/*
* Copyright (C) 2013 Marin Hannache <ipxe@mareo.fr>.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include <errno.h>
#include <libgen.h>
#include <byteswap.h>
#include <ipxe/time.h>
#include <ipxe/iobuf.h>
#include <ipxe/open.h>
#include <ipxe/features.h>
#include <ipxe/nfs.h>
#include <ipxe/oncrpc.h>
#include <ipxe/oncrpc_iob.h>
#include <ipxe/portmap.h>
#include <ipxe/mount.h>
#include <ipxe/settings.h>
/** @file
*
* Network File System protocol
*
*/
/** NFS LOOKUP procedure */
#define NFS_LOOKUP 3
/** NFS READLINK procedure */
#define NFS_READLINK 5
/** NFS READ procedure */
#define NFS_READ 6
/**
* Extract a file handle from the beginning of an I/O buffer
*
* @v io_buf I/O buffer
* @v fh File handle
* @ret size Size of the data read
*/
size_t nfs_iob_get_fh ( struct io_buffer *io_buf, struct nfs_fh *fh ) {
fh->size = oncrpc_iob_get_int ( io_buf );
if ( fh->size > 64 )
return sizeof ( uint32_t );
memcpy (fh->fh, io_buf->data, fh->size );
iob_pull ( io_buf, fh->size );
return fh->size + sizeof ( uint32_t );
}
/**
* Add a file handle to the end of an I/O buffer
*
* @v io_buf I/O buffer
* @v fh File handle
* @ret size Size of the data written
*/
size_t nfs_iob_add_fh ( struct io_buffer *io_buf, const struct nfs_fh *fh ) {
size_t s;
s = oncrpc_iob_add_int ( io_buf, fh->size );
memcpy ( iob_put ( io_buf, fh->size ), &fh->fh, fh->size );
return s + fh->size;
}
/**
* Send a LOOKUP request
*
* @v intf Interface to send the request on
* @v session ONC RPC session
* @v fh The file handle of the the directory
* @v filename The file name
* @ret rc Return status code
*/
int nfs_lookup ( struct interface *intf, struct oncrpc_session *session,
const struct nfs_fh *fh, const char *filename ) {
struct oncrpc_field fields[] = {
ONCRPC_SUBFIELD ( array, fh->size, &fh->fh ),
ONCRPC_FIELD ( str, filename ),
ONCRPC_FIELD_END,
};
return oncrpc_call ( intf, session, NFS_LOOKUP, fields );
}
/**
* Send a READLINK request
*
* @v intf Interface to send the request on
* @v session ONC RPC session
* @v fh The symlink file handle
* @ret rc Return status code
*/
int nfs_readlink ( struct interface *intf, struct oncrpc_session *session,
const struct nfs_fh *fh ) {
struct oncrpc_field fields[] = {
ONCRPC_SUBFIELD ( array, fh->size, &fh->fh ),
ONCRPC_FIELD_END,
};
return oncrpc_call ( intf, session, NFS_READLINK, fields );
}
/**
* Send a READ request
*
* @v intf Interface to send the request on
* @v session ONC RPC session
* @v fh The file handle
* @v offset Offset
* @v count Byte count
* @ret rc Return status code
*/
int nfs_read ( struct interface *intf, struct oncrpc_session *session,
const struct nfs_fh *fh, uint64_t offset, uint32_t count ) {
struct oncrpc_field fields[] = {
ONCRPC_SUBFIELD ( array, fh->size, &fh->fh ),
ONCRPC_FIELD ( int64, offset ),
ONCRPC_FIELD ( int32, count ),
ONCRPC_FIELD_END,
};
return oncrpc_call ( intf, session, NFS_READ, fields );
}
/**
* Parse a LOOKUP reply
*
* @v lookup_reply A structure where the data will be saved
