zfs discuss - Nov 2008 - zfs znode changes getting lost

In place of padding in zfs znode i added a new field. stored an integer value
and am able to see saved information.

but after reboot it is not there.  If i was able to access before reboot so it
must be in memory. I think i need to  save it to disk.
how does one force zfs znode to disk.
right now i dont do anything special for it. Just made an ioctl, accessed znode
and made changes.

example in zfs_ioctl

case add_new:
                zp = VTOZ(vp);
		zp->z_phys->new_field = 2;
               return(0);
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I suspect ZFS is unaware that anything has changed in the
z_phys so it never gets written out. You probably need
to create a dmu transaction and call dmu_buf_will_dirty(zp->z_dbuf, tx);

Neil.

On 11/26/08 03:36, shelly wrote:
> In place of padding in zfs znode i added a new field. stored an integer
value and am able to see saved information.
> 
> but after reboot it is not there.  If i was able to access before reboot so
it must be in memory. I think i need to  save it to disk.
> how does one force zfs znode to disk.
> right now i dont do anything special for it. Just made an ioctl, accessed
znode and made changes.
> 
> example in zfs_ioctl
> 
> case add_new:
>                 zp = VTOZ(vp);
> 		zp->z_phys->new_field = 2;
>                return(0);

thanx a lot perrin it really helped a lot.
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