mirror of https://github.com/ipxe/ipxe.git
723 lines
17 KiB
C
723 lines
17 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/socket.h>
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#include <ipxe/tcpip.h>
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#include <ipxe/in.h>
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#include <ipxe/iobuf.h>
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#include <ipxe/xfer.h>
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#include <ipxe/open.h>
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#include <ipxe/uri.h>
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#include <ipxe/features.h>
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#include <ipxe/nfs.h>
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#include <ipxe/nfs_open.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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/** @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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FEATURE ( FEATURE_PROTOCOL, "NFS", DHCP_EB_FEATURE_NFS, 1 );
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#define NFS_RSIZE 100000
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enum nfs_pm_state {
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NFS_PORTMAP_NONE = 0,
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NFS_PORTMAP_MOUNTPORT,
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NFS_PORTMAP_NFSPORT,
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MFS_PORTMAP_CLOSED,
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};
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enum nfs_mount_state {
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NFS_MOUNT_NONE = 0,
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NFS_MOUNT_MNT,
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NFS_MOUNT_UMNT,
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NFS_MOUNT_CLOSED,
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};
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enum nfs_state {
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NFS_NONE = 0,
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NFS_LOOKUP,
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NFS_LOOKUP_SENT,
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NFS_READLINK,
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NFS_READLINK_SENT,
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NFS_READ,
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NFS_READ_SENT,
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NFS_CLOSED,
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};
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/**
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* A NFS request
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*
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*/
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struct nfs_request {
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/** Reference counter */
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struct refcnt refcnt;
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/** Data transfer interface */
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struct interface xfer;
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struct interface pm_intf;
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struct interface mount_intf;
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struct interface nfs_intf;
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enum nfs_pm_state pm_state;
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enum nfs_mount_state mount_state;
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enum nfs_state nfs_state;
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struct oncrpc_session pm_session;
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struct oncrpc_session mount_session;
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struct oncrpc_session nfs_session;
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struct oncrpc_cred_sys auth_sys;
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char * hostname;
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char * path;
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char * mountpoint;
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char * filename;
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size_t filename_offset;
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struct nfs_fh readlink_fh;
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struct nfs_fh current_fh;
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uint64_t file_offset;
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size_t remaining;
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int eof;
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};
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static void nfs_step ( struct nfs_request *nfs );
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/**
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* Free NFS request
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*
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* @v refcnt Reference counter
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*/
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static void nfs_free ( struct refcnt *refcnt ) {
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struct nfs_request *nfs;
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nfs = container_of ( refcnt, struct nfs_request, refcnt );
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DBGC ( nfs, "NFS_OPEN %p freed\n", nfs );
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free ( nfs->hostname );
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free ( nfs->path );
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free ( nfs->auth_sys.hostname );
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free ( nfs );
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}
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/**
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* Mark NFS operation as complete
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*
