid, cr_fsgid; /* same for groups */
   };
   
   #else   /* CODA_COMPAT_5 */
   
   typedef struct  {
           u_int32_t opaque[4];
   } CodaFid;
   
   static __inline__ ino_t  coda_f2i(CodaFid *fid)
   {
       if ( ! fid ) 
           return 0; 
       return (fid->opaque[3] ^ (fid->opaque[2]<<10) ^ (fid->opaque[1]<<20) ^ fid->opaque[0]);
   }
           
   static __inline__ char * coda_f2s(CodaFid *fid)
    {
        static char fid_str [35];
        snprintf (fid_str, 35, "[%x.%x.%x.%x]", fid->opaque[0],
                  fid->opaque[1], fid->opaque[2], fid->opaque[3]);
        return fid_str;
    }
   
   static __inline__ int coda_fid_eq (CodaFid *fid1, CodaFid *fid2)
   {
     return (fid1->opaque[0] == fid2->opaque[0] &&
             fid1->opaque[1] == fid2->opaque[1] &&
             fid1->opaque[2] == fid2->opaque[2] &&
             fid1->opaque[3] == fid2->opaque[3]);
   }
   
   #endif  /* CODA_COMPAT_5 */
   
   #ifndef _VENUS_VATTR_T_
   #define _VENUS_VATTR_T_
   /*
    * Vnode types.  VNON means no type.
    */
   enum coda_vtype { C_VNON, C_VREG, C_VDIR, C_VBLK, C_VCHR, C_VLNK, C_VSOCK, C_VFIFO, C_VBAD };
   
   struct coda_vattr {
           int             va_type;        /* vnode type (for create) */
           u_short         va_mode;        /* files access mode and type */
           short           va_nlink;       /* number of references to file */
           uid_t           va_uid;         /* owner user id */
           gid_t           va_gid;         /* owner group id */
           long            va_fileid;      /* file id */
           u_quad_t        va_size;        /* file size in bytes */
           long            va_blocksize;   /* blocksize preferred for i/o */
           struct timespec va_atime;       /* time of last access */
           struct timespec va_mtime;       /* time of last modification */
           struct timespec va_ctime;       /* time file changed */
           u_long          va_gen;         /* generation number of file */
           u_long          va_flags;       /* flags defined for file */
           cdev_t          va_rdev;        /* device special file represents */
           u_quad_t        va_bytes;       /* bytes of disk space held by file */
           u_quad_t        va_filerev;     /* file modification number */
   };
   
   #endif 
   
   /* structure used by CODA_STATFS for getting cache information from venus */
   struct coda_statfs {
       int32_t f_blocks;
       int32_t f_bfree;
       int32_t f_bavail;
       int32_t f_files;
       int32_t f_ffree;
   };
   
   /*
    * Kernel <--> Venus communications.
    */
   
   #define CODA_ROOT       2
   #define CODA_OPEN_BY_FD 3
   #define CODA_OPEN       4
   #define CODA_CLOSE      5
   #define CODA_IOCTL      6
   #define CODA_GETATTR    7
   #define CODA_SETATTR    8
   #define CODA_ACCESS     9
   #define CODA_LOOKUP     10
   #define CODA_CREATE     11
   #define CODA_REMOVE     12
   #define CODA_LINK       13
   #define CODA_RENAME     14
   #define CODA_MKDIR      15
   #define CODA_RMDIR      16
   #define CODA_READDIR    17
   #define CODA_SYMLINK    18
   #define CODA_READLINK   19
   #define CODA_FSYNC      20
   #define CODA_INACTIVE   21
   #define CODA_VGET       22
   #define CODA_SIGNAL     23
   #define CODA_REPLACE    24
   #define CODA_FLUSH       25
   #define CODA_PURGEUSER   26
   #define CODA_ZAPFILE     27
   #define CODA_ZAPDIR      28
   #define CODA_PURGEFID    30
   #define CODA_OPEN_BY_PATH 31
   #define CODA_RESOLVE     32
   #define CODA_REINTEGRATE 33
   #define CODA_STATFS      34
   #define CODA_NCALLS 35
   
   #define DOWNCALL(opcode) (opcode >= CODA_REPLACE && opcode <= CODA_PURGEFID)
   
   #define VC_MAXDATASIZE      8192
   #define VC_MAXMSGSIZE      sizeof(union inputArgs)+sizeof(union outputArgs) +\
                               VC_MAXDATASIZE  
   
   #define CIOC_KERNEL_VERSION _IOWR('c', 10, sizeof (int))
   #if     0
           /* don't care about kernel version number */
   #define CODA_KERNEL_VERSION 0
           /* The old venus 4.6 compatible interface */
   #define CODA_KERNEL_VERSION 1
   #endif  /* realms/cells */
   #ifdef CODA_COMPAT_5
           /* venus_lookup gets an extra parameter to aid windows.*/
   #define CODA_KERNEL_VERSION 2
   #else
           /* 128-bit fids for realms */
   #define CODA_KERNEL_VERSION 3 
   #endif
   
