Messages in this thread | | | Date | Tue, 31 Oct 2006 09:46:04 +0100 | From | Jens Axboe <> | Subject | Re: [PATCH] jfs: Add splice support |
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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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