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* @v nfs NFS request
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* @v rc Return status code
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*/
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static void nfs_done ( struct nfs_request *nfs, int rc ) {
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if ( rc == 0 && nfs->nfs_state != NFS_CLOSED )
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rc = -ECONNRESET;
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DBGC ( nfs, "NFS_OPEN %p completed (%s)\n", nfs, strerror ( rc ) );
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free ( nfs->filename );
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intf_shutdown ( &nfs->xfer, rc );
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intf_shutdown ( &nfs->pm_intf, rc );
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intf_shutdown ( &nfs->mount_intf, rc );
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intf_shutdown ( &nfs->nfs_intf, rc );
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}
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static int nfs_connect ( struct interface *intf, uint16_t port,
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const char *hostname ) {
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struct sockaddr_tcpip peer;
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struct sockaddr_tcpip local;
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if ( ! intf || ! hostname || ! port )
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return -EINVAL;
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memset ( &peer, 0, sizeof ( peer ) );
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memset ( &local, 0, sizeof ( local ) );
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peer.st_port = htons ( port );
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/* Use a local port < 1024 to avoid using the 'insecure' option in
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* /etc/exports file. */
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local.st_flags = TCPIP_BIND_PRIVILEGED;
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return xfer_open_named_socket ( intf, SOCK_STREAM,
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( struct sockaddr * ) &peer, hostname,
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( struct sockaddr * ) &local );
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}
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static void nfs_pm_step ( struct nfs_request *nfs ) {
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int rc;
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if ( ! xfer_window ( &nfs->pm_intf ) )
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return;
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if ( nfs->pm_state == NFS_PORTMAP_NONE ) {
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DBGC ( nfs, "NFS_OPEN %p GETPORT call (mount)\n", nfs );
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rc = portmap_getport ( &nfs->pm_intf, &nfs->pm_session,
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ONCRPC_MOUNT, MOUNT_VERS,
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PORTMAP_PROTO_TCP );
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if ( rc != 0 )
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goto err;
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nfs->pm_state++;
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return;
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}
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if ( nfs->pm_state == NFS_PORTMAP_NFSPORT ) {
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DBGC ( nfs, "NFS_OPEN %p GETPORT call (nfs)\n", nfs );
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rc = portmap_getport ( &nfs->pm_intf, &nfs->pm_session,
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ONCRPC_NFS, NFS_VERS,
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PORTMAP_PROTO_TCP );
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if ( rc != 0 )
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goto err;
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return;
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}
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return;
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err:
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nfs_done ( nfs, rc );
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}
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static int nfs_pm_deliver ( struct nfs_request *nfs,
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struct io_buffer *io_buf,
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struct xfer_metadata *meta __unused ) {
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int rc;
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struct oncrpc_reply reply;
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struct portmap_getport_reply getport_reply;
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oncrpc_get_reply ( &nfs->pm_session, &reply, io_buf );
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if ( reply.accept_state != 0 )
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{
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rc = -EPROTO;
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goto err;
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}
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if ( nfs->pm_state == NFS_PORTMAP_MOUNTPORT ) {
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DBGC ( nfs, "NFS_OPEN %p got GETPORT reply (mount)\n", nfs );
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rc = portmap_get_getport_reply ( &getport_reply, &reply );
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if ( rc != 0 )
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goto err;
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rc = nfs_connect ( &nfs->mount_intf, getport_reply.port,
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nfs->hostname );
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if ( rc != 0 )
