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nuttx/fs/nfs/nfs_proto.h
patacongo b356619d7c NFS... add logic to truncate files if needed on open 
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4843 42af7a65-404d-4744-a932-0658087f49c3
2012-06-14 18:04:39 +00:00

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/****************************************************************************
* fs/nfs/nfs_proto.h
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Copyright (C) 2012 Jose Pablo Rojas Vargas. All rights reserved.
* Author: Jose Pablo Rojas Vargas <jrojas@nx-engineering.com>
* Gregory Nutt <gnutt@nuttx.org>
*
* Leveraged from OpenBSD:
*
* 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.
* 3. 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.
*
****************************************************************************/
#ifndef __FS_NFS_NFS_PROTO_H
#define __FS_NFS_NFS_PROTO_H
/****************************************************************************
* Included Files
****************************************************************************/
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* 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_VER4 4
#define NFS_MAXDGRAMDATA 32768
#define MAXBSIZE 64000
#define NFS_MAXDATA MAXBSIZE
#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 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 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
/* 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
/* 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
/* Conversion macros */
#define vtonfsv3_mode(m) txdr_unsigned((m) & 07777)
#define nfstov_mode(a) (fxdr_unsigned(u_int16_t, (a))&07777)
#define vtonfsv3_type(a) txdr_unsigned(nfsv3_type[((int32_t)(a))])
#define nfsv3tov_type(a) nv3tov_type[fxdr_unsigned(uint32_t,(a))&0x7]
/* Mode bit values */
#define NFSMODE_IXOTH (1 << 0) /* Execute permission for others on a file */
#define NFSMODE_IWOTH (1 << 1) /* Write permission for others */
#define NFSMODE_IROTH (1 << 2) /* Read permission for others */
#define NFSMODE_IXGRP (1 << 3) /* Execute permission for group on a file */
#define NFSMODE_IWGRP (1 << 4) /* Write permission for group */
#define NFSMODE_IRGRP (1 << 5) /* Read permission for group */
#define NFSMODE_IXUSR (1 << 6) /* Execute permission for owner on a file */
#define NFSMODE_IWUSR (1 << 7) /* Write permission for owner */
#define NFSMODE_IRUSR (1 << 8) /* Read permission for owner */
#define NFSMODE_SAVETEXT (1 << 9) /* Save swapped text */
#define NFSMODE_ISGID (1 << 10) /* Set group ID on execution */
#define NFSMODE_ISUID (1 << 11) /* Set user ID on execution */
/* File identifier */
#define MAXFIDSZ 16
/****************************************************************************
* Public Types
****************************************************************************/
/* File types */
typedef enum
{
NFNON = 0, /* Unknown type */
NFREG = 1, /* Regular file */
NFDIR = 2, /* Directory */
NFBLK = 3, /* Block special device file */
NFCHR = 4, /* Character special device file */
NFLNK = 5, /* Symbolic link */
NFSOCK = 6, /* Socket */
NFFIFO = 7 /* Named FIFO */
} nfstype;
/* File Handle variable is up to 64 bytes for version 3. This structures a
* ariable sized and are provided only for setting aside maximum memory
* allocations for a file handle.
*/
struct nfsfh
{
uint8_t fh_bytes[NFSX_V3FHMAX];
};
typedef struct nfsfh nfsfh_t;
#define SIZEOF_nfsfh_t(n) (n)
struct nfsv3_time
{
uint32_t nfsv3_sec;
uint32_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
{
uint32_t nfsuquad[2];
};
typedef struct nfs_uquad nfsuint64;
/* NFS Version 3 special file number. */
struct nfsv3_spec
{
uint32_t specdata1;
uint32_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)
*/
struct nfs_fattr
{
uint32_t fa_type;
uint32_t fa_mode;
uint32_t fa_nlink;
uint32_t fa_uid;
uint32_t fa_gid;
nfsuint64 fa_size;
nfsuint64 fa_used;
nfsv3spec fa_rdev;
nfsuint64 fa_fsid;
nfsuint64 fa_fileid;
nfstime3 fa_atime;
nfstime3 fa_mtime;
nfstime3 fa_ctime;
};
/* NFS Version 3 sattr structure for the new node creation case. This is the
* maximum size of the attributes; the actual size may vary if values are not
* include.
*/
struct nfsv3_sattr
{
uint32_t sa_modefollows; /* TRUE: Mode value follows */
uint32_t sa_mode; /* Mode value */
uint32_t sa_uidfollows; /* TRUE: Uid value follows */
uint32_t sa_uid; /* Uid value */
uint32_t sa_gidfollows; /* TRUE: Mode value follows */
uint32_t sa_gid; /* Mode value */
uint32_t sa_sizefollows; /* TRUE: Size value follows */
uint32_t sa_size; /* Size value */
uint32_t sa_atimetype; /* Don't change, use server timer, or use client time */
nfstime3 sa_atime; /* Client time */
uint32_t sa_mtimetype; /* Don't change, use server timer, or use client time */
nfstime3 sa_mtime; /* Client time */
};
struct nfs_statfs
{
struct nfs_fattr obj_attributes;
nfsuint64 sf_tbytes;
nfsuint64 sf_fbytes;
nfsuint64 sf_abytes;
nfsuint64 sf_tfiles;
nfsuint64 sf_ffiles;
nfsuint64 sf_afiles;
uint32_t sf_invarsec;
};
struct post_attr
{
uint32_t obj_attributesfalse;
struct nfs_fattr attributes;
};
struct nfsv3_fsinfo
{
//struct post_attr obj_attributes;
uint32_t obj_attributesfalse;
uint32_t fs_rtmax;
uint32_t fs_rtpref;
uint32_t fs_rtmult;
uint32_t fs_wtmax;
uint32_t fs_wtpref;
uint32_t fs_wtmult;
uint32_t fs_dtpref;
nfsuint64 fs_maxfilesize;
nfstime3 fs_timedelta;
uint32_t fs_properties;
};
/* NFS procedures args */
struct wcc_attr
{
nfsuint64 size;
nfstime3 mtime;
nfstime3 ctime;
};
struct wcc_data
{
uint32_t wcc_attr_follows; /* True if data follows */
struct wcc_attr before;
uint32_t nfs_attr_follow; /* True if attributes present */
struct nfs_fattr after;
};
struct file_handle
{
uint32_t length;
nfsfh_t handle;
};
#define SIZEOF_file_handle(n) (sizeof(uint32_t) + SIZEOF_nfsfh_t(n))
struct diropargs3
{
struct file_handle fhandle; /* Variable length */
uint32_t length; /* Size of name[] */
uint32_t name[(NAME_MAX+3) >> 2]; /* Variable length */
};
struct CREATE3args
{
struct diropargs3 where;
uint32_t create_mode;
struct nfsv3_sattr how;
};
struct CREATE3resok
{
uint32_t handle_follows; /* True, handle follows */
struct file_handle fhandle; /* Variable length */
uint32_t attributes_follows; /* True, attributes follows */
struct nfs_fattr attributes; /* File attributes */
struct wcc_data dir_wcc;
};
/* The actual size of the lookup argument is variable. These structures are, therefore,
* only useful in setting aside maximum memory usage for the LOOKUP arguments.
