* Patch by Masami Komiy, 22 Feb 2004:

  Add support for NFS for file download

* Minor code cleanup

5 files changed, 872 insertions, 2 deletions

diff --git a/net/Makefile b/net/Makefile
index b899d7b2f2..cf25a0f33e 100644
--- a/net/Makefile
+++ b/net/Makefile
@@ -27,7 +27,7 @@ include $(TOPDIR)/config.mk
 
 LIB	= libnet.a
 
-OBJS	= net.o tftp.o bootp.o rarp.o eth.o
+OBJS	= net.o tftp.o bootp.o rarp.o eth.o nfs.o
 all:	$(LIB)
 
 $(LIB):	$(START) $(OBJS)
diff --git a/net/eth.c b/net/eth.c
index 177fab8ba1..7eae469684 100644
--- a/net/eth.c
+++ b/net/eth.c
@@ -155,7 +155,7 @@ int eth_initialize(bd_t *bis)
 #if defined(FEC_ENET) || defined(CONFIG_ETHER_ON_FCC)
 	fec_initialize(bis);
 #endif
-#if defined(CONFIG_MPC5XXX_FEC)
+#if defined(CONFIG_MPC5xxx_FEC)
 	mpc5xxx_fec_initialize(bis);
 #endif
 #if defined(CONFIG_SK98)
diff --git a/net/net.c b/net/net.c
index 39ffe8c47b..47c2007696 100644
--- a/net/net.c
+++ b/net/net.c
@@ -55,6 +55,15 @@
  *			  derived from our own IP address)
  *	We want:	- load the boot file
  *	Next step:	none
+ *
+ * NFS:
+ *
+ *	Prerequisites:	- own ethernet address
+ *			- own IP address
+ *			- name of bootfile (if unknown, we use a default name
+ *			  derived from our own IP address)
+ *	We want:	- load the boot file
+ *	Next step:	none
  */
 
 
@@ -65,6 +74,7 @@
 #include "bootp.h"
 #include "tftp.h"
 #include "rarp.h"
+#include "nfs.h"
 #ifdef CONFIG_STATUS_LED
 #include <status_led.h>
 #include <miiphy.h>
@@ -278,6 +288,9 @@ restart:
 	 */
 
 	switch (protocol) {
+#if (CONFIG_COMMANDS & CFG_CMD_NFS)
+	case NFS:
+#endif
 #if (CONFIG_COMMANDS & CFG_CMD_PING)
 	case PING:
 #endif
@@ -287,6 +300,9 @@ restart:
 		NetOurSubnetMask= getenv_IPaddr ("netmask");
 
 		switch (protocol) {
+#if (CONFIG_COMMANDS & CFG_CMD_NFS)
+		case NFS:
+#endif
 		case TFTP:
 			NetServerIP = getenv_IPaddr ("serverip");
 			break;
@@ -357,6 +373,11 @@ restart:
 			PingStart();
 			break;
 #endif
+#if (CONFIG_COMMANDS & CFG_CMD_NFS)
+		case NFS:
+			NfsStart();
+			break;
+#endif
 		default:
 			break;
 		}
@@ -919,6 +940,9 @@ static int net_check_prereq (proto_t protocol)
 			}
 			goto common;
 #endif
+#if (CONFIG_COMMANDS & CFG_CMD_NFS)
+	case NFS:
+#endif
 	case TFTP:
 			if (NetServerIP == 0) {
 				puts ("*** ERROR: `serverip' not set\n");
diff --git a/net/nfs.c b/net/nfs.c
new file mode 100644
index 0000000000..6f4a06ad04
--- /dev/null
+++ b/net/nfs.c
@@ -0,0 +1,772 @@
+/*
+ * NFS support driver - based on etherboot and U-BOOT's tftp.c
+ *
+ * Masami Komiya <mkomiya@sonare.it> 2004
+ *
+ */
+
+/* NOTE: the NFS code is heavily inspired by the NetBSD netboot code (read:
+ * large portions are copied verbatim) as distributed in OSKit 0.97.  A few
+ * changes were necessary to adapt the code to Etherboot and to fix several
+ * inconsistencies.  Also the RPC message preparation is done "by hand" to
