nfsproto.h

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/*
 * Copyright (c) 1989, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Rick Macklem at The University of Guelph.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *      @(#)nfsproto.h  8.2 (Berkeley) 3/30/95
 * $FreeBSD: src/sys/nfs/nfsproto.h,v 1.11 2005/01/07 01:45:50 imp Exp $
 */


#ifndef _NFS_NFSPROTO_H_
#define _NFS_NFSPROTO_H_

#include <sys/mount.h> /* fhandle_t */

/*
 * nfs definitions as per the Version 2 and 3 specs
 */

/*
 * Constants as defined in the Sun NFS Version 2 and 3 specs.
 * "NFS: Network File System Protocol Specification" RFC1094
 * and in the "NFS: Network File System Version 3 Protocol
 * Specification"
 */

#define NFS_PORT        2049
#define NFS_PROG        100003
#define NFS_VER2        2
#define NFS_VER3        3
#define NFS_V2MAXDATA   8192
#define NFS_MAXDGRAMDATA 16384
#define NFS_MAXDATA     32768
#define NFS_MAXPATHLEN  1024
#define NFS_MAXNAMLEN   255
#define NFS_MAXPKTHDR   404
#define NFS_MAXPACKET   (NFS_MAXPKTHDR + NFS_MAXDATA)
#define NFS_MINPACKET   20
#define NFS_FABLKSIZE   512     /* Size in bytes of a block wrt fa_blocks */

/* Stat numbers for rpc returns (version 2 and 3) */
#define NFS_OK                  0
#define NFSERR_PERM             1
#define NFSERR_NOENT            2
#define NFSERR_IO               5
#define NFSERR_NXIO             6
#define NFSERR_ACCES            13
#define NFSERR_EXIST            17
#define NFSERR_XDEV             18      /* Version 3 only */
#define NFSERR_NODEV            19
#define NFSERR_NOTDIR           20
#define NFSERR_ISDIR            21
#define NFSERR_INVAL            22      /* Version 3 only */
#define NFSERR_FBIG             27
#define NFSERR_NOSPC            28
#define NFSERR_ROFS             30
#define NFSERR_MLINK            31      /* Version 3 only */
#define NFSERR_NAMETOL          63
#define NFSERR_NOTEMPTY         66
#define NFSERR_DQUOT            69
#define NFSERR_STALE            70
#define NFSERR_REMOTE           71      /* Version 3 only */
#define NFSERR_WFLUSH           99      /* Version 2 only */
#define NFSERR_BADHANDLE        10001   /* The rest Version 3, 4 only */
#define NFSERR_NOT_SYNC         10002
#define NFSERR_BAD_COOKIE       10003
#define NFSERR_NOTSUPP          10004
#define NFSERR_TOOSMALL         10005
#define NFSERR_SERVERFAULT      10006
#define NFSERR_BADTYPE          10007
#define NFSERR_JUKEBOX          10008
#define NFSERR_TRYLATER         NFSERR_JUKEBOX
#define NFSERR_STALEWRITEVERF   30001   /* Fake return for nfs_commit() */



#define NFSERR_RETVOID          0x20000000 /* Return void, not error */
#define NFSERR_AUTHERR          0x40000000 /* Mark an authentication error */
#define NFSERR_RETERR           0x80000000 /* Mark an error return for V3 */

/* Sizes in bytes of various nfs rpc components */
#define NFSX_UNSIGNED   4

/* specific to NFS Version 2 */
#define NFSX_V2FH       32
#define NFSX_V2FATTR    68
#define NFSX_V2SATTR    32
#define NFSX_V2COOKIE   4
#define NFSX_V2STATFS   20

/* specific to NFS Version 3 */
#define NFSX_V3FH               (sizeof (fhandle_t)) /* size this server uses */
#define NFSX_V3FHMAX            64      /* max. allowed by protocol */
#define NFSX_V3FATTR            84
#define NFSX_V3SATTR            60      /* max. all fields filled in */
#define NFSX_V3SRVSATTR         (sizeof (struct nfsv3_sattr))
#define NFSX_V3POSTOPATTR       (NFSX_V3FATTR + NFSX_UNSIGNED)
#define NFSX_V3WCCDATA          (NFSX_V3POSTOPATTR + 8 * NFSX_UNSIGNED)
#define NFSX_V3COOKIEVERF       8
#define NFSX_V3WRITEVERF        8
#define NFSX_V3CREATEVERF       8
#define NFSX_V3STATFS           52
#define NFSX_V3FSINFO           48
#define NFSX_V3PATHCONF         24

