zfs discuss - Jun 2008 - getting inodeno for zfs from vnode in vfs kernel layer

i need to get inodeno on ZFS and i am not able to find how to find it in
kernel at vfs layer.

i have vnode pointer and i am doing VTOZ to get znode but printing z_id
from znode pointer

gives me deadbeef(unitialized) , can somebody point me how to get that?

i looked at zfs_getattr code and it does similar thing  which i am doing
but its able to get me 

inode no in getattribute structure(node id), that makes me thinking
there is something more happening when i 

call vop_getattr on zfs rather than just calling zfs_getattr.















******************Legal Disclaimer***************************
"This communication may contain confidential and privileged material 
for the sole use of the intended recipient.  Any unauthorized review, 
use or distribution by others is strictly prohibited.  If you have 
received the message in error, please advise the sender by reply 
email and delete the message. Thank you."
****************************************************************
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://mail.opensolaris.org/pipermail/zfs-discuss/attachments/20080618/08347fb1/attachment.html>

Shriram Agarwal wrote:
> i need to get inodeno on ZFS and i am not able to find how to find it in 
> kernel at vfs layer.
> 
> i have vnode pointer and i am doing VTOZ to get znode but printing z_id 
> from znode pointer
> 
> gives me deadbeef(unitialized) , can somebody point me how to get that?
> 
> i looked at zfs_getattr code and it does similar thing  which i am doing 
> but its able to get me
> 
> inode no in getattribute structure(node id), that makes me thinking 
> there is something more happening when i
> 
> call vop_getattr on zfs rather than just calling zfs_getattr.
> 
Are you sure you have a valid vnode?  How did you find the vnode?

What do you need the inode number for?

  -Mark

i have valid vnode , got after create and it has valid fields such as
type,zfsvfsp etc. and i do get znode pointer by doing VTOZ.
i need inode for my application .
 
 
This message posted from opensolaris.org

shri wrote:
> i have valid vnode , got after create and it has valid fields such as
type,zfsvfsp etc. and i do get znode pointer by doing VTOZ.
> i need inode for my application .
Why does your application need an inode ?  What it it doing with it ? 
What are you trying to do in your application ?

I''m usually very suspicious of things other than the filesystem itself 
believing it needs the filesystems inode.  The reason I have this 
suspicion is because of my familiarity with the cachefs code which does 
this and as a result is very broken.

-- 
Darren J Moffat

If you really need the inode number, you should use the semi-public interface to
retrieve it and call VOP_GETATTR.  This is what the rest of the kernel does when
it needs attributes of a vnode.

See for example

http://cvs.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/uts/common/syscall/stat.c
 
 
This message posted from opensolaris.org