/*
* linux/fs/nfs/nfs3xdr.c
*
* XDR functions to encode/decode NFSv3 RPC arguments and results.
*
* Copyright (C) 1996, 1997 Olaf Kirch
*/
#include <linux/param.h>
#include <linux/time.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/utsname.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/in.h>
#include <linux/pagemap.h>
#include <linux/proc_fs.h>
#include <linux/kdev_t.h>
#include <linux/sunrpc/clnt.h>
#include <linux/nfs.h>
#include <linux/nfs3.h>
#include <linux/nfs_fs.h>
#include <linux/nfsacl.h>
#include "internal.h"
#define NFSDBG_FACILITY NFSDBG_XDR
/* Mapping from NFS error code to "errno" error code. */
#define errno_NFSERR_IO EIO
/*
* Declare the space requirements for NFS arguments and replies as
* number of 32bit-words
*/
#define NFS3_fhandle_sz (1+16)
#define NFS3_fh_sz (NFS3_fhandle_sz) /* shorthand */
#define NFS3_sattr_sz (15)
#define NFS3_filename_sz (1+(NFS3_MAXNAMLEN>>2))
#define NFS3_path_sz (1+(NFS3_MAXPATHLEN>>2))
#define NFS3_fattr_sz (21)
#define NFS3_wcc_attr_sz (6)
#define NFS3_pre_op_attr_sz (1+NFS3_wcc_attr_sz)
#define NFS3_post_op_attr_sz (1+NFS3_fattr_sz)
#define NFS3_wcc_data_sz (NFS3_pre_op_attr_sz+NFS3_post_op_attr_sz)
#define NFS3_fsstat_sz
#define NFS3_fsinfo_sz
#define NFS3_pathconf_sz
#define NFS3_entry_sz (NFS3_filename_sz+3)
#define NFS3_sattrargs_sz (NFS3_fh_sz+NFS3_sattr_sz+3)
#define NFS3_diropargs_sz (NFS3_fh_sz+NFS3_filename_sz)
#define NFS3_accessargs_sz (NFS3_fh_sz+1)
#define NFS3_readlinkargs_sz (NFS3_fh_sz)
#define NFS3_readargs_sz (NFS3_fh_sz+3)
#define NFS3_writeargs_sz (NFS3_fh_sz+5)
#define NFS3_createargs_sz (NFS3_diropargs_sz+NFS3_sattr_sz)
#define NFS3_mkdirargs_sz (NFS3_diropargs_sz+NFS3_sattr_sz)
#define NFS3_symlinkargs_sz (NFS3_diropargs_sz+1+NFS3_sattr_sz)
#define NFS3_mknodargs_sz (NFS3_diropargs_sz+2+NFS3_sattr_sz)
#define NFS3_renameargs_sz (NFS3_diropargs_sz+NFS3_diropargs_sz)
#define NFS3_linkargs_sz (NFS3_fh_sz+NFS3_diropargs_sz)
#define NFS3_readdirargs_sz (NFS3_fh_sz+2)
#define NFS3_commitargs_sz (NFS3_fh_sz+3)
#define NFS3_attrstat_sz (1+NFS3_fattr_sz)
#define NFS3_wccstat_sz (1+NFS3_wcc_data_sz)
#define NFS3_lookupres_sz (1+NFS3_fh_sz+(2 * NFS3_post_op_attr_sz))
#define NFS3_accessres_sz (1+NFS3_post_op_attr_sz+1)
#define NFS3_readlinkres_sz (1+NFS3_post_op_attr_sz+1)
#define NFS3_readres_sz (1+NFS3_post_op_attr_sz+3)
#define NFS3_writeres_sz (1+NFS3_wcc_data_sz+4)
#define NFS3_createres_sz (1+NFS3_fh_sz+NFS3_post_op_attr_sz+NFS3_wcc_data_sz)
#define NFS3_renameres_sz (1+(2 * NFS3_wcc_data_sz))
#define NFS3_linkres_sz (1+NFS3_post_op_attr_sz+NFS3_wcc_data_sz)
#define NFS3_readdirres_sz (1+NFS3_post_op_attr_sz+2)
#define NFS3_fsstatres_sz (1+NFS3_post_op_attr_sz+13)
#define NFS3_fsinfores_sz (1+NFS3_post_op_attr_sz+12)
#define NFS3_pathconfres_sz (1+NFS3_post_op_attr_sz+6)
#define NFS3_commitres_sz (1+NFS3_wcc_data_sz+2)
#define ACL3_getaclargs_sz (NFS3_fh_sz+1)
#define ACL3_setaclargs_sz (NFS3_fh_sz+1+2*(2+5*3))
#define ACL3_getaclres_sz (1+NFS3_post_op_attr_sz+1+2*(2+5*3))
#define ACL3_setaclres_sz (1+NFS3_post_op_attr_sz)
/*
* Map file type to S_IFMT bits
*/
static struct {
unsigned int mode;
unsigned int nfs2type;
} nfs_type2fmt[] = {
{ 0, NFNON },
{ S_IFREG, NFREG },
{ S_IFDIR, NFDIR },
{ S_IFBLK, NFBLK },
{ S_IFCHR, NFCHR },
{ S_IFLNK, NFLNK },
{ S_IFSOCK, NFSOCK },
{ S_IFIFO, NFFIFO },
{ 0, NFBAD }
};
/*
* Common NFS XDR functions as inlines
*/
static inline __be32 *
xdr_encode_fhandle(__be32 *p, struct nfs_fh *fh)
{
return xdr_encode_array(p, fh->data, fh->size);
}
static inline __be32 *
xdr_decode_fhandle(__be32 *p, struct nfs_fh *fh)
{
if ((fh->size = ntohl(*p++)) <= NFS3_FHSIZE) {
memcpy(fh->data, p, fh->size);
return p + XDR_QUADLEN(fh->size);
}
return NULL;
}
/*
* Encode/decode time.
*/
static inline __be32 *
xdr_encode_time3(__be32 *p, struct timespec *timep)
{
*p++ = htonl(timep->tv_sec);
*p++ = htonl(timep->tv_nsec);
return p;
}
static inline __be32 *
xdr_decode_time3(__be32 *p, struct timespec *timep)
{
timep->tv_sec = ntohl(*p++);
timep->tv_nsec = ntohl(*p++);
return p;
}
static __be32 *
xdr_decode_fattr(__be32 *p, struct nfs_fattr *fattr)
{
unsigned int type, major, minor;
int fmode;
type = ntohl(*p++);
if (type >= NF3BAD)
type =