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. */
25 /* NOTE 4: NFSv3 support added by Guillaume GARDET, 2016-June-20.
26 * NFSv2 is still used by default. But if server does not support NFSv2, then
27 * NFSv3 is used, if available on NFS server. */
37 #define HASHES_PER_LINE 65 /* Number of "loading" hashes per line */
38 #define NFS_RETRY_COUNT 30
39 #ifndef CONFIG_NFS_TIMEOUT
40 # define NFS_TIMEOUT 2000UL
42 # define NFS_TIMEOUT CONFIG_NFS_TIMEOUT
46 #define NFS_RPC_DROP 124
48 static int fs_mounted;
49 static unsigned long rpc_id;
50 static int nfs_offset = -1;
52 static ulong nfs_timeout = NFS_TIMEOUT;
54 static char dirfh[NFS_FHSIZE]; /* NFSv2 / NFSv3 file handle of directory */
55 static char filefh[NFS3_FHSIZE]; /* NFSv2 / NFSv3 file handle */
56 static int filefh3_length; /* (variable) length of filefh when NFSv3 */
58 static enum net_loop_state nfs_download_state;
59 static struct in_addr nfs_server_ip;
60 static int nfs_server_mount_port;
61 static int nfs_server_port;
62 static int nfs_our_port;
63 static int nfs_timeout_count;
65 #define STATE_PRCLOOKUP_PROG_MOUNT_REQ 1
66 #define STATE_PRCLOOKUP_PROG_NFS_REQ 2
67 #define STATE_MOUNT_REQ 3
68 #define STATE_UMOUNT_REQ 4
69 #define STATE_LOOKUP_REQ 5
70 #define STATE_READ_REQ 6
71 #define STATE_READLINK_REQ 7
73 static char *nfs_filename;
74 static char *nfs_path;
75 static char nfs_path_buff[2048];
78 #define NFSV3_FLAG 1 << 1
79 static char supported_nfs_versions = NFSV2_FLAG | NFSV3_FLAG;
81 static inline int store_block(uchar *src, unsigned offset, unsigned len)
83 ulong newsize = offset + len;
84 #ifdef CONFIG_SYS_DIRECT_FLASH_NFS
87 for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
88 /* start address in flash? */
89 if (load_addr + offset >= flash_info[i].start[0]) {
95 if (rc) { /* Flash is destination for this packet */
96 rc = flash_write((uchar *)src, (ulong)(load_addr+offset), len);
102 #endif /* CONFIG_SYS_DIRECT_FLASH_NFS */
104 void *ptr = map_sysmem(load_addr + offset, len);
106 memcpy(ptr, src, len);
110 if (net_boot_file_size < (offset + len))
111 net_boot_file_size = newsize;
115 static char *basename(char *path)
119 fname = path + strlen(path) - 1;
120 while (fname >= path) {
130 static char *dirname(char *path)
134 fname = basename(path);
140 /**************************************************************************
141 RPC_ADD_CREDENTIALS - Add RPC authentication/verifier entries
142 **************************************************************************/
143 static uint32_t *rpc_add_credentials(uint32_t *p)
149 strcpy(hostname, "");
150 hostnamelen = strlen(hostname);
152 /* Here's the executive summary on authentication requirements of the
153 * various NFS server implementations: Linux accepts both AUTH_NONE
154 * and AUTH_UNIX authentication (also accepts an empty hostname field
155 * in the AUTH_UNIX scheme). *BSD refuses AUTH_NONE, but accepts
156 * AUTH_UNIX (also accepts an empty hostname field in the AUTH_UNIX
157 * scheme). To be safe, use AUTH_UNIX and pass the hostname if we have
158 * it (if the BOOTP/DHCP reply didn't give one, just use an empty
161 hl = (hostnamelen + 3) & ~3;
163 /* Provide an AUTH_UNIX credential. */
164 *p++ = htonl(1); /* AUTH_UNIX */
165 *p++ = htonl(hl+20); /* auth length */
166 *p++ = htonl(0); /* stamp */
167 *p++ = htonl(hostnamelen); /* hostname string */
169 *(p + hostnamelen / 4) = 0; /* add zero padding */
170 memcpy(p, hostname, hostnamelen);