+ * avoid adding netsprintf() which I find hard to understand and use.  */
+
+/* NOTE 2: Etherboot does not care about things beyond the kernel image, so
+ * it loads the kernel image off the boot server (ARP_SERVER) and does not
+ * access the client root disk (root-path in dhcpd.conf), which would use
+ * ARP_ROOTSERVER.  The root disk is something the operating system we are
+ * about to load needs to use.	This is different from the OSKit 0.97 logic.  */
+
+/* NOTE 3: Symlink handling introduced by Anselm M Hoffmeister, 2003-July-14
+ * If a symlink is encountered, it is followed as far as possible (recursion
+ * possible, maximum 16 steps). There is no clearing of ".."'s inside the
+ * path, so please DON'T DO THAT. thx. */
+
+#include <common.h>
+#include <command.h>
+#include <net.h>
+#include <malloc.h>
+#include "nfs.h"
+#include "bootp.h"
+
+/*#define NFS_DEBUG*/
+
+#if ((CONFIG_COMMANDS & CFG_CMD_NET) && (CONFIG_COMMANDS & CFG_CMD_NFS))
+
+#define HASHES_PER_LINE 65	/* Number of "loading" hashes per line	*/
+#define NFS_TIMEOUT 10
+
+static int fs_mounted = 0;
+static unsigned long rpc_id;
+static int nfs_offset = -1;
+static int nfs_len;
+
+static char dirfh[NFS_FHSIZE];	/* file handle of directory */
+static char filefh[NFS_FHSIZE]; /* file handle of kernel image */
+
+static IPaddr_t NfsServerIP;
+static int	NfsSrvMountPort;
+static int	NfsSrvNfsPort;
+static int	NfsOurPort;
+static int	NfsTimeoutCount;
+static int	NfsState;
+#define STATE_PRCLOOKUP_PROG_MOUNT_REQ	1
+#define STATE_PRCLOOKUP_PROG_NFS_REQ	2
+#define STATE_MOUNT_REQ			3
+#define STATE_UMOUNT_REQ		4
+#define STATE_LOOKUP_REQ		5
+#define STATE_READ_REQ			6
+#define STATE_READLINK_REQ		7
+
+static char default_filename[64];
+static char *nfs_filename;
+static char *nfs_path;
+static char nfs_path_buff[2048];
+
+static __inline__ void
+store_block (uchar * src, unsigned offset, unsigned len)
+{
+#ifdef CFG_DIRECT_FLASH_NFS
+	int i, rc = 0;
+
+	for (i=0; i<CFG_MAX_FLASH_BANKS; i++) {
+		/* start address in flash? */
+		if (load_addr + offset >= flash_info[i].start[0]) {
+			rc = 1;
+			break;
+		}
+	}
+
+	if (rc) { /* Flash is destination for this packet */
+		rc = flash_write ((uchar *)src, (ulong)(load_addr+offset), len);
+		if (rc) {
+			flash_perror (rc);
+			NetState = NETLOOP_FAIL;
+			return;
+		}
+	} else
+#endif /* CFG_DIRECT_FLASH_NFS */
+
+	{
+		(void)memcpy ((void *)(load_addr + offset), src, len);
+	}
+}
+
+static char*
+basename (char *path)
+{
+	char *fname;
+
+	fname = path + strlen(path) - 1;
+	while (fname >= path) {
+		if (*fname == '/') {
+			fname++;
+			break;
+		}
+		fname--;
+	}
+	return fname;
+}
+
+static char*
+dirname (char *path)
+{
+	char *fname;
+
+	fname = basename (path);
+	--fname;
+	*fname = '\0';
+	return path;
+}
+
+/**************************************************************************
+RPC_INIT - set up the ID counter to something fairly random
