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-rw-r--r--net/nfs.c74
1 files changed, 53 insertions, 21 deletions
diff --git a/net/nfs.c b/net/nfs.c
index 7f2393f..381b75f 100644
--- a/net/nfs.c
+++ b/net/nfs.c
@@ -37,10 +37,14 @@
# define NFS_TIMEOUT CONFIG_NFS_TIMEOUT
#endif
+#define NFS_RPC_ERR 1
+#define NFS_RPC_DROP 124
+
static int fs_mounted;
static unsigned long rpc_id;
static int nfs_offset = -1;
static int nfs_len;
+static ulong nfs_timeout = NFS_TIMEOUT;
static char dirfh[NFS_FHSIZE]; /* file handle of directory */
static char filefh[NFS_FHSIZE]; /* file handle of kernel image */
@@ -399,8 +403,10 @@ rpc_lookup_reply(int prog, uchar *pkt, unsigned len)
debug("%s\n", __func__);
- if (ntohl(rpc_pkt.u.reply.id) != rpc_id)
- return -1;
+ if (ntohl(rpc_pkt.u.reply.id) > rpc_id)
+ return -NFS_RPC_ERR;
+ else if (ntohl(rpc_pkt.u.reply.id) < rpc_id)
+ return -NFS_RPC_DROP;
if (rpc_pkt.u.reply.rstatus ||
rpc_pkt.u.reply.verifier ||
@@ -428,8 +434,10 @@ nfs_mount_reply(uchar *pkt, unsigned len)
memcpy((unsigned char *)&rpc_pkt, pkt, len);
- if (ntohl(rpc_pkt.u.reply.id) != rpc_id)
- return -1;
+ if (ntohl(rpc_pkt.u.reply.id) > rpc_id)
+ return -NFS_RPC_ERR;
+ else if (ntohl(rpc_pkt.u.reply.id) < rpc_id)
+ return -NFS_RPC_DROP;
if (rpc_pkt.u.reply.rstatus ||
rpc_pkt.u.reply.verifier ||
@@ -452,8 +460,10 @@ nfs_umountall_reply(uchar *pkt, unsigned len)
memcpy((unsigned char *)&rpc_pkt, pkt, len);
- if (ntohl(rpc_pkt.u.reply.id) != rpc_id)
- return -1;
+ if (ntohl(rpc_pkt.u.reply.id) > rpc_id)
+ return -NFS_RPC_ERR;
+ else if (ntohl(rpc_pkt.u.reply.id) < rpc_id)
+ return -NFS_RPC_DROP;
if (rpc_pkt.u.reply.rstatus ||
rpc_pkt.u.reply.verifier ||
@@ -475,8 +485,10 @@ nfs_lookup_reply(uchar *pkt, unsigned len)
memcpy((unsigned char *)&rpc_pkt, pkt, len);
- if (ntohl(rpc_pkt.u.reply.id) != rpc_id)
- return -1;
+ if (ntohl(rpc_pkt.u.reply.id) > rpc_id)
+ return -NFS_RPC_ERR;
+ else if (ntohl(rpc_pkt.u.reply.id) < rpc_id)
+ return -NFS_RPC_DROP;
if (rpc_pkt.u.reply.rstatus ||
rpc_pkt.u.reply.verifier ||
@@ -499,8 +511,10 @@ nfs_readlink_reply(uchar *pkt, unsigned len)
memcpy((unsigned char *)&rpc_pkt, pkt, len);
- if (ntohl(rpc_pkt.u.reply.id) != rpc_id)
- return -1;
+ if (ntohl(rpc_pkt.u.reply.id) > rpc_id)
+ return -NFS_RPC_ERR;
+ else if (ntohl(rpc_pkt.u.reply.id) < rpc_id)
+ return -NFS_RPC_DROP;
if (rpc_pkt.u.reply.rstatus ||
rpc_pkt.u.reply.verifier ||
@@ -534,8 +548,10 @@ nfs_read_reply(uchar *pkt, unsigned len)
memcpy((uchar *)&rpc_pkt, pkt, sizeof(rpc_pkt.u.reply));
- if (ntohl(rpc_pkt.u.reply.id) != rpc_id)
- return -1;
+ if (ntohl(rpc_pkt.u.reply.id) > rpc_id)
+ return -NFS_RPC_ERR;
+ else if (ntohl(rpc_pkt.u.reply.id) < rpc_id)
+ return -NFS_RPC_DROP;
if (rpc_pkt.u.reply.rstatus ||
rpc_pkt.u.reply.verifier ||
