Re: low level access path for xfs operation

[Christoph Hellwig <hch@xxxxxxxxxxxxx>]

On Fri, Mar 21, 2003 at 12:40:47PM +0900, Soon-Son Kwon wrote:
> Hi xfs folks:
> Could anyone please let me know the following
> xfs internal operation details?
> 
> I would like to know if there is any operation
> that bypasses submit_bio() when accessing the 
> lower level block devices.

No, there is no such operation.

> I want to add some function whenever the filesystem
> tries to modify any block and concluded that submit_bio()
> seems to be the lowest entry point for such operations.

You might want to rewrite a block remapper like dm or md
instead of modifying core core..