2 * NFS support driver - based on etherboot and U-BOOT's tftp.c
4 * Masami Komiya <mkomiya@sonare.it> 2004
8 /* NOTE: the NFS code is heavily inspired by the NetBSD netboot code (read:
9 * large portions are copied verbatim) as distributed in OSKit 0.97. A few
10 * changes were necessary to adapt the code to Etherboot and to fix several
11 * inconsistencies. Also the RPC message preparation is done "by hand" to
12 * avoid adding netsprintf() which I find hard to understand and use. */
14 /* NOTE 2: Etherboot does not care about things beyond the kernel image, so
15 * it loads the kernel image off the boot server (ARP_SERVER) and does not
16 * access the client root disk (root-path in dhcpd.conf), which would use
17 * ARP_ROOTSERVER. The root disk is something the operating system we are
18 * about to load needs to use. This is different from the OSKit 0.97 logic. */
20 /* NOTE 3: Symlink handling introduced by Anselm M Hoffmeister, 2003-July-14
21 * If a symlink is encountered, it is followed as far as possible (recursion
22 * possible, maximum 16 steps). There is no clearing of ".."'s inside the
23 * path, so please DON'T DO THAT. thx. */
32 #define HASHES_PER_LINE 65 /* Number of "loading" hashes per line */
33 #define NFS_RETRY_COUNT 30
34 #define NFS_TIMEOUT 2000UL
36 static int fs_mounted = 0;
37 static unsigned long rpc_id = 0;
38 static int nfs_offset = -1;
41 static char dirfh[NFS_FHSIZE]; /* file handle of directory */
42 static char filefh[NFS_FHSIZE]; /* file handle of kernel image */
44 static int NfsDownloadState;
45 static IPaddr_t NfsServerIP;
46 static int NfsSrvMountPort;
47 static int NfsSrvNfsPort;
48 static int NfsOurPort;
49 static int NfsTimeoutCount;
51 #define STATE_PRCLOOKUP_PROG_MOUNT_REQ 1
52 #define STATE_PRCLOOKUP_PROG_NFS_REQ 2
53 #define STATE_MOUNT_REQ 3
54 #define STATE_UMOUNT_REQ 4
55 #define STATE_LOOKUP_REQ 5
56 #define STATE_READ_REQ 6
57 #define STATE_READLINK_REQ 7
59 static char default_filename[64];
60 static char *nfs_filename;
61 static char *nfs_path;
62 static char nfs_path_buff[2048];
65 store_block (uchar * src, unsigned offset, unsigned len)
67 ulong newsize = offset + len;
68 #ifdef CONFIG_SYS_DIRECT_FLASH_NFS
71 for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; i++) {
72 /* start address in flash? */
73 if (load_addr + offset >= flash_info[i].start[0]) {
79 if (rc) { /* Flash is destination for this packet */
80 rc = flash_write ((uchar *)src, (ulong)(load_addr+offset), len);
86 #endif /* CONFIG_SYS_DIRECT_FLASH_NFS */
88 (void)memcpy ((void *)(load_addr + offset), src, len);
91 if (NetBootFileXferSize < (offset+len))
92 NetBootFileXferSize = newsize;
101 fname = path + strlen(path) - 1;
102 while (fname >= path) {
117 fname = basename (path);
123 /**************************************************************************
124 RPC_ADD_CREDENTIALS - Add RPC authentication/verifier entries
125 **************************************************************************/
126 static long *rpc_add_credentials (long *p)
132 strcpy (hostname, "");
133 hostnamelen=strlen (hostname);
135 /* Here's the executive summary on authentication requirements of the
136 * various NFS server implementations: Linux accepts both AUTH_NONE
137 * and AUTH_UNIX authentication (also accepts an empty hostname field
138 * in the AUTH_UNIX scheme). *BSD refuses AUTH_NONE, but accepts
139 * AUTH_UNIX (also accepts an empty hostname field in the AUTH_UNIX
140 * scheme). To be safe, use AUTH_UNIX and pass the hostname if we have