   /*
    *        Venus <-> Coda  RPC arguments
    */
   #ifdef CODA_COMPAT_5
   struct coda_in_hdr {
       unsigned long opcode;
       unsigned long unique;           /* Keep multiple outstanding msgs distinct */
       u_short pid;                    /* Common to all */
       u_short pgid;                   /* Common to all */
       u_short sid;                    /* Common to all */
       struct coda_cred cred;          /* Common to all */    
   };
   #else
   struct coda_in_hdr {
       u_int32_t opcode;
       u_int32_t unique;       /* Keep multiple outstanding msgs distinct */
       pid_t pid;              /* Common to all */
       pid_t pgid;             /* Common to all */
       uid_t uid;              /* Common to all */
   };
   #endif
   
   /* Really important that opcode and unique are 1st two fields! */
   struct coda_out_hdr {
       unsigned long opcode;
       unsigned long unique;       
       unsigned long result;
   };
   
   /* coda_root: NO_IN */
   struct coda_root_out {
       struct coda_out_hdr oh;
       CodaFid Fid;
   };
   
   struct coda_root_in {
       struct coda_in_hdr in;
   };
   
   /* coda_sync: */
   /* Nothing needed for coda_sync */
   
   /* coda_open: */
   struct coda_open_in {
       struct coda_in_hdr ih;
       CodaFid     Fid;
       int flags;
   };
   
   struct coda_open_out {
       struct coda_out_hdr oh;
       cdev_t      dev;
       ino_t       inode;
   };
   
   
   /* coda_close: */
   struct coda_close_in {
       struct coda_in_hdr ih;
       CodaFid     Fid;
       int flags;
   };
   
   struct coda_close_out {
       struct coda_out_hdr out;
   };
   
   /* coda_ioctl: */
   struct coda_ioctl_in {
       struct coda_in_hdr ih;
       CodaFid Fid;
       int cmd;
       int len;
       int rwflag;
       char *data;                 /* Place holder for data. */
   };
   
   struct coda_ioctl_out {
       struct coda_out_hdr oh;
       int len;
       caddr_t     data;           /* Place holder for data. */
   };
   
   
   /* coda_getattr: */
   struct coda_getattr_in {
       struct coda_in_hdr ih;
       CodaFid Fid;
   };
   
   struct coda_getattr_out {
       struct coda_out_hdr oh;
       struct coda_vattr attr;
   };
   
   
   /* coda_setattr: NO_OUT */
   struct coda_setattr_in {
       struct coda_in_hdr ih;
       CodaFid Fid;
       struct coda_vattr attr;
   };
   
   struct coda_setattr_out {
       struct coda_out_hdr out;
   };
   
   /* coda_access: NO_OUT */
   struct coda_access_in {
       struct coda_in_hdr ih;
       CodaFid     Fid;
       int flags;
   };
   
   struct coda_access_out {
       struct coda_out_hdr out;
   };
   
   
   /* lookup flags */
   #define CLU_CASE_SENSITIVE     0x01
   #define CLU_CASE_INSENSITIVE   0x02
   
   /* coda_lookup: */
   struct  coda_lookup_in {
       struct coda_in_hdr ih;
       CodaFid     Fid;
       int         name;           /* Place holder for data. */
       int         flags;  
   };
   
   struct coda_lookup_out {
       struct coda_out_hdr oh;
       CodaFid Fid;
       int vtype;
   };
   
   
   /* coda_create: */
   struct coda_create_in {
       struct coda_in_hdr ih;
       CodaFid Fid;
       struct coda_vattr attr;
       int excl;
       int mode;
       int         name;           /* Place holder for data. */
   };
   
   struct coda_create_out {
       struct coda_out_hdr oh;
       CodaFid Fid;
       struct coda_vattr attr;
   };
   
   
   /* coda_remove: NO_OUT */
   struct coda_remove_in {
       struct coda_in_hdr ih;
       CodaFid     Fid;
       int name;           /* Place holder for data. */
   };
   
   struct coda_remove_out {
       struct coda_out_hdr out;
   };
   
   /* coda_link: NO_OUT */
   struct coda_link_in {
       struct coda_in_hdr ih;
       CodaFid sourceFid;          /* cnode to link *to* */
       CodaFid destFid;            /* Directory in which to place link */
       int tname;          /* Place holder for data. */
   };
   
   struct coda_link_out {
       struct coda_out_hdr out;
   };
   
   
   /* coda_rename: NO_OUT */
   struct coda_rename_in {
       struct coda_in_hdr ih;
       CodaFid     sourceFid;
       int         srcname;
       CodaFid destFid;
       int         destname;
   };
   
   struct coda_rename_out {
       struct coda_out_hdr out;
   };
   