+**************************************************************************/
+static void
+rpc_init (void)
+{
+	unsigned long t;
+	t=get_ticks();
+	rpc_id = t ^ (t << 8) ^ (t << 16);
+}
+
+/**************************************************************************
+RPC_ADD_CREDENTIALS - Add RPC authentication/verifier entries
+**************************************************************************/
+static long *rpc_add_credentials (long *p)
+{
+	int hl;
+	int hostnamelen;
+	char hostname[256];
+
+	strcpy (hostname, "");
+	hostnamelen=strlen (hostname);
+
+	/* Here's the executive summary on authentication requirements of the
+	 * various NFS server implementations:	Linux accepts both AUTH_NONE
+	 * and AUTH_UNIX authentication (also accepts an empty hostname field
+	 * in the AUTH_UNIX scheme).  *BSD refuses AUTH_NONE, but accepts
+	 * AUTH_UNIX (also accepts an empty hostname field in the AUTH_UNIX
+	 * scheme).  To be safe, use AUTH_UNIX and pass the hostname if we have
+	 * it (if the BOOTP/DHCP reply didn't give one, just use an empty
+	 * hostname).  */
+
+	hl = (hostnamelen + 3) & ~3;
+
+	/* Provide an AUTH_UNIX credential.  */
+	*p++ = htonl(1);		/* AUTH_UNIX */
+	*p++ = htonl(hl+20);		/* auth length */
+	*p++ = htonl(0);		/* stamp */
+	*p++ = htonl(hostnamelen);	/* hostname string */
+	if (hostnamelen & 3) {
+		*(p + hostnamelen / 4) = 0; /* add zero padding */
+	}
+	memcpy (p, hostname, hostnamelen);
+	p += hl / 4;
+	*p++ = 0;			/* uid */
+	*p++ = 0;			/* gid */
+	*p++ = 0;			/* auxiliary gid list */
+
+	/* Provide an AUTH_NONE verifier.  */
+	*p++ = 0;			/* AUTH_NONE */
+	*p++ = 0;			/* auth length */
+
+	return p;
+}
+
+/**************************************************************************
+RPC_LOOKUP - Lookup RPC Port numbers
+**************************************************************************/
+static void
+rpc_req (int rpc_prog, int rpc_proc, uint32_t *data, int datalen)
+{
+	struct rpc_t pkt;
+	unsigned long id;
+	uint32_t *p;
+	int pktlen;
+	int sport;
+
+	id = rpc_id++;
+	pkt.u.call.id = htonl(id);
+	pkt.u.call.type = htonl(MSG_CALL);
+	pkt.u.call.rpcvers = htonl(2);	/* use RPC version 2 */
+	pkt.u.call.prog = htonl(rpc_prog);
+	pkt.u.call.vers = htonl(2);	/* portmapper is version 2 */
+	pkt.u.call.proc = htonl(rpc_proc);
+	p = (uint32_t *)&(pkt.u.call.data);
+
+	if (datalen)
+		memcpy ((char *)p, (char *)data, datalen*sizeof(uint32_t));
+
+	pktlen = (char *)p + datalen*sizeof(uint32_t) - (char *)&pkt;
+
+	memcpy ((char *)NetTxPacket+ETHER_HDR_SIZE+IP_HDR_SIZE, (char *)&pkt, pktlen);
+
+	if (rpc_prog == PROG_PORTMAP)
+		sport = SUNRPC_PORT;
+	else if (rpc_prog == PROG_MOUNT)
+		sport = NfsSrvMountPort;
+	else
+		sport = NfsSrvNfsPort;
+
+	NetSendUDPPacket (NetServerEther, NfsServerIP, sport, NfsOurPort, pktlen);
+}
+
+/**************************************************************************