174 *p++ = 0; /* auxiliary gid list */
176 /* Provide an AUTH_NONE verifier. */
177 *p++ = 0; /* AUTH_NONE */
178 *p++ = 0; /* auth length */
183 /**************************************************************************
184 RPC_LOOKUP - Lookup RPC Port numbers
185 **************************************************************************/
186 static struct rpc_t *rpc_req_prep(void)
188 return (struct rpc_t *)(net_tx_packet + net_eth_hdr_size() +
192 static void rpc_req(int rpc_prog, int rpc_proc, struct rpc_t *rpc_pkt,
200 rpc_pkt->u.call.id = htonl(id);
201 rpc_pkt->u.call.type = htonl(MSG_CALL);
202 rpc_pkt->u.call.rpcvers = htonl(2); /* use RPC version 2 */
203 rpc_pkt->u.call.prog = htonl(rpc_prog);
206 if (supported_nfs_versions & NFSV2_FLAG)
207 rpc_pkt->u.call.vers = htonl(2); /* NFS v2 */
208 else /* NFSV3_FLAG */
209 rpc_pkt->u.call.vers = htonl(3); /* NFS v3 */
214 /* portmapper is version 2 */
215 rpc_pkt->u.call.vers = htonl(2);
217 rpc_pkt->u.call.proc = htonl(rpc_proc);
219 pktlen = ((char *)&rpc_pkt->u.call.data - (char *)&rpc_pkt) +
220 datalen * sizeof(uint32_t);
222 if (rpc_prog == PROG_PORTMAP)
224 else if (rpc_prog == PROG_MOUNT)
225 sport = nfs_server_mount_port;
227 sport = nfs_server_port;
229 net_send_udp_packet(net_server_ethaddr, nfs_server_ip, sport,
230 nfs_our_port, pktlen);
233 /**************************************************************************
234 RPC_LOOKUP - Lookup RPC Port numbers
235 **************************************************************************/
236 static void rpc_lookup_req(int prog, int ver)
239 struct rpc_t *rpc_pkt = rpc_req_prep();
241 data = rpc_pkt->u.call.data;
242 data[0] = 0; data[1] = 0; /* auth credential */
243 data[2] = 0; data[3] = 0; /* auth verifier */
244 data[4] = htonl(prog);
245 data[5] = htonl(ver);
246 data[6] = htonl(17); /* IP_UDP */
248 rpc_req(PROG_PORTMAP, PORTMAP_GETPORT, rpc_pkt, 8);
251 /**************************************************************************
252 NFS_MOUNT - Mount an NFS Filesystem
253 **************************************************************************/
254 static void nfs_mount_req(char *path)
259 struct rpc_t *rpc_pkt = rpc_req_prep();
261 pathlen = strlen(path);
263 p = rpc_pkt->u.call.data;
264 p = rpc_add_credentials(p);
266 *p++ = htonl(pathlen);
268 *(p + pathlen / 4) = 0;
269 memcpy(p, path, pathlen);
270 p += (pathlen + 3) / 4;
272 len = (uint32_t *)p - (uint32_t *)&(rpc_pkt->u.call.data);
274 rpc_req(PROG_MOUNT, MOUNT_ADDENTRY, rpc_pkt, len);
277 /**************************************************************************
278 NFS_UMOUNTALL - Unmount all our NFS Filesystems on the Server
279 **************************************************************************/
280 static void nfs_umountall_req(void)
284 struct rpc_t *rpc_pkt = rpc_req_prep();
286 if ((nfs_server_mount_port == -1) || (!fs_mounted))
287 /* Nothing mounted, nothing to umount */
290 p = rpc_pkt->u.call.data;
291 p = rpc_add_credentials(p);
293 len = (uint32_t *)p - (uint32_t *)&(rpc_pkt->u.call.data);
295 rpc_req(PROG_MOUNT, MOUNT_UMOUNTALL, rpc_pkt, len);
298 /***************************************************************************
299 * NFS_READLINK (AH 2003-07-14)
300 * This procedure is called when read of the first block fails -
301 * this probably happens when it's a directory or a symlink
302 * In case of successful readlink(), the dirname is manipulated,
303 * so that inside the nfs() function a recursion can be done.
