[pnfs] CVS: nfsv4

[Rahul Iyer NetApp]

CVSROOT:	/cvs
Module name:	nfsv4
Changes by:	iyer at citi.umich.edu	2007/01/30 16:24:58

Modified files:
	cvs/pnfs/fs/nfs: nfs4filelayout.c 

Log message:
In virtual_update_layout, the roc_iomode field of the layout is set to the
iomode of the layout if the return_on_close flag is set in the LAYOUTGET
response. If this flag is not set, then roc_iomode remains unnasigned causing
the client to arbitrarily return the layout on close (based on the random value
in the unassigned roc_iomode field). Changing the kmalloc in layout allocation
to kzalloc to fix this and catch other such bugs.