+RPC_LOOKUP - Lookup RPC Port numbers
+**************************************************************************/
+static void
+rpc_lookup_req (int prog, int ver)
+{
+	uint32_t data[16];
+
+	data[0] = 0; data[1] = 0;	/* auth credential */
+	data[2] = 0; data[3] = 0;	/* auth verifier */
+	data[4] = htonl(prog);
+	data[5] = htonl(ver);
+	data[6] = htonl(17);	/* IP_UDP */
+	data[7] = 0;
+
+	rpc_req (PROG_PORTMAP, PORTMAP_GETPORT, data, 8);
+}
+
+/**************************************************************************
+NFS_MOUNT - Mount an NFS Filesystem
+**************************************************************************/
+static void
+nfs_mount_req (char *path)
+{
+	uint32_t data[1024];
+	uint32_t *p;
+	int len;
+	int pathlen;
+
+	pathlen = strlen (path);
+
+	p = &(data[0]);
+	p = (uint32_t *)rpc_add_credentials((long *)p);
+
+	*p++ = htonl(pathlen);
+	if (pathlen & 3) *(p + pathlen / 4) = 0;
+	memcpy (p, path, pathlen);
+	p += (pathlen + 3) / 4;
+
+	len = (uint32_t *)p - (uint32_t *)&(data[0]);
+
+	rpc_req (PROG_MOUNT, MOUNT_ADDENTRY, data, len);
+}
+
+/**************************************************************************
+NFS_UMOUNTALL - Unmount all our NFS Filesystems on the Server
+**************************************************************************/
+static void
+nfs_umountall_req (void)
+{
+	uint32_t data[1024];
+	uint32_t *p;
+	int len;
+
+	if ((NfsSrvMountPort == -1) || (!fs_mounted)) {
+		/* Nothing mounted, nothing to umount */
+		return;
+	}
+
+	p = &(data[0]);
+	p = (uint32_t *)rpc_add_credentials ((long *)p);
+
+	len = (uint32_t *)p - (uint32_t *)&(data[0]);
+
+	rpc_req (PROG_MOUNT, MOUNT_UMOUNTALL, data, len);
+}
+
+/***************************************************************************
+ * NFS_READLINK (AH 2003-07-14)
+ * This procedure is called when read of the first block fails -
+ * this probably happens when it's a directory or a symlink
+ * In case of successful readlink(), the dirname is manipulated,
+ * so that inside the nfs() function a recursion can be done.
+ **************************************************************************/
+static void
+nfs_readlink_req (void)
+{
+	uint32_t data[1024];
+	uint32_t *p;
+	int len;
+
+	p = &(data[0]);
+	p = (uint32_t *)rpc_add_credentials ((long *)p);
+
+	memcpy (p, filefh, NFS_FHSIZE);
+	p += (NFS_FHSIZE / 4);
+
+	len = (uint32_t *)p - (uint32_t *)&(data[0]);
+
+	rpc_req (PROG_NFS, NFS_READLINK, data, len);
+}
+
+/**************************************************************************
+NFS_LOOKUP - Lookup Pathname
+**************************************************************************/
+static void
+nfs_lookup_req (char *fname)
+{
+	uint32_t data[1024];
+	uint32_t *p;
+	int len;
+	int fnamelen;
+
+	fnamelen = strlen (fname);
+
+	p = &(data[0]);
+	p = (uint32_t *)rpc_add_credentials ((long *)p);
+
+	memcpy (p, dirfh, NFS_FHSIZE);
+	p += (NFS_FHSIZE / 4);