304 **************************************************************************/
305 static void nfs_readlink_req(void)
309 struct rpc_t *rpc_pkt = rpc_req_prep();
311 p = rpc_pkt->u.call.data;
312 p = rpc_add_credentials(p);
314 if (supported_nfs_versions & NFSV2_FLAG) {
315 memcpy(p, filefh, NFS_FHSIZE);
316 p += (NFS_FHSIZE / 4);
317 } else { /* NFSV3_FLAG */
318 *p++ = htonl(filefh3_length);
319 memcpy(p, filefh, filefh3_length);
320 p += (filefh3_length / 4);
323 len = (uint32_t *)p - (uint32_t *)&(rpc_pkt->u.call.data);
325 rpc_req(PROG_NFS, NFS_READLINK, rpc_pkt, len);
328 /**************************************************************************
329 NFS_LOOKUP - Lookup Pathname
330 **************************************************************************/
331 static void nfs_lookup_req(char *fname)
336 struct rpc_t *rpc_pkt = rpc_req_prep();
338 fnamelen = strlen(fname);
340 p = rpc_pkt->u.call.data;
341 p = rpc_add_credentials(p);
343 if (supported_nfs_versions & NFSV2_FLAG) {
344 memcpy(p, dirfh, NFS_FHSIZE);
345 p += (NFS_FHSIZE / 4);
346 *p++ = htonl(fnamelen);
348 *(p + fnamelen / 4) = 0;
349 memcpy(p, fname, fnamelen);
350 p += (fnamelen + 3) / 4;
352 len = (uint32_t *)p - (uint32_t *)&(rpc_pkt->u.call.data);
354 rpc_req(PROG_NFS, NFS_LOOKUP, rpc_pkt, len);
355 } else { /* NFSV3_FLAG */
356 *p++ = htonl(NFS_FHSIZE); /* Dir handle length */
357 memcpy(p, dirfh, NFS_FHSIZE);
358 p += (NFS_FHSIZE / 4);
359 *p++ = htonl(fnamelen);
361 *(p + fnamelen / 4) = 0;
362 memcpy(p, fname, fnamelen);
363 p += (fnamelen + 3) / 4;
365 len = (uint32_t *)p - (uint32_t *)&(rpc_pkt->u.call.data);
367 rpc_req(PROG_NFS, NFS3PROC_LOOKUP, rpc_pkt, len);
371 /**************************************************************************
372 NFS_READ - Read File on NFS Server
373 **************************************************************************/
374 static void nfs_read_req(int offset, int readlen)
378 struct rpc_t *rpc_pkt = rpc_req_prep();
380 p = rpc_pkt->u.call.data;
381 p = rpc_add_credentials(p);
383 if (supported_nfs_versions & NFSV2_FLAG) {
384 memcpy(p, filefh, NFS_FHSIZE);
385 p += (NFS_FHSIZE / 4);
386 *p++ = htonl(offset);
387 *p++ = htonl(readlen);
389 } else { /* NFSV3_FLAG */
390 *p++ = htonl(filefh3_length);
391 memcpy(p, filefh, filefh3_length);
392 p += (filefh3_length / 4);
393 *p++ = htonl(0); /* offset is 64-bit long, so fill with 0 */
394 *p++ = htonl(offset);
395 *p++ = htonl(readlen);
399 len = (uint32_t *)p - (uint32_t *)&(rpc_pkt->u.call.data);
401 rpc_req(PROG_NFS, NFS_READ, rpc_pkt, len);
404 /**************************************************************************
405 RPC request dispatcher
406 **************************************************************************/
407 static void nfs_send(void)
409 debug("%s\n", __func__);
412 case STATE_PRCLOOKUP_PROG_MOUNT_REQ:
413 if (supported_nfs_versions & NFSV2_FLAG)