141 * it (if the BOOTP/DHCP reply didn't give one, just use an empty
144 hl = (hostnamelen + 3) & ~3;
146 /* Provide an AUTH_UNIX credential. */
147 *p++ = htonl(1); /* AUTH_UNIX */
148 *p++ = htonl(hl+20); /* auth length */
149 *p++ = htonl(0); /* stamp */
150 *p++ = htonl(hostnamelen); /* hostname string */
151 if (hostnamelen & 3) {
152 *(p + hostnamelen / 4) = 0; /* add zero padding */
154 memcpy (p, hostname, hostnamelen);
158 *p++ = 0; /* auxiliary gid list */
160 /* Provide an AUTH_NONE verifier. */
161 *p++ = 0; /* AUTH_NONE */
162 *p++ = 0; /* auth length */
167 /**************************************************************************
168 RPC_LOOKUP - Lookup RPC Port numbers
169 **************************************************************************/
171 rpc_req (int rpc_prog, int rpc_proc, uint32_t *data, int datalen)
180 pkt.u.call.id = htonl(id);
181 pkt.u.call.type = htonl(MSG_CALL);
182 pkt.u.call.rpcvers = htonl(2); /* use RPC version 2 */
183 pkt.u.call.prog = htonl(rpc_prog);
184 pkt.u.call.vers = htonl(2); /* portmapper is version 2 */
185 pkt.u.call.proc = htonl(rpc_proc);
186 p = (uint32_t *)&(pkt.u.call.data);
189 memcpy ((char *)p, (char *)data, datalen*sizeof(uint32_t));
191 pktlen = (char *)p + datalen*sizeof(uint32_t) - (char *)&pkt;
193 memcpy ((char *)NetTxPacket + NetEthHdrSize() + IP_HDR_SIZE, (char *)&pkt, pktlen);
195 if (rpc_prog == PROG_PORTMAP)
197 else if (rpc_prog == PROG_MOUNT)
198 sport = NfsSrvMountPort;
200 sport = NfsSrvNfsPort;
202 NetSendUDPPacket (NetServerEther, NfsServerIP, sport, NfsOurPort, pktlen);
205 /**************************************************************************
206 RPC_LOOKUP - Lookup RPC Port numbers
207 **************************************************************************/
209 rpc_lookup_req (int prog, int ver)
213 data[0] = 0; data[1] = 0; /* auth credential */
214 data[2] = 0; data[3] = 0; /* auth verifier */
215 data[4] = htonl(prog);
216 data[5] = htonl(ver);
217 data[6] = htonl(17); /* IP_UDP */
220 rpc_req (PROG_PORTMAP, PORTMAP_GETPORT, data, 8);
223 /**************************************************************************
224 NFS_MOUNT - Mount an NFS Filesystem
225 **************************************************************************/
227 nfs_mount_req (char *path)
234 pathlen = strlen (path);
237 p = (uint32_t *)rpc_add_credentials((long *)p);
239 *p++ = htonl(pathlen);
240 if (pathlen & 3) *(p + pathlen / 4) = 0;
241 memcpy (p, path, pathlen);
242 p += (pathlen + 3) / 4;
244 len = (uint32_t *)p - (uint32_t *)&(data[0]);
246 rpc_req (PROG_MOUNT, MOUNT_ADDENTRY, data, len);
249 /**************************************************************************
250 NFS_UMOUNTALL - Unmount all our NFS Filesystems on the Server
251 **************************************************************************/
253 nfs_umountall_req (void)
259 if ((NfsSrvMountPort == -1) || (!fs_mounted)) {
260 /* Nothing mounted, nothing to umount */
265 p = (uint32_t *)rpc_add_credentials ((long *)p);
267 len = (uint32_t *)p - (uint32_t *)&(data[0]);
269 rpc_req (PROG_MOUNT, MOUNT_UMOUNTALL, data, len);
272 /***************************************************************************
273 * NFS_READLINK (AH 2003-07-14)
274 * This procedure is called when read of the first block fails -
275 * this probably happens when it's a directory or a symlink
276 * In case of successful readlink(), the dirname is manipulated,
277 * so that inside the nfs() function a recursion can be done.