+	*p++ = htonl(fnamelen);
+	if (fnamelen & 3) *(p + fnamelen / 4) = 0;
+	memcpy (p, fname, fnamelen);
+	p += (fnamelen + 3) / 4;
+
+	len = (uint32_t *)p - (uint32_t *)&(data[0]);
+
+	rpc_req (PROG_NFS, NFS_LOOKUP, data, len);
+}
+
+/**************************************************************************
+NFS_READ - Read File on NFS Server
+**************************************************************************/
+static void
+nfs_read_req (int offset, int readlen)
+{
+	uint32_t data[1024];
+	uint32_t *p;
+	int len;
+
+	p = &(data[0]);
+	p = (uint32_t *)rpc_add_credentials ((long *)p);
+
+	memcpy (p, filefh, NFS_FHSIZE);
+	p += (NFS_FHSIZE / 4);
+	*p++ = htonl(offset);
+	*p++ = htonl(readlen);
+	*p++ = 0;
+
+	len = (uint32_t *)p - (uint32_t *)&(data[0]);
+
+	rpc_req (PROG_NFS, NFS_READ, data, len);
+}
+
+/**************************************************************************
+RPC request dispatcher
+**************************************************************************/
+
+static void
+NfsSend (void)
+{
+#ifdef NFS_DEBUG
+	printf ("%s\n", __FUNCTION__);
+#endif
+
+	switch (NfsState) {
+	case STATE_PRCLOOKUP_PROG_MOUNT_REQ:
+		rpc_lookup_req (PROG_MOUNT, 1);
+		break;
+	case STATE_PRCLOOKUP_PROG_NFS_REQ:
+		rpc_lookup_req (PROG_NFS, 2);
+		break;
+	case STATE_MOUNT_REQ:
+		nfs_mount_req (nfs_path);
+		break;
+	case STATE_UMOUNT_REQ:
+		nfs_umountall_req ();
+		break;
+	case STATE_LOOKUP_REQ:
+		nfs_lookup_req (nfs_filename);
+		break;
+	case STATE_READ_REQ:
+		nfs_read_req (nfs_offset, nfs_len);
+		break;
+	case STATE_READLINK_REQ:
+		nfs_readlink_req ();
+		break;
+	}
+}
+
+/**************************************************************************
+Handlers for the reply from server
+**************************************************************************/
+
+static int
+rpc_lookup_reply (int prog, uchar *pkt, unsigned len)
+{
+	struct rpc_t rpc_pkt;
+
+	memcpy ((unsigned char *)&rpc_pkt, pkt, len);
+
+#ifdef NFS_DEBUG
+	printf ("%s\n", __FUNCTION__);
+#endif
+
+	if (rpc_pkt.u.reply.rstatus  ||
+	    rpc_pkt.u.reply.verifier ||
+	    rpc_pkt.u.reply.astatus  ||
+	    rpc_pkt.u.reply.astatus) {
+	}
+
+	switch (prog) {
+	case PROG_MOUNT:
+		NfsSrvMountPort = ntohl(rpc_pkt.u.reply.data[0]);
+		break;
+	case PROG_NFS:
+		NfsSrvNfsPort = ntohl(rpc_pkt.u.reply.data[0]);
+		break;
+	}
+
+	return 0;
+}
+
+static int
+nfs_mount_reply (uchar *pkt, unsigned len)
+{
+	struct rpc_t rpc_pkt;
+
+#ifdef NFS_DEBUG
+	printf ("%s\n", __FUNCTION__);
+#endif
+
+	memcpy ((unsigned char *)&rpc_pkt, pkt, len);
+
+	if (rpc_pkt.u.reply.rstatus  ||
+	    rpc_pkt.u.reply.verifier ||
+	    rpc_pkt.u.reply.astatus  ||
+	    rpc_pkt.u.reply.data[0]) {
+		return -1;
+	}
+
+	fs_mounted = 1;
+	memcpy (dirfh, rpc_pkt.u.reply.data + 1, NFS_FHSIZE);
+
+	return 0;
+}
+
+static int
+nfs_umountall_reply (uchar *pkt, unsigned len)
+{
+	struct rpc_t rpc_pkt;