@@ -574,7 +590,8 @@ NfsTimeout(void)
NetStartAgain();
} else {
puts("T ");
- NetSetTimeout(NFS_TIMEOUT, NfsTimeout);
+ NetSetTimeout(nfs_timeout + NFS_TIMEOUT * NfsTimeoutCount,
+ NfsTimeout);
NfsSend();
}
}
@@ -583,6 +600,7 @@ static void
NfsHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src, unsigned len)
{
int rlen;
+ int reply;
debug("%s\n", __func__);
@@ -591,19 +609,24 @@ NfsHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src, unsigned len)
switch (NfsState) {
case STATE_PRCLOOKUP_PROG_MOUNT_REQ:
- rpc_lookup_reply(PROG_MOUNT, pkt, len);
+ if (rpc_lookup_reply(PROG_MOUNT, pkt, len) == -NFS_RPC_DROP)
+ break;
NfsState = STATE_PRCLOOKUP_PROG_NFS_REQ;
NfsSend();
break;
case STATE_PRCLOOKUP_PROG_NFS_REQ:
- rpc_lookup_reply(PROG_NFS, pkt, len);
+ if (rpc_lookup_reply(PROG_NFS, pkt, len) == -NFS_RPC_DROP)
+ break;
NfsState = STATE_MOUNT_REQ;
NfsSend();
break;
case STATE_MOUNT_REQ:
- if (nfs_mount_reply(pkt, len)) {
+ reply = nfs_mount_reply(pkt, len);
+ if (reply == -NFS_RPC_DROP)
+ break;
+ else if (reply == -NFS_RPC_ERR) {
puts("*** ERROR: Cannot mount\n");
/* just to be sure... */
NfsState = STATE_UMOUNT_REQ;
@@ -615,7 +638,10 @@ NfsHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src, unsigned len)
break;
case STATE_UMOUNT_REQ:
- if (nfs_umountall_reply(pkt, len)) {
+ reply = nfs_umountall_reply(pkt, len);
+ if (reply == -NFS_RPC_DROP)
+ break;
+ else if (reply == -NFS_RPC_ERR) {
puts("*** ERROR: Cannot umount\n");
net_set_state(NETLOOP_FAIL);
} else {
@@ -625,7 +651,10 @@ NfsHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src, unsigned len)
break;
case STATE_LOOKUP_REQ:
- if (nfs_lookup_reply(pkt, len)) {
+ reply = nfs_lookup_reply(pkt, len);
+ if (reply == -NFS_RPC_DROP)
+ break;
+ else if (reply == -NFS_RPC_ERR) {
puts("*** ERROR: File lookup fail\n");
NfsState = STATE_UMOUNT_REQ;
NfsSend();
@@ -638,7 +667,10 @@ NfsHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src, unsigned len)
break;
case STATE_READLINK_REQ:
- if (nfs_readlink_reply(pkt, len)) {
+ reply = nfs_readlink_reply(pkt, len);
+ if (reply == -NFS_RPC_DROP)
+ break;
+ else if (reply == -NFS_RPC_ERR) {
puts("*** ERROR: Symlink fail\n");
NfsState = STATE_UMOUNT_REQ;
NfsSend();
@@ -654,7 +686,7 @@ NfsHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src, unsigned len)
case STATE_READ_REQ:
rlen = nfs_read_reply(pkt, len);
- NetSetTimeout(NFS_TIMEOUT, NfsTimeout);
+ NetSetTimeout(nfs_timeout, NfsTimeout);
if (rlen > 0) {
nfs_offset += rlen;
NfsSend();
@@ -738,7 +770,7 @@ NfsStart(void)
printf("\nLoad address: 0x%lx\n"
"Loading: *\b", load_addr);
- NetSetTimeout(NFS_TIMEOUT, NfsTimeout);
+ NetSetTimeout(nfs_timeout, NfsTimeout);
net_set_udp_handler(NfsHandler);
NfsTimeoutCount = 0;
generated by cgit v1.1 at 2024-12-26 06:42:35 +0000