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goto err;
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nfs->pm_state++;
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nfs_pm_step ( nfs );
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goto done;
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}
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if ( nfs->pm_state == NFS_PORTMAP_NFSPORT ) {
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DBGC ( nfs, "NFS_OPEN %p got GETPORT reply (nfs)\n", nfs );
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rc = portmap_get_getport_reply ( &getport_reply, &reply );
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if ( rc != 0 )
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goto err;
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rc = nfs_connect ( &nfs->nfs_intf, getport_reply.port,
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nfs->hostname );
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if ( rc != 0 )
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goto err;
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intf_shutdown ( &nfs->pm_intf, 0 );
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nfs->pm_state++;
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goto done;
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}
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rc = -EPROTO;
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err:
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nfs_done ( nfs, rc );
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done:
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free_iob ( io_buf );
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return 0;
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}
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static void nfs_mount_step ( struct nfs_request *nfs ) {
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int rc;
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if ( ! xfer_window ( &nfs->mount_intf ) )
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return;
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if ( nfs->mount_state == NFS_MOUNT_NONE ) {
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DBGC ( nfs, "NFS_OPEN %p MNT call (%s)\n", nfs,
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nfs->mountpoint );
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rc = mount_mnt ( &nfs->mount_intf, &nfs->mount_session,
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nfs->mountpoint );
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if ( rc != 0 )
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goto err;
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nfs->mount_state++;
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return;
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}
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if ( nfs->mount_state == NFS_MOUNT_UMNT ) {
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DBGC ( nfs, "NFS_OPEN %p UMNT call\n", nfs );
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rc = mount_umnt ( &nfs->mount_intf, &nfs->mount_session,
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nfs->mountpoint );
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if ( rc != 0 )
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goto err;
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}
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return;
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err:
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nfs_done ( nfs, rc );
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}
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static int nfs_mount_deliver ( struct nfs_request *nfs,
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struct io_buffer *io_buf,
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struct xfer_metadata *meta __unused ) {
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int rc;
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char *sep;
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struct oncrpc_reply reply;
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struct mount_mnt_reply mnt_reply;
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oncrpc_get_reply ( &nfs->mount_session, &reply, io_buf );
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if ( reply.accept_state != 0 )
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{
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rc = -EPROTO;
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goto err;
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}
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if ( nfs->mount_state == NFS_MOUNT_MNT ) {
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DBGC ( nfs, "NFS_OPEN %p got MNT reply\n", nfs );
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rc = mount_get_mnt_reply ( &mnt_reply, &reply );
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if ( rc != 0 ) {
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if ( mnt_reply.status != MNT3ERR_NOTDIR )
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goto err;
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if ( strcmp ( nfs->mountpoint, "/" ) == 0 )
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goto err;
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sep = strrchr ( nfs->mountpoint, '/' );
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nfs->filename[-1] = '/';
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nfs->filename = sep + 1;
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*sep = '\0';
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DBGC ( nfs, "NFS_OPEN %p ENOTDIR received retrying" \
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"with %s\n", nfs, nfs->mountpoint );
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goto done;
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}
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/* We need to strdup() nfs->filename since the code handling
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* symlink resolution make the assumption that it can be