+
+#ifdef NFS_DEBUG
+	printf ("%s\n", __FUNCTION__);
+#endif
+
+	memcpy ((unsigned char *)&rpc_pkt, pkt, len);
+
+	if (rpc_pkt.u.reply.rstatus  ||
+	    rpc_pkt.u.reply.verifier ||
+	    rpc_pkt.u.reply.astatus) {
+		return -1;
+	}
+
+	fs_mounted = 0;
+	memset (dirfh, 0, sizeof(dirfh));
+
+	return 0;
+}
+
+static int
+nfs_lookup_reply (uchar *pkt, unsigned len)
+{
+	struct rpc_t rpc_pkt;
+
+#ifdef NFS_DEBUG
+	printf ("%s\n", __FUNCTION__);
+#endif
+
+	memcpy ((unsigned char *)&rpc_pkt, pkt, len);
+
+	if (rpc_pkt.u.reply.rstatus  ||
+	    rpc_pkt.u.reply.verifier ||
+	    rpc_pkt.u.reply.astatus  ||
+	    rpc_pkt.u.reply.data[0]) {
+		return -1;
+	}
+
+	memcpy (filefh, rpc_pkt.u.reply.data + 1, NFS_FHSIZE);
+
+	return 0;
+}
+
+static int
+nfs_readlink_reply (uchar *pkt, unsigned len)
+{
+	struct rpc_t rpc_pkt;
+	int rlen;
+
+#ifdef NFS_DEBUG
+	printf ("%s\n", __FUNCTION__);
+#endif
+
+	memcpy ((unsigned char *)&rpc_pkt, pkt, len);
+
+	if (rpc_pkt.u.reply.rstatus  ||
+	    rpc_pkt.u.reply.verifier ||
+	    rpc_pkt.u.reply.astatus  ||
+	    rpc_pkt.u.reply.data[0]) {
+		return -1;
+	}
+
+	rlen = ntohl (rpc_pkt.u.reply.data[1]); /* new path length */
+
+	if (*((char *)&(rpc_pkt.u.reply.data[2])) != '/') {
+		int pathlen;
+		strcat (nfs_path, "/");
+		pathlen = strlen(nfs_path);
+		memcpy (nfs_path+pathlen, (uchar *)&(rpc_pkt.u.reply.data[2]), rlen);
+		nfs_path[pathlen+rlen+1] = 0;
+	} else {
+		memcpy (nfs_path, (uchar *)&(rpc_pkt.u.reply.data[2]), rlen);
+		nfs_path[rlen] = 0;
+	}
+	return 0;
+}
+
+static int
+nfs_read_reply (uchar *pkt, unsigned len)
+{
+	struct rpc_t rpc_pkt;
+	int rlen;
+
+#ifdef NFS_DEBUG_nop
+	printf ("%s\n", __FUNCTION__);
+#endif
+
+	rlen = (uchar *)&(rpc_pkt.u.reply.data[19]) - (uchar *)&(rpc_pkt.u.reply.id);
+	memcpy ((uchar *)&rpc_pkt, pkt, rlen);
+
+	if (rpc_pkt.u.reply.rstatus  ||
+	    rpc_pkt.u.reply.verifier ||
+	    rpc_pkt.u.reply.astatus  ||
+	    rpc_pkt.u.reply.data[0]) {
+		if (rpc_pkt.u.reply.rstatus) {
+			return -9999;
+		}
+		if (rpc_pkt.u.reply.astatus) {
+			return -9999;
+		}
+		return -ntohl(rpc_pkt.u.reply.data[0]);;
+	}
+
+	if ((nfs_offset!=0) && !((nfs_offset) % (NFS_READ_SIZE/2*10*HASHES_PER_LINE))) {
+		puts ("\n\t ");
+	}
+	if (!(nfs_offset % ((NFS_READ_SIZE/2)*10))) {
+		putc ('#');
+	}
+
+	rlen = ntohl(rpc_pkt.u.reply.data[18]);
+	store_block ((uchar *)&(rpc_pkt.u.reply.data[19]), nfs_offset, rlen);
+
+	return rlen;
+}
+
+/**************************************************************************
+Interfaces of U-BOOT
+**************************************************************************/
+
+static void
+NfsHandler (uchar *pkt, unsigned dest, unsigned src, unsigned len)
+{
+	int rlen;
+
+#ifdef NFS_DEBUG
+	printf ("%s\n", __FUNCTION__);
+#endif
+
+	if (dest != NfsOurPort) return;
+
+	switch (NfsState) {
+	case STATE_PRCLOOKUP_PROG_MOUNT_REQ:
+		rpc_lookup_reply (PROG_MOUNT, pkt, len);
