From: Andreas Gruenbacher Subject: Re: [PATCH 6/6] iomap: add a page_done callback Date: Wed, 6 Jun 2018 13:37:22 +0200 Message-ID: References: <20180606104033.4947-1-hch@lst.de> <20180606104033.4947-7-hch@lst.de> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Cc: linux-xfs@vger.kernel.org, linux-fsdevel , Dan Williams , cluster-devel , linux-ext4 To: Christoph Hellwig Return-path: In-Reply-To: <20180606104033.4947-7-hch@lst.de> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: cluster-devel-bounces@redhat.com Errors-To: cluster-devel-bounces@redhat.com List-Id: linux-ext4.vger.kernel.org On 6 June 2018 at 12:40, Christoph Hellwig wrote: > This will be used by gfs2 to attach data to transactions for the journaled > data mode. But the concept is generic enough that we might be able to > use it for other purposes like encryption/integrity post-processing in the > future. > > Based on a patch from Andreas Gruenbacher. > > Signed-off-by: Christoph Hellwig > --- > fs/iomap.c | 3 +++ > include/linux/iomap.h | 8 ++++++++ > 2 files changed, 11 insertions(+) > > diff --git a/fs/iomap.c b/fs/iomap.c > index f2a491b98b7c..a7ecdd5ddd17 100644 > --- a/fs/iomap.c > +++ b/fs/iomap.c > @@ -201,6 +201,9 @@ iomap_write_end(struct inode *inode, loff_t pos, unsigned len, > copied, page, NULL); > } > > + if (iomap->page_done) > + iomap->page_done(inode, pos, copied, page, iomap); > + > if (ret < len) > iomap_write_failed(inode, pos, len); > return ret; > diff --git a/include/linux/iomap.h b/include/linux/iomap.h > index 69ef622f650e..474e2255ac6e 100644 > --- a/include/linux/iomap.h > +++ b/include/linux/iomap.h > @@ -58,6 +58,14 @@ struct iomap { > struct dax_device *dax_dev; > void *inline_data; > }; > + > + /* > + * Called when finished processing a page in the mapping returned in > + * thus iomap. At least for now this is only supported in the buffered "thus" -> "this" > + * write path. > + */ > + void (*page_done)(struct inode *inode, loff_t pos, unsigned copied, > + struct page *page, struct iomap *iomap); > }; > > /* > -- > 2.14.2 > Andreas