u-boot for Mediatek MT623x baseband processor
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uboot-mt623x/net/nfs.c

755 lines
18 KiB

/*
* 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 HASHES_PER_LINE 65 /* Number of "loading" hashes per line */
#define NFS_RETRY_COUNT 30
#define NFS_TIMEOUT 2000UL
static int fs_mounted = 0;
static unsigned long rpc_id = 0;
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 int NfsDownloadState;
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__ int
store_block (uchar * src, unsigned offset, unsigned len)
{
ulong newsize = offset + len;
#ifdef CONFIG_SYS_DIRECT_FLASH_NFS
int i, rc = 0;
for (i=0; i<CONFIG_SYS_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);
return -1;
}
} else
#endif /* CONFIG_SYS_DIRECT_FLASH_NFS */
{
(void)memcpy ((void *)(load_addr + offset), src, len);
}
if (NetBootFileXferSize < (offset+len))
NetBootFileXferSize = newsize;
return 0;
}
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_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 + NetEthHdrSize() + 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)
{
debug("%s\n", __func__);
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);
debug("%s\n", __func__);
if (ntohl(rpc_pkt.u.reply.id) != rpc_id)
return -1;
if (rpc_pkt.u.reply.rstatus ||
rpc_pkt.u.reply.verifier ||
rpc_pkt.u.reply.astatus) {
return -1;
}
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;
debug("%s\n", __func__);
memcpy ((unsigned char *)&rpc_pkt, pkt, len);
if (ntohl(rpc_pkt.u.reply.id) != rpc_id)
return -1;
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;
debug("%s\n", __func__);
memcpy ((unsigned char *)&rpc_pkt, pkt, len);
if (ntohl(rpc_pkt.u.reply.id) != rpc_id)
return -1;
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;
debug("%s\n", __func__);
memcpy ((unsigned char *)&rpc_pkt, pkt, len);
if (ntohl(rpc_pkt.u.reply.id) != rpc_id)
return -1;
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;
debug("%s\n", __func__);
memcpy ((unsigned char *)&rpc_pkt, pkt, len);
if (ntohl(rpc_pkt.u.reply.id) != rpc_id)
return -1;
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] = 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;
debug("%s\n", __func__);
memcpy ((uchar *)&rpc_pkt, pkt, sizeof(rpc_pkt.u.reply));
if (ntohl(rpc_pkt.u.reply.id) != rpc_id)
return -1;
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]);
if ( store_block ((uchar *)pkt+sizeof(rpc_pkt.u.reply), nfs_offset, rlen) )
return -9999;
return rlen;
}
/**************************************************************************
Interfaces of U-BOOT
**************************************************************************/
static void
NfsTimeout (void)
{
if ( ++NfsTimeoutCount > NFS_RETRY_COUNT ) {
puts ("\nRetry count exceeded; starting again\n");
NetStartAgain ();
} else {
puts("T ");
NetSetTimeout (NFS_TIMEOUT, NfsTimeout);
NfsSend ();
}
}
static void
NfsHandler (uchar *pkt, unsigned dest, unsigned src, unsigned len)
{
int rlen;
debug("%s\n", __func__);
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 {
puts ("\ndone\n");
NetState = NfsDownloadState;
}
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 {
debug("Symlink --> %s\n", nfs_path);
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);
NetSetTimeout (NFS_TIMEOUT, NfsTimeout);
if (rlen > 0) {
nfs_offset += rlen;
NfsSend ();
}
else if ((rlen == -NFSERR_ISDIR)||(rlen == -NFSERR_INVAL)) {
/* symbolic link */
NfsState = STATE_READLINK_REQ;
NfsSend ();
} else {
if ( ! rlen ) NfsDownloadState = NETLOOP_SUCCESS;
NfsState = STATE_UMOUNT_REQ;
NfsSend ();
}
break;
}
}
void
NfsStart (void)
{
debug("%s\n", __func__);
NfsDownloadState = NETLOOP_FAIL;
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') {
sprintf (default_filename, "/nfsroot/%02lX%02lX%02lX%02lX.img",
NetOurIP & 0xFF,
(NetOurIP >> 8) & 0xFF,
(NetOurIP >> 16) & 0xFF,
(NetOurIP >> 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
printf("File transfer via NFS from server %pI4"
"; our IP address is %pI4", &NfsServerIP, &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)
printf("; sending through gateway %pI4", &NetOurGatewayIP);
}
printf ("\nFilename '%s/%s'.", nfs_path, nfs_filename);
if (NetBootFileSize) {
printf (" Size is 0x%x Bytes = ", NetBootFileSize<<9);
print_size (NetBootFileSize<<9, "");
}
printf ("\nLoad address: 0x%lx\n"
"Loading: *\b", load_addr);
NetSetTimeout (NFS_TIMEOUT, NfsTimeout);
NetSetHandler (NfsHandler);
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 ();
}