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- /*
- * 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;
- }
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