+		NfsState = STATE_PRCLOOKUP_PROG_NFS_REQ;
+		NfsSend ();
+		break;
+
+	case STATE_PRCLOOKUP_PROG_NFS_REQ:
+		rpc_lookup_reply (PROG_NFS, pkt, len);
+		NfsState = STATE_MOUNT_REQ;
+		NfsSend ();
+		break;
+
+	case STATE_MOUNT_REQ:
+		if (nfs_mount_reply(pkt, len)) {
+			puts ("*** ERROR: Cannot mount\n");
+			/* just to be sure... */
+			NfsState = STATE_UMOUNT_REQ;
+			NfsSend ();
+		} else {
+			NfsState = STATE_LOOKUP_REQ;
+			NfsSend ();
+		}
+		break;
+
+	case STATE_UMOUNT_REQ:
+		if (nfs_umountall_reply(pkt, len)) {
+			puts ("*** ERROR: Cannot umount\n");
+			NetState = NETLOOP_FAIL;
+		} else {
+			NetState = NETLOOP_SUCCESS;
+		}
+		break;
+
+	case STATE_LOOKUP_REQ:
+		if (nfs_lookup_reply(pkt, len)) {
+			puts ("*** ERROR: File lookup fail\n");
+			NfsState = STATE_UMOUNT_REQ;
+			NfsSend ();
+		} else {
+			NfsState = STATE_READ_REQ;
+			nfs_offset = 0;
+			nfs_len = NFS_READ_SIZE;
+			NfsSend ();
+		}
+		break;
+
+	case STATE_READLINK_REQ:
+		if (nfs_readlink_reply(pkt, len)) {
+			puts ("*** ERROR: Symlink fail\n");
+			NfsState = STATE_UMOUNT_REQ;
+			NfsSend ();
+		} else {
+#ifdef NFS_DEBUG
+			printf ("Symlink --> %s\n", nfs_path);
+#endif
+			nfs_filename = basename (nfs_path);
+			nfs_path     = dirname (nfs_path);
+
+			NfsState = STATE_MOUNT_REQ;
+			NfsSend ();
+		}
+		break;
+
+	case STATE_READ_REQ:
+		rlen = nfs_read_reply (pkt, len);
+		if (rlen > 0) {
+			nfs_offset += rlen;
+			NfsSend ();
+		}
+		else if ((rlen == -NFSERR_ISDIR)||(rlen == -NFSERR_INVAL)) {
+			/* symbolic link */
+			NfsState = STATE_READLINK_REQ;
+			NfsSend ();
+		} else {
+			puts ("\ndone\n");
+			printf ("Bytes transferred = %d (%x hex)\n",
+				nfs_offset, nfs_offset);
+			NfsState = STATE_UMOUNT_REQ;
+			NfsSend ();
+		}
+		break;
+	}
+}
+
+static void
+NfsTimeout (void)
+{
+	puts ("Timeout\n");
+	NetState = NETLOOP_FAIL;
+	return;
+}
+
+void
+NfsStart (void)
+{
+#ifdef NFS_DEBUG
+	printf ("%s\n", __FUNCTION__);
+#endif
+
+	NfsServerIP = NetServerIP;
+	nfs_path = (char *)nfs_path_buff;
+
+	if (nfs_path == NULL) {
+		NetState = NETLOOP_FAIL;
+		puts ("*** ERROR: Fail allocate memory\n");
+		return;
+	}
+
+	if (BootFile[0] == '\0') {
+		IPaddr_t OurIP = ntohl (NetOurIP);
+
+		sprintf (default_filename, "/nfsroot/%02lX%02lX%02lX%02lX.img",
+			OurIP & 0xFF,
+			(OurIP >>  8) & 0xFF,
+			(OurIP >> 16) & 0xFF,
+			(OurIP >> 24) & 0xFF	);
+		strcpy (nfs_path, default_filename);
+
+		printf ("*** Warning: no boot file name; using '%s'\n",
+			nfs_path);
+	} else {
+		char *p=BootFile;
+
+		p = strchr (p, ':');
+
+		if (p != NULL) {
+			NfsServerIP = string_to_ip (BootFile);
+			++p;
+			strcpy (nfs_path, p);
+		} else {
+			strcpy (nfs_path, BootFile);
+		}
+	}
+
+	nfs_filename = basename (nfs_path);
+	nfs_path     = dirname (nfs_path);
+
+#if defined(CONFIG_NET_MULTI)
+	printf ("Using %s device\n", eth_get_name());
+#endif