414 rpc_lookup_req(PROG_MOUNT, 1);
415 else /* NFSV3_FLAG */
416 rpc_lookup_req(PROG_MOUNT, 3);
418 case STATE_PRCLOOKUP_PROG_NFS_REQ:
419 if (supported_nfs_versions & NFSV2_FLAG)
420 rpc_lookup_req(PROG_NFS, 2);
421 else /* NFSV3_FLAG */
422 rpc_lookup_req(PROG_NFS, 3);
424 case STATE_MOUNT_REQ:
425 nfs_mount_req(nfs_path);
427 case STATE_UMOUNT_REQ:
430 case STATE_LOOKUP_REQ:
431 nfs_lookup_req(nfs_filename);
434 nfs_read_req(nfs_offset, nfs_len);
436 case STATE_READLINK_REQ:
442 /**************************************************************************
443 Handlers for the reply from server
444 **************************************************************************/
446 static int rpc_lookup_reply(int prog, uchar *pkt, unsigned len)
448 struct rpc_t rpc_pkt;
450 memcpy(&rpc_pkt.u.data[0], pkt, len);
452 debug("%s\n", __func__);
454 if (ntohl(rpc_pkt.u.reply.id) > rpc_id)
456 else if (ntohl(rpc_pkt.u.reply.id) < rpc_id)
457 return -NFS_RPC_DROP;
459 if (rpc_pkt.u.reply.rstatus ||
460 rpc_pkt.u.reply.verifier ||
461 rpc_pkt.u.reply.astatus)
466 nfs_server_mount_port = ntohl(rpc_pkt.u.reply.data[0]);
469 nfs_server_port = ntohl(rpc_pkt.u.reply.data[0]);
476 static int nfs_mount_reply(uchar *pkt, unsigned len)
478 struct rpc_t rpc_pkt;
480 debug("%s\n", __func__);
482 memcpy(&rpc_pkt.u.data[0], pkt, len);
484 if (ntohl(rpc_pkt.u.reply.id) > rpc_id)
486 else if (ntohl(rpc_pkt.u.reply.id) < rpc_id)
487 return -NFS_RPC_DROP;
489 if (rpc_pkt.u.reply.rstatus ||
490 rpc_pkt.u.reply.verifier ||
491 rpc_pkt.u.reply.astatus ||
492 rpc_pkt.u.reply.data[0])
496 /* NFSv2 and NFSv3 use same structure */
497 memcpy(dirfh, rpc_pkt.u.reply.data + 1, NFS_FHSIZE);
502 static int nfs_umountall_reply(uchar *pkt, unsigned len)
504 struct rpc_t rpc_pkt;
506 debug("%s\n", __func__);
508 memcpy(&rpc_pkt.u.data[0], pkt, len);
510 if (ntohl(rpc_pkt.u.reply.id) > rpc_id)
512 else if (ntohl(rpc_pkt.u.reply.id) < rpc_id)
513 return -NFS_RPC_DROP;
515 if (rpc_pkt.u.reply.rstatus ||
516 rpc_pkt.u.reply.verifier ||
517 rpc_pkt.u.reply.astatus)
521 memset(dirfh, 0, sizeof(dirfh));
526 static int nfs_lookup_reply(uchar *pkt, unsigned len)
528 struct rpc_t rpc_pkt;
530 debug("%s\n", __func__);
532 memcpy(&rpc_pkt.u.data[0], pkt, len);
534 if (ntohl(rpc_pkt.u.reply.id) > rpc_id)
536 else if (ntohl(rpc_pkt.u.reply.id) < rpc_id)
537 return -NFS_RPC_DROP;
539 if (rpc_pkt.u.reply.rstatus ||
540 rpc_pkt.u.reply.verifier ||
541 rpc_pkt.u.reply.astatus ||
542 rpc_pkt.u.reply.data[0]) {
543 switch (ntohl(rpc_pkt.u.reply.astatus)) {
544 case NFS_RPC_SUCCESS: /* Not an error */
546 case NFS_RPC_PROG_MISMATCH:
547 /* Remote can't support NFS version */
548 switch (ntohl(rpc_pkt.u.reply.data[0])) {
549 /* Minimal supported NFS version */
551 debug("*** Waring: NFS version not supported: Requested: V%d, accepted: min V%d - max V%d\n",
552 (supported_nfs_versions & NFSV2_FLAG) ?