*/
struct LOOKUP3filename
{
uint32_t namelen; /* Size of name[] */
uint32_t name[(NAME_MAX+3) >> 2]; /* Variable length */
};
struct LOOKUP3args
{
struct file_handle dirhandle; /* Variable length */
struct LOOKUP3filename name; /* Variable length */
};
struct SETATTR3args
{
struct file_handle fhandle; /* Variable length */
struct nfsv3_sattr new_attributes; /* Variable length */
uint32_t guard; /* Guard value */
};
struct SETATTR3resok
{
struct wcc_data wcc_data;
};
/* Actual size of LOOKUP3args */
#define SIZEOF_LOOKUP3filename(b) (sizeof(uint32_t) + (((b)+3) & ~3))
#define SIZEOF_LOOKUP3args(a,b) (SIZEOF_file_handle(a) + SIZEOF_LOOKUP3filename(b))
struct LOOKUP3resok
{
struct file_handle fhandle;
uint32_t obj_attributes_follow;
struct nfs_fattr obj_attributes;
uint32_t dir_attributes_follow;
struct nfs_fattr dir_attributes;
};
struct READ3args
{
struct file_handle fhandle; /* Variable length */
uint64_t offset;
uint32_t count;
};
struct nfs_rdhdr_s
{
uint32_t attributes_follow;
struct nfs_fattr attributes; /* Will not be present if attributes_follow == 0 */
uint32_t count; /* Number of bytes read */
uint32_t eof; /* Non-zero if at the end of file */
uint32_t length; /* Length of data (same as count?) */
};
struct READ3resok
{
struct nfs_rdhdr_s hdr;
uint8_t data[1]; /* Actual data size depends on count */
};
#define SIZEOF_READ3resok(n) (sizeof(struct nfs_rdhdr_s) + (n))
struct nfs_wrhdr_s
{
struct file_handle fhandle; /* Variable length */
uint64_t offset;
uint32_t count;
uint32_t stable;
};
struct WRITE3args
{
struct nfs_wrhdr_s hdr;
uint8_t data[1]; /* Actual data size depends on count */
};
#define SIZEOF_WRITE3args(n) (sizeof(struct nfs_wrhdr_s) + (n))
struct WRITE3resok
{
struct wcc_data file_wcc;
uint32_t count;
uint32_t committed;
uint8_t verf[NFSX_V3WRITEVERF];
};
struct REMOVE3args
{
struct diropargs3 object;
};
struct REMOVE3resok
{
struct wcc_data dir_wcc;
};
struct RENAME3args
{
struct diropargs3 from;
struct diropargs3 to;
};
struct RENAME3resok
{
struct wcc_data fromdir_wcc;
struct wcc_data todir_wcc;
};
struct MKDIR3args
{
struct diropargs3 where;
struct nfsv3_sattr how;
};
struct MKDIR3resok
{
uint32_t handle_follows; /* True, handle follows */
struct file_handle fhandle; /* Variable length */
uint32_t attributes_follows; /* True, attributes follows */
struct nfs_fattr attributes; /* Directory attributes */
struct wcc_data dir_wcc;
};
struct RMDIR3args
{
struct diropargs3 object;
};
struct RMDIR3resok
{
struct wcc_data dir_wcc;
};
/* The actual size of the lookup argument is variable. This structures is, therefore,
* only useful in setting aside maximum memory usage for the LOOKUP arguments.
*/
struct READDIR3args
{
struct file_handle dir; /* Variable length */
nfsuint64 cookie;
uint8_t cookieverf[NFSX_V3COOKIEVERF];
uint32_t count;
};
/* The READDIR reply is variable length and consists of multiple entries, each
* of form:
*
* EOF - OR -
*
* File ID (8 bytes)
* Name length (4 bytes)
* Name string (varaiable size but in multiples of 4 bytes)
* Cookie (8 bytes)
* next entry (4 bytes)
*/
struct READDIR3resok
{
uint32_t attributes_follow;
struct nfs_fattr dir_attributes;
uint8_t cookieverf[NFSX_V3COOKIEVERF];
uint32_t value_follows;
uint32_t reply[1]; /* Variable length reply begins here */
};
struct FS3args
{
struct file_handle fsroot;
};
#endif /* __FS_NFS_NFS_PROTO_H */
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