278 **************************************************************************/
280 nfs_readlink_req (void)
287 p = (uint32_t *)rpc_add_credentials ((long *)p);
289 memcpy (p, filefh, NFS_FHSIZE);
290 p += (NFS_FHSIZE / 4);
292 len = (uint32_t *)p - (uint32_t *)&(data[0]);
294 rpc_req (PROG_NFS, NFS_READLINK, data, len);
297 /**************************************************************************
298 NFS_LOOKUP - Lookup Pathname
299 **************************************************************************/
301 nfs_lookup_req (char *fname)
308 fnamelen = strlen (fname);
311 p = (uint32_t *)rpc_add_credentials ((long *)p);
313 memcpy (p, dirfh, NFS_FHSIZE);
314 p += (NFS_FHSIZE / 4);
315 *p++ = htonl(fnamelen);
316 if (fnamelen & 3) *(p + fnamelen / 4) = 0;
317 memcpy (p, fname, fnamelen);
318 p += (fnamelen + 3) / 4;
320 len = (uint32_t *)p - (uint32_t *)&(data[0]);
322 rpc_req (PROG_NFS, NFS_LOOKUP, data, len);
325 /**************************************************************************
326 NFS_READ - Read File on NFS Server
327 **************************************************************************/
329 nfs_read_req (int offset, int readlen)
336 p = (uint32_t *)rpc_add_credentials ((long *)p);
338 memcpy (p, filefh, NFS_FHSIZE);
339 p += (NFS_FHSIZE / 4);
340 *p++ = htonl(offset);
341 *p++ = htonl(readlen);
344 len = (uint32_t *)p - (uint32_t *)&(data[0]);
346 rpc_req (PROG_NFS, NFS_READ, data, len);
349 /**************************************************************************
350 RPC request dispatcher
351 **************************************************************************/
356 debug("%s\n", __func__);
359 case STATE_PRCLOOKUP_PROG_MOUNT_REQ:
360 rpc_lookup_req (PROG_MOUNT, 1);
362 case STATE_PRCLOOKUP_PROG_NFS_REQ:
363 rpc_lookup_req (PROG_NFS, 2);
365 case STATE_MOUNT_REQ:
366 nfs_mount_req (nfs_path);
368 case STATE_UMOUNT_REQ:
369 nfs_umountall_req ();
371 case STATE_LOOKUP_REQ:
372 nfs_lookup_req (nfs_filename);
375 nfs_read_req (nfs_offset, nfs_len);
377 case STATE_READLINK_REQ:
383 /**************************************************************************
384 Handlers for the reply from server
385 **************************************************************************/
388 rpc_lookup_reply (int prog, uchar *pkt, unsigned len)
390 struct rpc_t rpc_pkt;
392 memcpy ((unsigned char *)&rpc_pkt, pkt, len);
394 debug("%s\n", __func__);
396 if (ntohl(rpc_pkt.u.reply.id) != rpc_id)
399 if (rpc_pkt.u.reply.rstatus ||
400 rpc_pkt.u.reply.verifier ||
401 rpc_pkt.u.reply.astatus) {
407 NfsSrvMountPort = ntohl(rpc_pkt.u.reply.data[0]);
410 NfsSrvNfsPort = ntohl(rpc_pkt.u.reply.data[0]);
418 nfs_mount_reply (uchar *pkt, unsigned len)
420 struct rpc_t rpc_pkt;
422 debug("%s\n", __func__);
424 memcpy ((unsigned char *)&rpc_pkt, pkt, len);
426 if (ntohl(rpc_pkt.u.reply.id) != rpc_id)
429 if (rpc_pkt.u.reply.rstatus ||