554 ntohl(rpc_pkt.u.reply.data[0]),
555 ntohl(rpc_pkt.u.reply.data[1]));
556 debug("Will retry with NFSv3\n");
557 /* Clear NFSV2_FLAG from supported versions */
558 supported_nfs_versions &= ~NFSV2_FLAG;
559 return -NFS_RPC_PROG_MISMATCH;
562 puts("*** ERROR: NFS version not supported");
563 debug(": Requested: V%d, accepted: min V%d - max V%d\n",
564 (supported_nfs_versions & NFSV2_FLAG) ?
566 ntohl(rpc_pkt.u.reply.data[0]),
567 ntohl(rpc_pkt.u.reply.data[1]));
571 case NFS_RPC_PROG_UNAVAIL:
572 case NFS_RPC_PROC_UNAVAIL:
573 case NFS_RPC_GARBAGE_ARGS:
574 case NFS_RPC_SYSTEM_ERR:
575 default: /* Unknown error on 'accept state' flag */
576 debug("*** ERROR: accept state error (%d)\n",
577 ntohl(rpc_pkt.u.reply.astatus));
583 if (supported_nfs_versions & NFSV2_FLAG) {
584 memcpy(filefh, rpc_pkt.u.reply.data + 1, NFS_FHSIZE);
585 } else { /* NFSV3_FLAG */
586 filefh3_length = ntohl(rpc_pkt.u.reply.data[1]);
587 if (filefh3_length > NFS3_FHSIZE)
588 filefh3_length = NFS3_FHSIZE;
589 memcpy(filefh, rpc_pkt.u.reply.data + 2, filefh3_length);
595 static int nfs3_get_attributes_offset(uint32_t *data)
597 if (ntohl(data[1]) != 0) {
598 /* 'attributes_follow' flag is TRUE,
599 * so we have attributes on 21 dwords */
600 /* Skip unused values :
603 nlink; 32 bits value,
610 fileid; 64 bits value,
611 atime; 64 bits value,
612 mtime; 64 bits value,
613 ctime; 64 bits value,
617 /* 'attributes_follow' flag is FALSE,
618 * so we don't have any attributes */
623 static int nfs_readlink_reply(uchar *pkt, unsigned len)
625 struct rpc_t rpc_pkt;
627 int nfsv3_data_offset = 0;
629 debug("%s\n", __func__);
631 memcpy((unsigned char *)&rpc_pkt, pkt, len);
633 if (ntohl(rpc_pkt.u.reply.id) > rpc_id)
635 else if (ntohl(rpc_pkt.u.reply.id) < rpc_id)
636 return -NFS_RPC_DROP;
638 if (rpc_pkt.u.reply.rstatus ||
639 rpc_pkt.u.reply.verifier ||
640 rpc_pkt.u.reply.astatus ||
641 rpc_pkt.u.reply.data[0])
644 if (!(supported_nfs_versions & NFSV2_FLAG)) { /* NFSV3_FLAG */
646 nfs3_get_attributes_offset(rpc_pkt.u.reply.data);
649 /* new path length */
650 rlen = ntohl(rpc_pkt.u.reply.data[1 + nfsv3_data_offset]);
652 if (*((char *)&(rpc_pkt.u.reply.data[2 + nfsv3_data_offset])) != '/') {
655 strcat(nfs_path, "/");
656 pathlen = strlen(nfs_path);
657 memcpy(nfs_path + pathlen,
658 (uchar *)&(rpc_pkt.u.reply.data[2 + nfsv3_data_offset]),
660 nfs_path[pathlen + rlen] = 0;
663 (uchar *)&(rpc_pkt.u.reply.data[2 + nfsv3_data_offset]),
670 static int nfs_read_reply(uchar *pkt, unsigned len)
672 struct rpc_t rpc_pkt;
676 debug("%s\n", __func__);
678 memcpy(&rpc_pkt.u.data[0], pkt, sizeof(rpc_pkt.u.reply));
680 if (ntohl(rpc_pkt.u.reply.id) > rpc_id)
682 else if (ntohl(rpc_pkt.u.reply.id) < rpc_id)