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* free()ed. */
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if ( ( nfs->filename = strdup ( nfs->filename ) ) == NULL )
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{
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rc = -ENOMEM;
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goto err;
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}
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nfs->current_fh = mnt_reply.fh;
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nfs->nfs_state = NFS_LOOKUP;
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nfs_step ( nfs );
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goto done;
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}
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if ( nfs->mount_state == NFS_MOUNT_UMNT ) {
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DBGC ( nfs, "NFS_OPEN %p got UMNT reply\n", nfs );
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nfs_done ( nfs, 0 );
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goto done;
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}
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rc = -EPROTO;
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err:
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nfs_done ( nfs, rc );
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done:
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free_iob ( io_buf );
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return 0;
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}
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|
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static void nfs_step ( struct nfs_request *nfs ) {
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int rc;
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char *path_component = NULL;
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|
|
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if ( ! xfer_window ( &nfs->nfs_intf ) )
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return;
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|
|
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if ( nfs->nfs_state == NFS_LOOKUP ) {
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while ( path_component == NULL || path_component[0] == '\0') {
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path_component = nfs->filename;
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while ( *nfs->filename != '\0' ) {
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nfs->filename_offset++;
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if ( *nfs->filename++ == '/' ) {
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|
*(nfs->filename - 1) = '\0';
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break;
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}
|
|
}
|
|
}
|
|
|
|
DBGC ( nfs, "NFS_OPEN %p LOOKUP call (%s)\n", nfs,
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path_component );
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|
|
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rc = nfs_lookup ( &nfs->nfs_intf, &nfs->nfs_session,
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&nfs->current_fh, path_component );
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if ( rc != 0 )
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|
goto err;
|
|
|
|
nfs->nfs_state++;
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return;
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}
|
|
|
|
|
|
if ( nfs->nfs_state == NFS_READLINK ) {
|
|
DBGC ( nfs, "NFS_OPEN %p READLINK call\n", nfs );
|
|
|
|
rc = nfs_readlink ( &nfs->nfs_intf, &nfs->nfs_session,
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&nfs->readlink_fh );
|
|
if ( rc != 0 )
|
|
goto err;
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|
|
|
nfs->nfs_state++;
|
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return;
|
|
}
|
|
|
|
if ( nfs->nfs_state == NFS_READ ) {
|
|
DBGC ( nfs, "NFS_OPEN %p READ call\n", nfs );
|
|
|
|
rc = nfs_read ( &nfs->nfs_intf, &nfs->nfs_session,
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|
&nfs->current_fh, nfs->file_offset,
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|
NFS_RSIZE );
|
|
if ( rc != 0 )
|
|
goto err;
|
|
|
|
nfs->nfs_state++;
|
|
return;
|
|
}
|
|
|
|
return;
|
|
err:
|
|
nfs_done ( nfs, rc );
|
|
}
|
|
|
|
static int nfs_deliver ( struct nfs_request *nfs,
|
|
struct io_buffer *io_buf,
|
|
struct xfer_metadata *meta __unused ) {
|
|
int rc;
|
|
struct oncrpc_reply reply;
|
|
|
|
if ( nfs->remaining == 0 ) {
|
|
oncrpc_get_reply ( &nfs->nfs_session, &reply, io_buf );
|
|
if ( reply.accept_state != 0 ) {
|
|
rc = -EPROTO;
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
if ( nfs->nfs_state == NFS_LOOKUP_SENT ) {
|
|
struct nfs_lookup_reply lookup_reply;
|
|
|
|
DBGC ( nfs, "NFS_OPEN %p got LOOKUP reply\n", nfs );
|
|
|
|
rc = nfs_get_lookup_reply ( &lookup_reply, &reply );
|
|
if ( rc != 0 )
|
|
goto err;
|
|
|
|
if ( lookup_reply.ent_type == NFS_ATTR_SYMLINK ) {
|
|
nfs->readlink_fh = lookup_reply.fh;
|
|
nfs->nfs_state = NFS_READLINK;
|
|
} else {
|
|
nfs->current_fh = lookup_reply.fh;
|
|
|
|
if ( nfs->filename[0] == '\0' )
|
|
nfs->nfs_state = NFS_READ;
|
|
else
|
|
nfs->nfs_state--;
|
|
}
|
|
|
|
nfs_step ( nfs );
|
|
goto done;
|
|
}
|
|
|
|
if ( nfs->nfs_state == NFS_READLINK_SENT ) {
|
|
char *new_filename;
|
|
struct nfs_readlink_reply readlink_reply;
|
|
|
|
DBGC ( nfs, "NFS_OPEN %p got READLINK reply\n", nfs );
|
|
|
|
rc = nfs_get_readlink_reply ( &readlink_reply, &reply );
|
|
if ( rc != 0 )
|
|
goto err;
|
|
|
|
if ( readlink_reply.path_len == 0 )
|
|
return -EINVAL;
|
|
|
|
if ( readlink_reply.path[0] == '/' ) {
|
|
if ( strncmp ( readlink_reply.path, nfs->mountpoint,
|
|
strlen ( nfs->mountpoint ) ) != 0 )
|
|
return -EINVAL;
|
|
|
|
/* The mountpoint part of the path is ended by a '/' */
|
|
if ( strlen ( nfs->mountpoint ) !=
|
|
readlink_reply.path_len ) {
|
|
readlink_reply.path += 1;
|
|
readlink_reply.path_len -= 1;
|
|
}
|
|
|
|
/* We are considering the last part of the absolute
|
|
* path as a relative path from the mountpoint.
