On Tue, Oct 31 2006, Jan Engelhardt wrote:
>
> >> This allows the splice() and tee() syscalls to be used with JFS.
> >
> >Gosh, that was easy. Why couldn't I do that? :-)
>
> You could add it to all the other filesystems that lack it. (Cautionary
> question: Does that work at an instant like it did with jfs?)
>
> Seems like only ext[234] gfs2 reiserfs and xfs have splice_read
> currently.
If the file system uses the generic page cache functions for reading and
writing, it should be able to use the generic splice read/write
functions as well. If it doesn't, then more work is likely involved. In
short, check the .read/.write and .aio_read/.aio_write parts of the
file_operations[] structure. jfs uses the generic handlers, hence splice
support should just be the two-liner posted.
--
Jens Axboe
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