683 return -NFS_RPC_DROP;
685 if (rpc_pkt.u.reply.rstatus ||
686 rpc_pkt.u.reply.verifier ||
687 rpc_pkt.u.reply.astatus ||
688 rpc_pkt.u.reply.data[0]) {
689 if (rpc_pkt.u.reply.rstatus)
691 if (rpc_pkt.u.reply.astatus)
693 return -ntohl(rpc_pkt.u.reply.data[0]);
696 if ((nfs_offset != 0) && !((nfs_offset) %
697 (NFS_READ_SIZE / 2 * 10 * HASHES_PER_LINE)))
699 if (!(nfs_offset % ((NFS_READ_SIZE / 2) * 10)))
702 if (supported_nfs_versions & NFSV2_FLAG) {
703 rlen = ntohl(rpc_pkt.u.reply.data[18]);
704 data_ptr = (uchar *)&(rpc_pkt.u.reply.data[19]);
705 } else { /* NFSV3_FLAG */
706 int nfsv3_data_offset =
707 nfs3_get_attributes_offset(rpc_pkt.u.reply.data);
710 rlen = ntohl(rpc_pkt.u.reply.data[1 + nfsv3_data_offset]);
711 /* Skip unused values :
713 data_size: 32 bits value,
716 &(rpc_pkt.u.reply.data[4 + nfsv3_data_offset]);
719 if (store_block(data_ptr, nfs_offset, rlen))
725 /**************************************************************************
727 **************************************************************************/
728 static void nfs_timeout_handler(void)
730 if (++nfs_timeout_count > NFS_RETRY_COUNT) {
731 puts("\nRetry count exceeded; starting again\n");
735 net_set_timeout_handler(nfs_timeout +
736 NFS_TIMEOUT * nfs_timeout_count,
737 nfs_timeout_handler);
742 static void nfs_handler(uchar *pkt, unsigned dest, struct in_addr sip,
743 unsigned src, unsigned len)
748 debug("%s\n", __func__);
750 if (dest != nfs_our_port)
754 case STATE_PRCLOOKUP_PROG_MOUNT_REQ:
755 if (rpc_lookup_reply(PROG_MOUNT, pkt, len) == -NFS_RPC_DROP)
757 nfs_state = STATE_PRCLOOKUP_PROG_NFS_REQ;
761 case STATE_PRCLOOKUP_PROG_NFS_REQ:
762 if (rpc_lookup_reply(PROG_NFS, pkt, len) == -NFS_RPC_DROP)
764 nfs_state = STATE_MOUNT_REQ;
768 case STATE_MOUNT_REQ:
769 reply = nfs_mount_reply(pkt, len);
770 if (reply == -NFS_RPC_DROP) {
772 } else if (reply == -NFS_RPC_ERR) {
773 puts("*** ERROR: Cannot mount\n");
774 /* just to be sure... */
775 nfs_state = STATE_UMOUNT_REQ;
778 nfs_state = STATE_LOOKUP_REQ;
783 case STATE_UMOUNT_REQ:
784 reply = nfs_umountall_reply(pkt, len);
785 if (reply == -NFS_RPC_DROP) {
787 } else if (reply == -NFS_RPC_ERR) {
788 debug("*** ERROR: Cannot umount\n");
789 net_set_state(NETLOOP_FAIL);
792 net_set_state(nfs_download_state);
796 case STATE_LOOKUP_REQ:
797 reply = nfs_lookup_reply(pkt, len);
798 if (reply == -NFS_RPC_DROP) {
800 } else if (reply == -NFS_RPC_ERR) {
801 puts("*** ERROR: File lookup fail\n");
802 nfs_state = STATE_UMOUNT_REQ;
804 } else if (reply == -NFS_RPC_PROG_MISMATCH &&
805 supported_nfs_versions != 0) {
807 nfs_state = STATE_UMOUNT_REQ;
809 /* And retry with another supported version */
