Re: Mount version older than kernel: 4 vs. 6

[Frank Steiner <fsteiner-mail@bio.ifi.lmu.de>]

Olaf Kirch wrote:
> On Wed, Aug 04, 2004 at 02:50:09PM +0200, Frank Steiner wrote:
> 
>>Just a stupid question: why does the nfsmount.h from the kernel source
>>define NFS_MOUNT_VERSION 6? Shouldn't this number match the latest nfs
>>version, i.e., 4? I've never heard of nfs v6 yet :-)
>>Or is the meaning of NFS_MOUNT_VERSION different?
> 
> 
> That's the version of the NFS kernel mount struct, and is
> absolutely unrelated to the NFS version (except that both
> grow monotonically over time).

I see. But then it looks like a bug to me that the code in the inode.c
is comparing the "NFS version" (4, in data->version) against the
"NFS kernel mount struct" (6, in NFS_MOUNT_VERSION). That doesn't
make sense, does it?

I added this to inode.c
         if (data->version != NFS_MOUNT_VERSION) {
                 printk("nfs warning: mount version %s than kernel\n",
                         data->version < NFS_MOUNT_VERSION ? "older" : "newer");
+                printk("data version: %d\n",data->version);
+                printk("NFS_MOUNT_VERSION: %d\n",NFS_MOUNT_VERSION);


and got this result:
Aug  4 14:33:50 riemann kernel: nfs warning: mmmount version older than kernel
Aug  4 14:33:50 riemann kernel: data version: 4
Aug  4 14:33:50 riemann kernel: NFS_MOUNT_VERSION: 6


cu,
Frank


-- 
Dipl.-Inform. Frank Steiner   Web:  http://www.bio.ifi.lmu.de/~steiner/
Lehrstuhl f. Bioinformatik    Mail: http://www.bio.ifi.lmu.de/~steiner/m/
LMU, Amalienstr. 17           Phone: +49 89 2180-4049
80333 Muenchen, Germany       Fax:   +49 89 2180-99-4049
* Rekursion kann man erst verstehen, wenn man Rekursion verstanden hat. *


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