   /* coda_mkdir: */
   struct coda_mkdir_in {
       struct coda_in_hdr ih;
       CodaFid     Fid;
       struct coda_vattr attr;
       int    name;                /* Place holder for data. */
   };
   
   struct coda_mkdir_out {
       struct coda_out_hdr oh;
       CodaFid Fid;
       struct coda_vattr attr;
   };
   
   
   /* coda_rmdir: NO_OUT */
   struct coda_rmdir_in {
       struct coda_in_hdr ih;
       CodaFid     Fid;
       int name;           /* Place holder for data. */
   };
   
   struct coda_rmdir_out {
       struct coda_out_hdr out;
   };
   
   /* coda_readdir: */
   struct coda_readdir_in {
       struct coda_in_hdr ih;
       CodaFid     Fid;
       int count;
       int offset;
   };
   
   struct coda_readdir_out {
       struct coda_out_hdr oh;
       int size;
       caddr_t     data;           /* Place holder for data. */
   };
   
   /* coda_symlink: NO_OUT */
   struct coda_symlink_in {
       struct coda_in_hdr ih;
       CodaFid     Fid;          /* Directory to put symlink in */
       int srcname;
       struct coda_vattr attr;
       int tname;
   };
   
   struct coda_symlink_out {
       struct coda_out_hdr out;
   };
   
   /* coda_readlink: */
   struct coda_readlink_in {
       struct coda_in_hdr ih;
       CodaFid Fid;
   };
   
   struct coda_readlink_out {
       struct coda_out_hdr oh;
       int count;
       caddr_t     data;           /* Place holder for data. */
   };
   
   
   /* coda_fsync: NO_OUT */
   struct coda_fsync_in {
       struct coda_in_hdr ih;
       CodaFid Fid;
   };
   
   struct coda_fsync_out {
       struct coda_out_hdr out;
   };
   
   /* coda_inactive: NO_OUT */
   struct coda_inactive_in {
       struct coda_in_hdr ih;
       CodaFid Fid;
   };
   
   /* coda_vget: */
   struct coda_vget_in {
       struct coda_in_hdr ih;
       CodaFid Fid;
   };
   
   struct coda_vget_out {
       struct coda_out_hdr oh;
       CodaFid Fid;
       int vtype;
   };
   
   
   /* CODA_SIGNAL is out-of-band, doesn't need data. */
   /* CODA_INVALIDATE is a venus->kernel call */
   /* CODA_FLUSH is a venus->kernel call */
   
   /* coda_purgeuser: */
   /* CODA_PURGEUSER is a venus->kernel call */
   struct coda_purgeuser_out {
       struct coda_out_hdr oh;
   #ifdef CODA_COMPAT_5
       struct coda_cred cred;
   #else
       uid_t uid;
   #endif
   };
   
   /* coda_zapfile: */
   /* CODA_ZAPFILE is a venus->kernel call */
   struct coda_zapfile_out {  
       struct coda_out_hdr oh;
       CodaFid Fid;
   };
   
   /* coda_zapdir: */
   /* CODA_ZAPDIR is a venus->kernel call */       
   struct coda_zapdir_out {          
       struct coda_out_hdr oh;
       CodaFid Fid;
   };
   
   /* coda_zapnode: */
   /* CODA_ZAPVNODE is a venus->kernel call */     
   struct coda_zapvnode_out { 
       struct coda_out_hdr oh;
   #ifdef CODA_COMPAT_5
       struct coda_cred cred;
   #endif
       CodaFid Fid;
   };
   
   /* coda_purgefid: */
   /* CODA_PURGEFID is a venus->kernel call */     
   struct coda_purgefid_out { 
       struct coda_out_hdr oh;
       CodaFid Fid;
   };
   
   /* coda_replace: */
   /* CODA_REPLACE is a venus->kernel call */      
   struct coda_replace_out { /* coda_replace is a venus->kernel call */
        struct coda_out_hdr oh;
       CodaFid NewFid;
       CodaFid OldFid;
   };
   
   /* coda_open_by_fd: */
   struct coda_open_by_fd_in {
       struct coda_in_hdr ih;
       CodaFid Fid;
       int flags;
   };
   
   struct coda_open_by_fd_out {
       struct coda_out_hdr oh;
       int fd;
       struct file *fh;
   };
   
   /* coda_open_by_path: */
   struct coda_open_by_path_in {
       struct coda_in_hdr ih;
       CodaFid     Fid;
       int flags;
   };
   
   struct coda_open_by_path_out {
       struct coda_out_hdr oh;
       int path;
   };
   
   /* coda_statfs: NO_IN */
   struct coda_statfs_in {
       struct coda_in_hdr ih;
   };
   
   struct coda_statfs_out {
       struct coda_out_hdr oh;
       struct coda_statfs stat;
   };
   