810 nfs_state = STATE_PRCLOOKUP_PROG_MOUNT_REQ;
813 nfs_state = STATE_READ_REQ;
815 nfs_len = NFS_READ_SIZE;
820 case STATE_READLINK_REQ:
821 reply = nfs_readlink_reply(pkt, len);
822 if (reply == -NFS_RPC_DROP) {
824 } else if (reply == -NFS_RPC_ERR) {
825 puts("*** ERROR: Symlink fail\n");
826 nfs_state = STATE_UMOUNT_REQ;
829 debug("Symlink --> %s\n", nfs_path);
830 nfs_filename = basename(nfs_path);
831 nfs_path = dirname(nfs_path);
833 nfs_state = STATE_MOUNT_REQ;
839 rlen = nfs_read_reply(pkt, len);
840 net_set_timeout_handler(nfs_timeout, nfs_timeout_handler);
844 } else if ((rlen == -NFSERR_ISDIR) || (rlen == -NFSERR_INVAL)) {
846 nfs_state = STATE_READLINK_REQ;
850 nfs_download_state = NETLOOP_SUCCESS;
852 debug("NFS READ error (%d)\n", rlen);
853 nfs_state = STATE_UMOUNT_REQ;
863 debug("%s\n", __func__);
864 nfs_download_state = NETLOOP_FAIL;
866 nfs_server_ip = net_server_ip;
867 nfs_path = (char *)nfs_path_buff;
869 if (nfs_path == NULL) {
870 net_set_state(NETLOOP_FAIL);
871 debug("*** ERROR: Fail allocate memory\n");
875 if (net_boot_file_name[0] == '\0') {
876 sprintf(nfs_path, "/nfsroot/%02X%02X%02X%02X.img",
877 net_ip.s_addr & 0xFF,
878 (net_ip.s_addr >> 8) & 0xFF,
879 (net_ip.s_addr >> 16) & 0xFF,
880 (net_ip.s_addr >> 24) & 0xFF);
882 debug("*** Warning: no boot file name; using '%s'\n",
885 char *p = net_boot_file_name;
890 nfs_server_ip = string_to_ip(net_boot_file_name);
894 strcpy(nfs_path, net_boot_file_name);
898 nfs_filename = basename(nfs_path);
899 nfs_path = dirname(nfs_path);
901 debug("Using %s device\n", eth_get_name());
903 debug("File transfer via NFS from server %pI4; our IP address is %pI4",
904 &nfs_server_ip, &net_ip);
906 /* Check if we need to send across this subnet */
907 if (net_gateway.s_addr && net_netmask.s_addr) {
908 struct in_addr our_net;
909 struct in_addr server_net;
911 our_net.s_addr = net_ip.s_addr & net_netmask.s_addr;
912 server_net.s_addr = net_server_ip.s_addr & net_netmask.s_addr;
913 if (our_net.s_addr != server_net.s_addr)
914 debug("; sending through gateway %pI4",
917 debug("\nFilename '%s/%s'.", nfs_path, nfs_filename);
919 if (net_boot_file_expected_size_in_blocks) {
920 debug(" Size is 0x%x Bytes = ",
921 net_boot_file_expected_size_in_blocks << 9);
922 print_size(net_boot_file_expected_size_in_blocks << 9, "");
924 debug("\nLoad address: 0x%lx\nLoading: *\b", load_addr);
926 net_set_timeout_handler(nfs_timeout, nfs_timeout_handler);
927 net_set_udp_handler(nfs_handler);
929 nfs_timeout_count = 0;
930 nfs_state = STATE_PRCLOOKUP_PROG_MOUNT_REQ;
932 /*nfs_our_port = 4096 + (get_ticks() % 3072);*/
936 /* zero out server ether in case the server ip has changed */
937 memset(net_server_ethaddr, 0, 6);