|
|
*/
|
|
readlink_reply.path += strlen ( nfs->mountpoint );
|
|
readlink_reply.path_len -= strlen ( nfs->mountpoint );
|
|
}
|
|
|
|
new_filename = malloc ( readlink_reply.path_len +
|
|
strlen ( nfs->filename ) + 2 );
|
|
if ( ! new_filename ) {
|
|
rc = -ENOMEM;
|
|
goto err;
|
|
}
|
|
|
|
memcpy ( new_filename, readlink_reply.path,
|
|
readlink_reply.path_len );
|
|
strcpy ( new_filename + readlink_reply.path_len + 1,
|
|
nfs->filename );
|
|
new_filename[readlink_reply.path_len] = '/';
|
|
|
|
free ( nfs->filename - nfs->filename_offset );
|
|
nfs->filename = new_filename;
|
|
nfs->filename_offset = 0;
|
|
|
|
DBGC ( nfs, "NFS_OPEN %p new filename: %s\n", nfs,
|
|
nfs->filename );
|
|
|
|
nfs->nfs_state = NFS_LOOKUP;
|
|
nfs_step ( nfs );
|
|
goto done;
|
|
}
|
|
|
|
if ( nfs->nfs_state == NFS_READ_SENT ) {
|
|
if ( nfs->remaining == 0 ) {
|
|
DBGC ( nfs, "NFS_OPEN %p got READ reply\n", nfs );
|
|
|
|
struct nfs_read_reply read_reply;
|
|
|
|
rc = nfs_get_read_reply ( &read_reply, &reply );
|
|
if ( rc != 0 )
|
|
goto err;
|
|
|
|
if ( nfs->file_offset == 0 ) {
|
|
DBGC2 ( nfs, "NFS_OPEN %p size: %llu bytes\n",
|
|
nfs, read_reply.filesize );
|
|
|
|
xfer_seek ( &nfs->xfer, read_reply.filesize );
|
|
xfer_seek ( &nfs->xfer, 0 );
|
|
}
|
|
|
|
nfs->file_offset += read_reply.count;
|
|
nfs->remaining = read_reply.count;
|
|
nfs->eof = read_reply.eof;
|
|
}
|
|
|
|
size_t len = iob_len ( io_buf );
|
|
if ( len > nfs->remaining )
|
|
iob_unput ( io_buf, len - nfs->remaining );
|
|
|
|
nfs->remaining -= iob_len ( io_buf );
|
|
|
|
DBGC ( nfs, "NFS_OPEN %p got %zd bytes\n", nfs,
|
|
iob_len ( io_buf ) );
|
|
|
|
rc = xfer_deliver_iob ( &nfs->xfer, iob_disown ( io_buf ) );
|
|
if ( rc != 0 )
|
|
goto err;
|
|
|
|
if ( nfs->remaining == 0 ) {
|
|
if ( ! nfs->eof ) {
|
|
nfs->nfs_state--;
|
|
nfs_step ( nfs );
|
|
} else {
|
|
intf_shutdown ( &nfs->nfs_intf, 0 );
|
|
nfs->nfs_state++;
|
|
nfs->mount_state++;
|
|
nfs_mount_step ( nfs );
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
rc = -EPROTO;
|
|
err:
|
|
nfs_done ( nfs, rc );
|
|
done:
|
|
free_iob ( io_buf );
|
|
return 0;
|
|
}
|
|
|
|
/*****************************************************************************
|
|
* Interfaces
|
|
*
|
|
*/
|
|
|
|
static struct interface_operation nfs_xfer_operations[] = {
|
|
INTF_OP ( intf_close, struct nfs_request *, nfs_done ),
|
|
};
|
|
|
|
/** NFS data transfer interface descriptor */
|
|
static struct interface_descriptor nfs_xfer_desc =
|
|
INTF_DESC ( struct nfs_request, xfer, nfs_xfer_operations );
|
|
|
|
static struct interface_operation nfs_pm_operations[] = {
|
|
INTF_OP ( intf_close, struct nfs_request *, nfs_done ),
|
|
INTF_OP ( xfer_deliver, struct nfs_request *, nfs_pm_deliver ),
|
|
INTF_OP ( xfer_window_changed, struct nfs_request *, nfs_pm_step ),
|
|
};
|
|
|
|
static struct interface_descriptor nfs_pm_desc =
|
|
INTF_DESC ( struct nfs_request, pm_intf, nfs_pm_operations );
|
|
|
|
static struct interface_operation nfs_mount_operations[] = {
|
|
INTF_OP ( intf_close, struct nfs_request *, nfs_done ),
|
|
INTF_OP ( xfer_deliver, struct nfs_request *, nfs_mount_deliver ),