+
+	puts ("File transfer via NFS from server "); print_IPaddr (NfsServerIP);
+	puts ("; our IP address is ");		    print_IPaddr (NetOurIP);
+
+	/* Check if we need to send across this subnet */
+	if (NetOurGatewayIP && NetOurSubnetMask) {
+		IPaddr_t OurNet	    = NetOurIP	  & NetOurSubnetMask;
+		IPaddr_t ServerNet  = NetServerIP & NetOurSubnetMask;
+
+		if (OurNet != ServerNet) {
+			puts ("; sending through gateway ");
+			print_IPaddr (NetOurGatewayIP) ;
+		}
+	}
+	putc ('\n');
+
+	printf ("Filename '%s/%s'.", nfs_path, nfs_filename);
+
+	if (NetBootFileSize) {
+		printf (" Size is 0x%x Bytes = ", NetBootFileSize<<9);
+		print_size (NetBootFileSize<<9, "");
+	}
+	putc ('\n');
+
+	printf ("Load address: 0x%lx\n", load_addr);
+
+	printf ("Loading: *\b");
+
+	NetSetTimeout (NFS_TIMEOUT * CFG_HZ, NfsTimeout);
+	NetSetHandler (NfsHandler);
+
+	rpc_init ();
+	NfsTimeoutCount = 0;
+	NfsState = STATE_PRCLOOKUP_PROG_MOUNT_REQ;
+
+	/*NfsOurPort = 4096 + (get_ticks() % 3072);*/
+	/*FIX ME !!!*/
+	NfsOurPort = 1000;
+
+	/* zero out server ether in case the server ip has changed */
+	memset (NetServerEther, 0, 6);
+
+	NfsSend ();
+}
+
+#endif /* CONFIG_COMMANDS & CFG_CMD_NFS */
diff --git a/net/nfs.h b/net/nfs.h
new file mode 100644
index 0000000000..ebd4266857
--- /dev/null
+++ b/net/nfs.h
@@ -0,0 +1,74 @@
+/*
+ * (C) Masami Komiya <mkomiya@sonare.it> 2004
+ *
+ * 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, or (at
+ * your option) any later version.
+ */
+
+#ifndef __NFS_H__
+#define __NFS_H__
+
+#define SUNRPC_PORT     111
+
+#define PROG_PORTMAP    100000
+#define PROG_NFS        100003
+#define PROG_MOUNT      100005
+
+#define MSG_CALL        0
+#define MSG_REPLY       1
+
+#define PORTMAP_GETPORT 3
+
+#define MOUNT_ADDENTRY  1
+#define MOUNT_UMOUNTALL 4
+
+#define NFS_LOOKUP      4
+#define NFS_READLINK    5
+#define NFS_READ        6
+
+#define NFS_FHSIZE      32
+
+#define NFSERR_PERM     1
+#define NFSERR_NOENT    2
+#define NFSERR_ACCES    13
+#define NFSERR_ISDIR    21
+#define NFSERR_INVAL    22
+
+/* Block size used for NFS read accesses.  A RPC reply packet (including  all
+ * headers) must fit within a single Ethernet frame to avoid fragmentation.
+ * Chosen to be a power of two, as most NFS servers are optimized for this.  */
+#define NFS_READ_SIZE   1024
+
+#define NFS_MAXLINKDEPTH 16
+
+struct rpc_t {
+	union {
+		uint8_t data[2048];
+		struct {
+			uint32_t id;
+			uint32_t type;
+			uint32_t rpcvers;
+			uint32_t prog;
+			uint32_t vers;
+			uint32_t proc;
+			uint32_t data[1];
+		} call;
+		struct {
+			uint32_t id;
+			uint32_t type;
+			uint32_t rstatus;
+			uint32_t verifier;
+			uint32_t v2;
+			uint32_t astatus;
+			uint32_t data[1];
+		} reply;
+	} u;
+};
+extern void	NfsStart (void);	/* Begin NFS */
+
+
+/**********************************************************************/
+
+#endif /* __NFS_H__ */