430 rpc_pkt.u.reply.verifier ||
431 rpc_pkt.u.reply.astatus ||
432 rpc_pkt.u.reply.data[0]) {
437 memcpy (dirfh, rpc_pkt.u.reply.data + 1, NFS_FHSIZE);
443 nfs_umountall_reply (uchar *pkt, unsigned len)
445 struct rpc_t rpc_pkt;
447 debug("%s\n", __func__);
449 memcpy ((unsigned char *)&rpc_pkt, pkt, len);
451 if (ntohl(rpc_pkt.u.reply.id) != rpc_id)
454 if (rpc_pkt.u.reply.rstatus ||
455 rpc_pkt.u.reply.verifier ||
456 rpc_pkt.u.reply.astatus) {
461 memset (dirfh, 0, sizeof(dirfh));
467 nfs_lookup_reply (uchar *pkt, unsigned len)
469 struct rpc_t rpc_pkt;
471 debug("%s\n", __func__);
473 memcpy ((unsigned char *)&rpc_pkt, pkt, len);
475 if (ntohl(rpc_pkt.u.reply.id) != rpc_id)
478 if (rpc_pkt.u.reply.rstatus ||
479 rpc_pkt.u.reply.verifier ||
480 rpc_pkt.u.reply.astatus ||
481 rpc_pkt.u.reply.data[0]) {
485 memcpy (filefh, rpc_pkt.u.reply.data + 1, NFS_FHSIZE);
491 nfs_readlink_reply (uchar *pkt, unsigned len)
493 struct rpc_t rpc_pkt;
496 debug("%s\n", __func__);
498 memcpy ((unsigned char *)&rpc_pkt, pkt, len);
500 if (ntohl(rpc_pkt.u.reply.id) != rpc_id)
503 if (rpc_pkt.u.reply.rstatus ||
504 rpc_pkt.u.reply.verifier ||
505 rpc_pkt.u.reply.astatus ||
506 rpc_pkt.u.reply.data[0]) {
510 rlen = ntohl (rpc_pkt.u.reply.data[1]); /* new path length */
512 if (*((char *)&(rpc_pkt.u.reply.data[2])) != '/') {
514 strcat (nfs_path, "/");
515 pathlen = strlen(nfs_path);
516 memcpy (nfs_path+pathlen, (uchar *)&(rpc_pkt.u.reply.data[2]), rlen);
517 nfs_path[pathlen + rlen] = 0;
519 memcpy (nfs_path, (uchar *)&(rpc_pkt.u.reply.data[2]), rlen);
526 nfs_read_reply (uchar *pkt, unsigned len)
528 struct rpc_t rpc_pkt;
531 debug("%s\n", __func__);
533 memcpy ((uchar *)&rpc_pkt, pkt, sizeof(rpc_pkt.u.reply));
535 if (ntohl(rpc_pkt.u.reply.id) != rpc_id)
538 if (rpc_pkt.u.reply.rstatus ||
539 rpc_pkt.u.reply.verifier ||
540 rpc_pkt.u.reply.astatus ||
541 rpc_pkt.u.reply.data[0]) {
542 if (rpc_pkt.u.reply.rstatus) {
545 if (rpc_pkt.u.reply.astatus) {
548 return -ntohl(rpc_pkt.u.reply.data[0]);;
551 if ((nfs_offset!=0) && !((nfs_offset) % (NFS_READ_SIZE/2*10*HASHES_PER_LINE))) {
554 if (!(nfs_offset % ((NFS_READ_SIZE/2)*10))) {
558 rlen = ntohl(rpc_pkt.u.reply.data[18]);
559 if ( store_block ((uchar *)pkt+sizeof(rpc_pkt.u.reply), nfs_offset, rlen) )
565 /**************************************************************************
567 **************************************************************************/
572 if ( ++NfsTimeoutCount > NFS_RETRY_COUNT ) {
573 puts ("\nRetry count exceeded; starting again\n");
577 NetSetTimeout (NFS_TIMEOUT, NfsTimeout);
583 NfsHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src, unsigned len)
587 debug("%s\n", __func__);
589 if (dest != NfsOurPort) return;
592 case STATE_PRCLOOKUP_PROG_MOUNT_REQ:
593 rpc_lookup_reply (PROG_MOUNT, pkt, len);
594 NfsState = STATE_PRCLOOKUP_PROG_NFS_REQ;
598 case STATE_PRCLOOKUP_PROG_NFS_REQ:
599 rpc_lookup_reply (PROG_NFS, pkt, len);
600 NfsState = STATE_MOUNT_REQ;
604 case STATE_MOUNT_REQ:
605 if (nfs_mount_reply(pkt, len)) {
606 puts ("*** ERROR: Cannot mount\n");
607 /* just to be sure... */
608 NfsState = STATE_UMOUNT_REQ;
611 NfsState = STATE_LOOKUP_REQ;
616 case STATE_UMOUNT_REQ:
617 if (nfs_umountall_reply(pkt, len)) {
618 puts ("*** ERROR: Cannot umount\n");
619 NetState = NETLOOP_FAIL;
622 NetState = NfsDownloadState;
626 case STATE_LOOKUP_REQ:
627 if (nfs_lookup_reply(pkt, len)) {
628 puts ("*** ERROR: File lookup fail\n");
629 NfsState = STATE_UMOUNT_REQ;
632 NfsState = STATE_READ_REQ;
634 nfs_len = NFS_READ_SIZE;
639 case STATE_READLINK_REQ:
640 if (nfs_readlink_reply(pkt, len)) {
641 puts ("*** ERROR: Symlink fail\n");
642 NfsState = STATE_UMOUNT_REQ;
645 debug("Symlink --> %s\n", nfs_path);
646 nfs_filename = basename (nfs_path);
647 nfs_path = dirname (nfs_path);
649 NfsState = STATE_MOUNT_REQ;
655 rlen = nfs_read_reply (pkt, len);
656 NetSetTimeout (NFS_TIMEOUT, NfsTimeout);
661 else if ((rlen == -NFSERR_ISDIR)||(rlen == -NFSERR_INVAL)) {
663 NfsState = STATE_READLINK_REQ;
666 if ( ! rlen ) NfsDownloadState = NETLOOP_SUCCESS;
667 NfsState = STATE_UMOUNT_REQ;
678 debug("%s\n", __func__);
679 NfsDownloadState = NETLOOP_FAIL;
681 NfsServerIP = NetServerIP;
682 nfs_path = (char *)nfs_path_buff;
684 if (nfs_path == NULL) {
685 NetState = NETLOOP_FAIL;
686 puts ("*** ERROR: Fail allocate memory\n");
690 if (BootFile[0] == '\0') {
691 sprintf(default_filename, "/nfsroot/%02X%02X%02X%02X.img",
693 (NetOurIP >> 8) & 0xFF,
694 (NetOurIP >> 16) & 0xFF,
695 (NetOurIP >> 24) & 0xFF );
696 strcpy (nfs_path, default_filename);
698 printf ("*** Warning: no boot file name; using '%s'\n",
706 NfsServerIP = string_to_ip (BootFile);
708 strcpy (nfs_path, p);
710 strcpy (nfs_path, BootFile);
714 nfs_filename = basename (nfs_path);
715 nfs_path = dirname (nfs_path);
717 printf ("Using %s device\n", eth_get_name());
719 printf("File transfer via NFS from server %pI4"
720 "; our IP address is %pI4", &NfsServerIP, &NetOurIP);
722 /* Check if we need to send across this subnet */
723 if (NetOurGatewayIP && NetOurSubnetMask) {
724 IPaddr_t OurNet = NetOurIP & NetOurSubnetMask;
725 IPaddr_t ServerNet = NetServerIP & NetOurSubnetMask;
727 if (OurNet != ServerNet)
728 printf("; sending through gateway %pI4", &NetOurGatewayIP);
730 printf ("\nFilename '%s/%s'.", nfs_path, nfs_filename);
732 if (NetBootFileSize) {
733 printf (" Size is 0x%x Bytes = ", NetBootFileSize<<9);
734 print_size (NetBootFileSize<<9, "");
736 printf ("\nLoad address: 0x%lx\n"
737 "Loading: *\b", load_addr);
739 NetSetTimeout (NFS_TIMEOUT, NfsTimeout);
740 NetSetHandler (NfsHandler);
743 NfsState = STATE_PRCLOOKUP_PROG_MOUNT_REQ;
745 /*NfsOurPort = 4096 + (get_ticks() % 3072);*/
749 /* zero out server ether in case the server ip has changed */
750 memset (NetServerEther, 0, 6);