Re: mountd: Possible bug in next_mnt()

[Richard Weinberger <richard@nod.at>]

----- Ursprüngliche Mail -----
>> I'm still trying to reproduce problem... I have
>> 
>> /etc/nfs.conf: rootdir=/export
>> 
>> /etc/exports:
>> /home *(rw,sec=sys:krb5:krb5i:krb5p)
>> /tmp *(rw,fsid=666,all_squash)
>> / *(rw,fsid=root,all_squash)
>> 
>> I'm not seeing the problem... Where does the crossmount come in?
> 
> Chris reported the problem to me while he was testing my re-export/crossmount
> patches.
> I can try reproducing without re-exporting later.

Finally I found some cycles to reproduce without my re-exporting setup.

1. /etc/exports contains:
/       *(rw,crossmnt,no_subtree_check,fsid=root)

2. /etc/nfs.conf contains:

[exports]
 rootdir=/nfs_srv
 
3. Mounts:

/root/fs1.ext4 on /nfs_srv type ext4 (rw,relatime)
/root/fs2.ext4 on /nfs_srv/fs2 type ext4 (rw,relatime)

4. On the client:

# ls /nfs_client/fs2
ls: cannot open directory '/nfs_client/fs2': Stale file handle

I'll send a proper patch ASAP.
next_mnt() has to deal with "/" too.

Thanks,
//richard