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