/* variants for both versions */
#define NFSX_FH(v3)             ((v3) ? (NFSX_V3FHMAX + NFSX_UNSIGNED) : \
                                        NFSX_V2FH)
#define NFSX_SRVFH(v3)          ((v3) ? NFSX_V3FH : NFSX_V2FH)
#define NFSX_FATTR(v3)          ((v3) ? NFSX_V3FATTR : NFSX_V2FATTR)
#define NFSX_PREOPATTR(v3)      ((v3) ? (7 * NFSX_UNSIGNED) : 0)
#define NFSX_POSTOPATTR(v3)     ((v3) ? (NFSX_V3FATTR + NFSX_UNSIGNED) : 0)
#define NFSX_POSTOPORFATTR(v3)  ((v3) ? (NFSX_V3FATTR + NFSX_UNSIGNED) : \
                                        NFSX_V2FATTR)
#define NFSX_WCCDATA(v3)        ((v3) ? NFSX_V3WCCDATA : 0)
#define NFSX_WCCORFATTR(v3)     ((v3) ? NFSX_V3WCCDATA : NFSX_V2FATTR)
#define NFSX_SATTR(v3)          ((v3) ? NFSX_V3SATTR : NFSX_V2SATTR)
#define NFSX_COOKIEVERF(v3)     ((v3) ? NFSX_V3COOKIEVERF : 0)
#define NFSX_WRITEVERF(v3)      ((v3) ? NFSX_V3WRITEVERF : 0)
#define NFSX_READDIR(v3)        ((v3) ? (5 * NFSX_UNSIGNED) : \
                                        (2 * NFSX_UNSIGNED))
#define NFSX_STATFS(v3)         ((v3) ? NFSX_V3STATFS : NFSX_V2STATFS)

/* nfs rpc procedure numbers (before version mapping) */
#define NFSPROC_NULL            0
#define NFSPROC_GETATTR         1
#define NFSPROC_SETATTR         2
#define NFSPROC_LOOKUP          3
#define NFSPROC_ACCESS          4
#define NFSPROC_READLINK        5
#define NFSPROC_READ            6
#define NFSPROC_WRITE           7
#define NFSPROC_CREATE          8
#define NFSPROC_MKDIR           9
#define NFSPROC_SYMLINK         10
#define NFSPROC_MKNOD           11
#define NFSPROC_REMOVE          12
#define NFSPROC_RMDIR           13
#define NFSPROC_RENAME          14
#define NFSPROC_LINK            15
#define NFSPROC_READDIR         16
#define NFSPROC_READDIRPLUS     17
#define NFSPROC_FSSTAT          18
#define NFSPROC_FSINFO          19
#define NFSPROC_PATHCONF        20
#define NFSPROC_COMMIT          21
#define NFSPROC_NOOP            22
#define NFS_NPROCS              23

/* Actual Version 2 procedure numbers */
#define NFSV2PROC_NULL          0
#define NFSV2PROC_GETATTR       1
#define NFSV2PROC_SETATTR       2
#define NFSV2PROC_NOOP          3
#define NFSV2PROC_ROOT          NFSV2PROC_NOOP  /* Obsolete */
#define NFSV2PROC_LOOKUP        4
#define NFSV2PROC_READLINK      5
#define NFSV2PROC_READ          6
#define NFSV2PROC_WRITECACHE    NFSV2PROC_NOOP  /* Obsolete */
#define NFSV2PROC_WRITE         8
#define NFSV2PROC_CREATE        9
#define NFSV2PROC_REMOVE        10
#define NFSV2PROC_RENAME        11
#define NFSV2PROC_LINK          12
#define NFSV2PROC_SYMLINK       13
#define NFSV2PROC_MKDIR         14
#define NFSV2PROC_RMDIR         15
#define NFSV2PROC_READDIR       16
#define NFSV2PROC_STATFS        17

/*
 * Constants used by the Version 3 protocol for various RPCs
 */
#define NFSV3SATTRTIME_DONTCHANGE       0
#define NFSV3SATTRTIME_TOSERVER         1
#define NFSV3SATTRTIME_TOCLIENT         2

#define NFSV3ACCESS_READ                0x01
#define NFSV3ACCESS_LOOKUP              0x02
#define NFSV3ACCESS_MODIFY              0x04
#define NFSV3ACCESS_EXTEND              0x08
#define NFSV3ACCESS_DELETE              0x10
#define NFSV3ACCESS_EXECUTE             0x20

#define NFSV3WRITE_UNSTABLE             0
#define NFSV3WRITE_DATASYNC             1
#define NFSV3WRITE_FILESYNC             2

