[wplug] NFS problem

[Brandon Kuczenski]

I am running NFS on a BSD server and Linux client.  Recently (after a 
kernel oops and a hard reboot) my nfs mounting from the client ceased to 
work properly.  I can mount one volume, but when I try to mount the second 
the command hangs.  It doesn't seem to matter which one I mount first-- 
the second one always fails. If I don't interrupt the hung mount process I 
get a "can't read superblock" error; restarting portmap on the client 
fixes the problem.  But I can still only mount one volume.

Nothing has changed on the server for quite awhile.

Any ideas?

The fstab lines I use to mount are:
server:/home/vol1     /mnt/nfs/vol1  nfs   \
      rw,nfsvers=3,rsize=8192,wsize=8192,hard,intr    0       0
server:/usr/local/vol2  /mnt/nfs/vol2 nfs  \
      rw,nfsvers=3,rsize=8192,wsize=8192,hard,intr    0       0

I've tried it both with and without the 'nfsvers=3,rsize=8192,wsize=8192' 
options, but I haven't tried any other parameters.

Here is some rpc info with one volume mounted.  It all looks normal:

[server: ]$ rpcinfo -p
    program vers proto   port
     100000    2   tcp    111  portmapper
     100000    2   udp    111  portmapper
     100005    3   udp    824  mountd
     100005    3   tcp    796  mountd
     100005    1   udp    824  mountd
     100005    1   tcp    796  mountd
     100003    2   udp   2049  nfs
     100003    3   udp   2049  nfs
     100003    2   tcp   2049  nfs
     100003    3   tcp   2049  nfs
     100021    1   udp    754  nlockmgr
     100021    3   udp    754  nlockmgr
     100021    4   udp    754  nlockmgr
     100021    1   tcp    914  nlockmgr
     100021    3   tcp    914  nlockmgr
     100021    4   tcp    914  nlockmgr
     100024    1   udp    658  status
     100024    1   tcp    783  status
[server: ]$ rpcinfo -p client
    program vers proto   port
     100000    2   tcp    111  portmapper
     100000    2   udp    111  portmapper
     100024    1   udp    946  status
     100024    1   tcp    949  status
     100021    1   udp  32771  nlockmgr
     100021    3   udp  32771  nlockmgr
     100021    4   udp  32771  nlockmgr
     100021    1   tcp  36239  nlockmgr
     100021    3   tcp  36239  nlockmgr
     100021    4   tcp  36239  nlockmgr


[client: ]# rpcinfo -p
    program vers proto   port
     100000    2   tcp    111  portmapper
     100000    2   udp    111  portmapper
     100024    1   udp    946  status
     100024    1   tcp    949  status
     100021    1   udp  32771  nlockmgr
     100021    3   udp  32771  nlockmgr
     100021    4   udp  32771  nlockmgr
     100021    1   tcp  36239  nlockmgr
     100021    3   tcp  36239  nlockmgr
     100021    4   tcp  36239  nlockmgr
[client: ]# rpcinfo -p server
    program vers proto   port
     100000    2   tcp    111  portmapper
     100000    2   udp    111  portmapper
     100005    3   udp    824  mountd
     100005    3   tcp    796  mountd
     100005    1   udp    824  mountd
     100005    1   tcp    796  mountd
     100003    2   udp   2049  nfs
     100003    3   udp   2049  nfs
     100003    2   tcp   2049  nfs
     100003    3   tcp   2049  nfs
     100021    1   udp    754  nlockmgr
     100021    3   udp    754  nlockmgr
     100021    4   udp    754  nlockmgr
     100021    1   tcp    914  nlockmgr
     100021    3   tcp    914  nlockmgr
     100021    4   tcp    914  nlockmgr
     100024    1   udp    658  status
     100024    1   tcp    783  status