iomap: Add a page_prepare callback

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Move the page_done callback into a separate iomap_page_ops structure and
add a page_prepare calback to be called before the next page is written
to.  In gfs2, we'll want to start a transaction in page_prepare and end
it in page_done.  Other filesystems that implement data journaling will
require the same kind of mechanism.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>

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Andreas Gruenbacher 2019-04-30 08:45:34 -07:00 • committed by Darrick J. Wong

parent 7a77dad7e3

commit df0db3ecdb

3 changed files with 53 additions and 20 deletions

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include/linux/iomap.h

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