#define NFSV3CREATE_UNCHECKED           0
#define NFSV3CREATE_GUARDED             1
#define NFSV3CREATE_EXCLUSIVE           2

#define NFSV3FSINFO_LINK                0x01
#define NFSV3FSINFO_SYMLINK             0x02
#define NFSV3FSINFO_HOMOGENEOUS         0x08
#define NFSV3FSINFO_CANSETTIME          0x10

/* File types */
typedef enum { NFNON=0, NFREG=1, NFDIR=2, NFBLK=3, NFCHR=4, NFLNK=5,
        NFSOCK=6, NFFIFO=7 } nfstype;

/* Structs for common parts of the rpc's */
/*
 * File Handle (32 bytes for version 2), variable up to 64 for version 3.
 * File Handles of up to NFS_SMALLFH in size are stored directly in the
 * nfs node, whereas larger ones are malloc'd. (This never happens when
 * NFS_SMALLFH is set to 64.)
 * NFS_SMALLFH should be in the range of 32 to 64 and be divisible by 4.
 */
#ifndef NFS_SMALLFH
#define NFS_SMALLFH     64
#endif
union nfsfh {
        fhandle_t       fh_generic;
        u_char          fh_bytes[NFS_SMALLFH];
};
typedef union nfsfh nfsfh_t;

struct nfsv2_time {
        u_int32_t       nfsv2_sec;
        u_int32_t       nfsv2_usec;
};
typedef struct nfsv2_time       nfstime2;

struct nfsv3_time {
        u_int32_t       nfsv3_sec;
        u_int32_t       nfsv3_nsec;
};
typedef struct nfsv3_time       nfstime3;

/*
 * Quads are defined as arrays of 2 longs to ensure dense packing for the
 * protocol and to facilitate xdr conversion.
 */
struct nfs_uquad {
        u_int32_t       nfsuquad[2];
};
typedef struct nfs_uquad        nfsuint64;

/*
 * Used to convert between two u_longs and a u_quad_t.
 */
union nfs_quadconvert {
        u_int32_t       lval[2];
        u_quad_t        qval;
};
typedef union nfs_quadconvert   nfsquad_t;

/*
 * NFS Version 3 special file number.
 */
struct nfsv3_spec {
        u_int32_t       specdata1;
        u_int32_t       specdata2;
};
typedef struct nfsv3_spec       nfsv3spec;

/*
 * File attributes and setable attributes. These structures cover both
 * NFS version 2 and the version 3 protocol. Note that the union is only
 * used so that one pointer can refer to both variants. These structures
 * go out on the wire and must be densely packed, so no quad data types
 * are used. (all fields are longs or u_longs or structures of same)
 * NB: You can't do sizeof(struct nfs_fattr), you must use the
 *     NFSX_FATTR(v3) macro.
 */
struct nfs_fattr {
        u_int32_t       fa_type;
        u_int32_t       fa_mode;
        u_int32_t       fa_nlink;
        u_int32_t       fa_uid;
        u_int32_t       fa_gid;
        union {
                struct {
                        u_int32_t       nfsv2fa_size;
                        u_int32_t       nfsv2fa_blocksize;
                        u_int32_t       nfsv2fa_rdev;
                        u_int32_t       nfsv2fa_blocks;
                        u_int32_t       nfsv2fa_fsid;
                        u_int32_t       nfsv2fa_fileid;
                        nfstime2        nfsv2fa_atime;
                        nfstime2        nfsv2fa_mtime;
                        nfstime2        nfsv2fa_ctime;
                } fa_nfsv2;
                struct {
                        nfsuint64       nfsv3fa_size;
                        nfsuint64       nfsv3fa_used;
                        nfsv3spec       nfsv3fa_rdev;
                        nfsuint64       nfsv3fa_fsid;
                        nfsuint64       nfsv3fa_fileid;
                        nfstime3        nfsv3fa_atime;
                        nfstime3        nfsv3fa_mtime;
                        nfstime3        nfsv3fa_ctime;
                } fa_nfsv3;
        } fa_un;
};