* @v reply The ONC RPC reply to get data from
* @ret rc Return status code
*/
int nfs_get_lookup_reply ( struct nfs_lookup_reply *lookup_reply,
struct oncrpc_reply *reply ) {
if ( ! lookup_reply || ! reply )
return -EINVAL;
lookup_reply->status = oncrpc_iob_get_int ( reply->data );
switch ( lookup_reply->status )
{
case NFS3_OK:
break;
case NFS3ERR_PERM:
return -EPERM;
case NFS3ERR_NOENT:
return -ENOENT;
case NFS3ERR_IO:
return -EIO;
case NFS3ERR_ACCES:
return -EACCES;
case NFS3ERR_NOTDIR:
return -ENOTDIR;
case NFS3ERR_NAMETOOLONG:
return -ENAMETOOLONG;
case NFS3ERR_STALE:
return -ESTALE;
case NFS3ERR_BADHANDLE:
case NFS3ERR_SERVERFAULT:
default:
return -EPROTO;
}
nfs_iob_get_fh ( reply->data, &lookup_reply->fh );
if ( oncrpc_iob_get_int ( reply->data ) == 1 )
lookup_reply->ent_type = oncrpc_iob_get_int ( reply->data );
return 0;
}
/**
* Parse a READLINK reply
*
* @v readlink_reply A structure where the data will be saved
* @v reply The ONC RPC reply to get data from
* @ret rc Return status code
*/
int nfs_get_readlink_reply ( struct nfs_readlink_reply *readlink_reply,
struct oncrpc_reply *reply ) {
if ( ! readlink_reply || ! reply )
return -EINVAL;
readlink_reply->status = oncrpc_iob_get_int ( reply->data );
switch ( readlink_reply->status )
{
case NFS3_OK:
break;
case NFS3ERR_IO:
return -EIO;
case NFS3ERR_ACCES:
return -EACCES;
case NFS3ERR_INVAL:
return -EINVAL;
case NFS3ERR_NOTSUPP:
return -ENOTSUP;
case NFS3ERR_STALE:
return -ESTALE;
case NFS3ERR_BADHANDLE:
case NFS3ERR_SERVERFAULT:
default:
return -EPROTO;
}
if ( oncrpc_iob_get_int ( reply->data ) == 1 )
iob_pull ( reply->data, 5 * sizeof ( uint32_t ) +
8 * sizeof ( uint64_t ) );
readlink_reply->path_len = oncrpc_iob_get_int ( reply->data );
readlink_reply->path = reply->data->data;
return 0;
}
/**
* Parse a READ reply
*
* @v read_reply A structure where the data will be saved
* @v reply The ONC RPC reply to get data from
* @ret rc Return status code
*/
int nfs_get_read_reply ( struct nfs_read_reply *read_reply,
struct oncrpc_reply *reply ) {
if ( ! read_reply || ! reply )
return -EINVAL;
read_reply->status = oncrpc_iob_get_int ( reply->data );
switch ( read_reply->status )
{
case NFS3_OK:
break;
case NFS3ERR_PERM:
return -EPERM;
case NFS3ERR_NOENT:
return -ENOENT;
case NFS3ERR_IO:
return -EIO;
case NFS3ERR_NXIO:
return -ENXIO;
case NFS3ERR_ACCES:
return -EACCES;
case NFS3ERR_INVAL:
return -EINVAL;
case NFS3ERR_STALE:
return -ESTALE;
case NFS3ERR_BADHANDLE:
case NFS3ERR_SERVERFAULT:
default:
return -EPROTO;
}
if ( oncrpc_iob_get_int ( reply->data ) == 1 )
{
iob_pull ( reply->data, 5 * sizeof ( uint32_t ) );
read_reply->filesize = oncrpc_iob_get_int64 ( reply->data );
iob_pull ( reply->data, 7 * sizeof ( uint64_t ) );
}
read_reply->count = oncrpc_iob_get_int ( reply->data );
read_reply->eof = oncrpc_iob_get_int ( reply->data );
read_reply->data_len = oncrpc_iob_get_int ( reply->data );
read_reply->data = reply->data->data;
if ( read_reply->count != read_reply->data_len )
return -EPROTO;
return 0;
}