|
|
INTF_OP ( xfer_window_changed, struct nfs_request *, nfs_mount_step ),
|
|
};
|
|
|
|
static struct interface_descriptor nfs_mount_desc =
|
|
INTF_DESC ( struct nfs_request, mount_intf, nfs_mount_operations );
|
|
|
|
static struct interface_operation nfs_operations[] = {
|
|
INTF_OP ( intf_close, struct nfs_request *, nfs_done ),
|
|
INTF_OP ( xfer_deliver, struct nfs_request *, nfs_deliver ),
|
|
INTF_OP ( xfer_window_changed, struct nfs_request *, nfs_step ),
|
|
};
|
|
|
|
static struct interface_descriptor nfs_desc =
|
|
INTF_DESC_PASSTHRU ( struct nfs_request, nfs_intf, nfs_operations,
|
|
xfer );
|
|
|
|
/*****************************************************************************
|
|
*
|
|
* URI opener
|
|
*
|
|
*/
|
|
|
|
static int nfs_parse_uri ( struct nfs_request *nfs, const struct uri *uri ) {
|
|
int rc;
|
|
|
|
if ( ! uri || ! uri->host || ! uri->path )
|
|
return -EINVAL;
|
|
|
|
if ( ! ( nfs->path = strdup ( uri->path ) ) )
|
|
return -ENOMEM;
|
|
|
|
if ( ! ( nfs->hostname = strdup ( uri->host ) ) ) {
|
|
rc = -ENOMEM;
|
|
goto err_hostname;
|
|
}
|
|
|
|
nfs->filename = basename ( nfs->path );
|
|
nfs->mountpoint = dirname ( nfs->path );
|
|
|
|
if ( nfs->filename[0] == '\0' )
|
|
goto err_filename;
|
|
|
|
DBGC ( nfs, "NFS_OPEN %p URI parsed: (mountpoint=%s, filename=%s)\n",
|
|
nfs, nfs->mountpoint, nfs->filename );
|
|
|
|
return 0;
|
|
|
|
err_filename:
|
|
rc = -EINVAL;
|
|
free ( nfs->hostname );
|
|
err_hostname:
|
|
free ( nfs->path );
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* Initiate a NFS connection
|
|
*
|
|
* @v xfer Data transfer interface
|
|
* @v uri Uniform Resource Identifier
|
|
* @ret rc Return status code
|
|
*/
|
|
static int nfs_open ( struct interface *xfer, struct uri *uri ) {
|
|
int rc;
|
|
struct nfs_request *nfs;
|
|
|
|
nfs = zalloc ( sizeof ( *nfs ) );
|
|
if ( ! nfs )
|
|
return -ENOMEM;
|
|
|
|
rc = nfs_parse_uri( nfs, uri );
|
|
if ( rc != 0 )
|
|
goto err_uri;
|
|
|
|
rc = oncrpc_init_cred_sys ( &nfs->auth_sys );
|
|
if ( rc != 0 )
|
|
goto err_cred;
|
|
|
|
ref_init ( &nfs->refcnt, nfs_free );
|
|
intf_init ( &nfs->xfer, &nfs_xfer_desc, &nfs->refcnt );
|
|
intf_init ( &nfs->pm_intf, &nfs_pm_desc, &nfs->refcnt );
|
|
intf_init ( &nfs->mount_intf, &nfs_mount_desc, &nfs->refcnt );
|
|
intf_init ( &nfs->nfs_intf, &nfs_desc, &nfs->refcnt );
|
|
|
|
portmap_init_session ( &nfs->pm_session, &nfs->auth_sys.credential );
|
|
mount_init_session ( &nfs->mount_session, &nfs->auth_sys.credential );
|
|
nfs_init_session ( &nfs->nfs_session, &nfs->auth_sys.credential );
|
|
|
|
rc = nfs_connect ( &nfs->pm_intf, PORTMAP_PORT, nfs->hostname );
|
|
if ( rc != 0 )
|
|
goto err_connect;
|
|
|
|
/* Attach to parent interface, mortalise self, and return */
|
|
intf_plug_plug ( &nfs->xfer, xfer );
|
|
ref_put ( &nfs->refcnt );
|
|
|
|
return 0;
|
|
|
|
err_connect:
|
|
free ( nfs->auth_sys.hostname );
|
|
err_cred:
|
|
err_uri:
|
|
free ( nfs );
|
|
return rc;
|
|
}
|
|
|
|
/** NFS URI opener */
|
|
struct uri_opener nfs_uri_opener __uri_opener = {
|
|
.scheme = "nfs",
|
|
.open = nfs_open,
|
|
};
|