root-nfs hang and error

root-nfs hang and error

[George Gensure]

I've got a problem with a diskless install on an Indy.

When trying to mount an nfs to install to, I end up with about a 5 minute
hang (afterwards, though, all file transfer is seamless).  When rebooting
to boot from that nfs root I get an rpc error from the Indy and it refuses
to mount the root.  (obviously it panics).  The kernel is 2.4.16 and has
nfs v2 and v3 installed, as well as root nfs support.  Anyone have any
suggestions for getting this root to mount correctly?

-George
werkt@csh.rit.edu

root-nfs hang and error

[George Gensure]

I've got a problem with a diskless install on an Indy.

When trying to mount an nfs to install to, I end up with about a 5 minute
hang (afterwards, though, all file transfer is seamless).  When rebooting
to boot from that nfs root I get an rpc error from the Indy and it refuses
to mount the root.  (obviously it panics).  The kernel is 2.4.16 and has
nfs v2 and v3 installed, as well as root nfs support.  Anyone have any
suggestions for getting this root to mount correctly?

-George
werkt@csh.rit.edu

Re: root-nfs hang and error

[Atsushi Nemoto]

>>>>> On Mon, 2 Sep 2002 16:43:55 -0400 (EDT), George Gensure <werkt@csh.rit.edu> said:
werkt> When trying to mount an nfs to install to, I end up with about
werkt> a 5 minute hang (afterwards, though, all file transfer is
werkt> seamless).

It seems the mount is waiting for lockd.  On diskless install,
dbootstrap try to mount nfs partition without "nolock" option.  For
workaround, you can do "Execute a Shell" and type

 # mount -o nolock server:/path /target

instead of "Mount a Previously-Initialized Partition" on diskless
install.

Isn't this a bug of dbootstrap ?  Here is a patch.

diff -u boot-floppies.org/utilities/dbootstrap/partition_config.c boot-floppies/utilities/dbootstrap/partition_config.c
--- boot-floppies.org/utilities/dbootstrap/partition_config.c	Mon Sep  2 15:33:34 2002
+++ boot-floppies/utilities/dbootstrap/partition_config.c	Mon Sep  2 19:34:02 2002
@@ -862,6 +862,13 @@
     if(strcmp(type,"msdos")==0 && !is_filesystem_supported("vfat"))
        type="vfat";
     INFOMSG("Mounting %s partition %s on %s", type, partition->name, real_mount_point);
+#ifdef NFSROOT
+    if (!strncmp(type, "nfs", 4))
+      snprintf(prtbuf, sizeof(prtbuf),
+	       "mount -t nfs -o nolock,rsize=8192,wsize=8192 %s %s",
+	       partition->name, real_mount_point);
+    else
+#endif
     snprintf(prtbuf, sizeof(prtbuf), "mount -t %s %s %s", type, partition->name, real_mount_point);
     status = execlog(prtbuf, LOG_INFO);
   }
--- ---

---
Atsushi Nemoto

Re: root-nfs hang and error

[George Gensure]

>
>
> # mount -o nolock server:/path /target
>
>  
>
gotcha.  That solves the install hang, but the bigger problem is this 
panic at boot, when all of my portmap calls return 128 (lockd, nfsd, and 
mountd) on the client.  I have no idea why this kernel is able to mount 
nfs partitions in the install, but not at boot time.

-George
werkt@csh.rit.edu

Re: root-nfs hang and error

[Atsushi Nemoto]

>>>>> On Tue, 03 Sep 2002 17:16:08 -0400, George Gensure <werkt@csh.rit.edu> said:
werkt> I have no idea why this kernel is able to mount nfs partitions
werkt> in the install, but not at boot time.

On install, rootfs is ramdisk and you will be prompted network
parameters by the installer.  On diskless boot, kernel ip pnp will be
used to configure network.  So "ip=" and "nfsroot=" options may be
required on diskless boot.  But I do not know how to specify these
options on Indy boot loader.

---
Atsushi Nemoto

Re: root-nfs hang and error

[George Gensure]

>
>
>So "ip=" and "nfsroot=" options may be
>required on diskless boot.
>
I'm actually good for that, I'm using nfsroot=<server ip>:<path> and the 
errors that come back correspond to the right host.  I know the ramdisk 
is used on the install, but I'm wondering if your nolock solution 
corresponds to the problem with the kernel mounting the nfsroot (i.e. it 
doesn't use it).  BTW, the root mounted flawlessly onto target, thanks 
for the nolock option.

-George