[pnfs] Layoutreturn Implementation

[Iyer, Rahul]

Hi,
Currently, free_layout() is being called from only one functioon:
nfs4_clear_inode(). nfs4_clear_inode() is the .clear_inode pointer of
super_operations. The .clear_inode pointer is called by clear_inode().
This is called mainly to remove the in memory inode reference. 
 
The function that I spoke about, wwhich makes the LAYOUTRETURN rpc is
pnfs_return_layout(). This function is, however called nowhere. All that
needs to be done on the client is to call pnfs_return_layout() in
nfs4_clear_inode().
So, I presume it's fairly simple. However, I had a question:
nfs4_proc_pnfs_layoutreturn() makes a call to rpc_call_sync(). Should
LAYOUTRETURN be a synchronous RPC? Is it better asynchronous? Do we
care?
 
Thanks
Rahul
 
 
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