   /* 
    * Occasionally, we don't cache the fid returned by CODA_LOOKUP. 
    * For instance, if the fid is inconsistent. 
    * This case is handled by setting the top bit of the type result parameter.
    */
   #define CODA_NOCACHE          0x80000000
   
   union inputArgs {
       struct coda_in_hdr ih;              /* NB: every struct below begins with an ih */
       struct coda_open_in coda_open;
       struct coda_close_in coda_close;
       struct coda_ioctl_in coda_ioctl;
       struct coda_getattr_in coda_getattr;
       struct coda_setattr_in coda_setattr;
       struct coda_access_in coda_access;
       struct coda_lookup_in coda_lookup;
       struct coda_create_in coda_create;
       struct coda_remove_in coda_remove;
       struct coda_link_in coda_link;
       struct coda_rename_in coda_rename;
       struct coda_mkdir_in coda_mkdir;
       struct coda_rmdir_in coda_rmdir;
       struct coda_readdir_in coda_readdir;
       struct coda_symlink_in coda_symlink;
       struct coda_readlink_in coda_readlink;
       struct coda_fsync_in coda_fsync;
       struct coda_vget_in coda_vget;
       struct coda_open_by_fd_in coda_open_by_fd;
       struct coda_open_by_path_in coda_open_by_path;
       struct coda_statfs_in coda_statfs;
   };
   
   union outputArgs {
       struct coda_out_hdr oh;             /* NB: every struct below begins with an oh */
       struct coda_root_out coda_root;
       struct coda_open_out coda_open;
       struct coda_ioctl_out coda_ioctl;
       struct coda_getattr_out coda_getattr;
       struct coda_lookup_out coda_lookup;
       struct coda_create_out coda_create;
       struct coda_mkdir_out coda_mkdir;
       struct coda_readdir_out coda_readdir;
       struct coda_readlink_out coda_readlink;
       struct coda_vget_out coda_vget;
       struct coda_purgeuser_out coda_purgeuser;
       struct coda_zapfile_out coda_zapfile;
       struct coda_zapdir_out coda_zapdir;
       struct coda_zapvnode_out coda_zapvnode;
       struct coda_purgefid_out coda_purgefid;
       struct coda_replace_out coda_replace;
       struct coda_open_by_fd_out coda_open_by_fd;
       struct coda_open_by_path_out coda_open_by_path;
       struct coda_statfs_out coda_statfs;
   };    
   
   union coda_downcalls {
       /* CODA_INVALIDATE is a venus->kernel call */
       /* CODA_FLUSH is a venus->kernel call */
       struct coda_purgeuser_out purgeuser;
       struct coda_zapfile_out zapfile;
       struct coda_zapdir_out zapdir;
       struct coda_zapvnode_out zapvnode;
       struct coda_purgefid_out purgefid;
       struct coda_replace_out replace;
   };
   
   
   /*
    * Used for identifying usage of "Control" and pioctls
    */
   
   #define PIOCPARM_MASK 0x0000ffff
   struct ViceIoctl {
           caddr_t in, out;        /* Data to be transferred in, or out */
           short in_size;          /* Size of input buffer <= 2K */
           short out_size;         /* Maximum size of output buffer, <= 2K */
   };
   
   #if defined(__CYGWIN32__) || defined(DJGPP)
   struct PioctlData {
           unsigned long cmd;
           const char *path;
           int follow;
           struct ViceIoctl vi;
   };
   #else
   struct PioctlData {
           const char *path;
           int follow;
           struct ViceIoctl vi;
   };
   #endif
   
   #define CODA_CONTROL            ".CONTROL"
   #define CODA_CONTROLLEN           8
   #define CTL_INO                 -1
   #define CTL_FILE                "/coda/.CONTROL"
   
   #ifdef CODA_COMPAT_5
   #define CTL_FID                 { -1, -1, -1 }
   #define IS_CTL_FID(fidp)        ((fidp)->Volume == -1 &&\
                                    (fidp)->Vnode == -1 &&\
                                    (fidp)->Unique == -1)
   #define INVAL_FID               { 0, 0, 0 }
   #else
   #define CTL_FID                 { { -1, -1, -1, -1 } }
   #define IS_CTL_FID(fidp)        ((fidp)->opaque[0] == -1 &&\
                                    (fidp)->opaque[1] == -1 &&\
                                    (fidp)->opaque[2] == -1 &&\
                                    (fidp)->opaque[3] == -1)
   #define INVAL_FID               { { 0, 0, 0, 0 } }
   #endif
   
   /* Data passed to mount */
   
   #define CODA_MOUNT_VERSION 1
   
   struct coda_mount_data {
           int             version;
           int             fd;       /* Opened device */
   };
   
   #endif 
   

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