/* and some ugly defines for accessing union components */
#define fa2_size                fa_un.fa_nfsv2.nfsv2fa_size
#define fa2_blocksize           fa_un.fa_nfsv2.nfsv2fa_blocksize
#define fa2_rdev                fa_un.fa_nfsv2.nfsv2fa_rdev
#define fa2_blocks              fa_un.fa_nfsv2.nfsv2fa_blocks
#define fa2_fsid                fa_un.fa_nfsv2.nfsv2fa_fsid
#define fa2_fileid              fa_un.fa_nfsv2.nfsv2fa_fileid
#define fa2_atime               fa_un.fa_nfsv2.nfsv2fa_atime
#define fa2_mtime               fa_un.fa_nfsv2.nfsv2fa_mtime
#define fa2_ctime               fa_un.fa_nfsv2.nfsv2fa_ctime
#define fa3_size                fa_un.fa_nfsv3.nfsv3fa_size
#define fa3_used                fa_un.fa_nfsv3.nfsv3fa_used
#define fa3_rdev                fa_un.fa_nfsv3.nfsv3fa_rdev
#define fa3_fsid                fa_un.fa_nfsv3.nfsv3fa_fsid
#define fa3_fileid              fa_un.fa_nfsv3.nfsv3fa_fileid
#define fa3_atime               fa_un.fa_nfsv3.nfsv3fa_atime
#define fa3_mtime               fa_un.fa_nfsv3.nfsv3fa_mtime
#define fa3_ctime               fa_un.fa_nfsv3.nfsv3fa_ctime

struct nfsv2_sattr {
        u_int32_t       sa_mode;
        u_int32_t       sa_uid;
        u_int32_t       sa_gid;
        u_int32_t       sa_size;
        nfstime2        sa_atime;
        nfstime2        sa_mtime;
};

/*
 * NFS Version 3 sattr structure for the new node creation case.
 */
struct nfsv3_sattr {
        u_int32_t       sa_modetrue;
        u_int32_t       sa_mode;
        u_int32_t       sa_uidfalse;
        u_int32_t       sa_gidfalse;
        u_int32_t       sa_sizefalse;
        u_int32_t       sa_atimetype;
        nfstime3        sa_atime;
        u_int32_t       sa_mtimetype;
        nfstime3        sa_mtime;
};

struct nfs_statfs {
        union {
                struct {
                        u_int32_t       nfsv2sf_tsize;
                        u_int32_t       nfsv2sf_bsize;
                        u_int32_t       nfsv2sf_blocks;
                        u_int32_t       nfsv2sf_bfree;
                        u_int32_t       nfsv2sf_bavail;
                } sf_nfsv2;
                struct {
                        nfsuint64       nfsv3sf_tbytes;
                        nfsuint64       nfsv3sf_fbytes;
                        nfsuint64       nfsv3sf_abytes;
                        nfsuint64       nfsv3sf_tfiles;
                        nfsuint64       nfsv3sf_ffiles;
                        nfsuint64       nfsv3sf_afiles;
                        u_int32_t       nfsv3sf_invarsec;
                } sf_nfsv3;
        } sf_un;
};

#define sf_tsize        sf_un.sf_nfsv2.nfsv2sf_tsize
#define sf_bsize        sf_un.sf_nfsv2.nfsv2sf_bsize
#define sf_blocks       sf_un.sf_nfsv2.nfsv2sf_blocks
#define sf_bfree        sf_un.sf_nfsv2.nfsv2sf_bfree
#define sf_bavail       sf_un.sf_nfsv2.nfsv2sf_bavail
#define sf_tbytes       sf_un.sf_nfsv3.nfsv3sf_tbytes
#define sf_fbytes       sf_un.sf_nfsv3.nfsv3sf_fbytes
#define sf_abytes       sf_un.sf_nfsv3.nfsv3sf_abytes
#define sf_tfiles       sf_un.sf_nfsv3.nfsv3sf_tfiles
#define sf_ffiles       sf_un.sf_nfsv3.nfsv3sf_ffiles
#define sf_afiles       sf_un.sf_nfsv3.nfsv3sf_afiles
#define sf_invarsec     sf_un.sf_nfsv3.nfsv3sf_invarsec

struct nfsv3_fsinfo {
        u_int32_t       fs_rtmax;
        u_int32_t       fs_rtpref;
        u_int32_t       fs_rtmult;
        u_int32_t       fs_wtmax;
        u_int32_t       fs_wtpref;
        u_int32_t       fs_wtmult;
        u_int32_t       fs_dtpref;
        nfsuint64       fs_maxfilesize;
        nfstime3        fs_timedelta;
        u_int32_t       fs_properties;
};

struct nfsv3_pathconf {
        u_int32_t       pc_linkmax;
        u_int32_t       pc_namemax;
        u_int32_t       pc_notrunc;
        u_int32_t       pc_chownrestricted;
        u_int32_t       pc_caseinsensitive;
        u_int32_t       pc_casepreserving;
};

#endif