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From: "Darrick J. Wong" <djwong@kernel.org>
To: Christoph Hellwig <hch@lst.de>
Cc: Dan Williams <dan.j.williams@intel.com>,
	Matthew Wilcox <willy@infradead.org>,
	Andreas Gruenbacher <agruenba@redhat.com>,
	Shiyang Ruan <ruansy.fnst@fujitsu.com>,
	linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org,
	linux-btrfs@vger.kernel.org, nvdimm@lists.linux.dev,
	cluster-devel@redhat.com
Subject: Re: [PATCH 16/30] iomap: switch iomap_page_mkwrite to use iomap_iter
Date: Tue, 10 Aug 2021 16:58:55 -0700	[thread overview]
Message-ID: <20210810235855.GO3601443@magnolia> (raw)
In-Reply-To: <20210809061244.1196573-17-hch@lst.de>

On Mon, Aug 09, 2021 at 08:12:30AM +0200, Christoph Hellwig wrote:
> Switch iomap_page_mkwrite to use iomap_iter.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>

Reviewed-by: Darrick J. Wong <djwong@kernel.org>

--D

> ---
>  fs/iomap/buffered-io.c | 39 +++++++++++++++++----------------------
>  1 file changed, 17 insertions(+), 22 deletions(-)
> 
> diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c
> index 3a23f7346938fb..5ab464937d4886 100644
> --- a/fs/iomap/buffered-io.c
> +++ b/fs/iomap/buffered-io.c
> @@ -961,15 +961,15 @@ iomap_truncate_page(struct inode *inode, loff_t pos, bool *did_zero,
>  }
>  EXPORT_SYMBOL_GPL(iomap_truncate_page);
>  
> -static loff_t
> -iomap_page_mkwrite_actor(struct inode *inode, loff_t pos, loff_t length,
> -		void *data, struct iomap *iomap, struct iomap *srcmap)
> +static loff_t iomap_page_mkwrite_iter(struct iomap_iter *iter,
> +		struct page *page)
>  {
> -	struct page *page = data;
> +	loff_t length = iomap_length(iter);
>  	int ret;
>  
> -	if (iomap->flags & IOMAP_F_BUFFER_HEAD) {
> -		ret = __block_write_begin_int(page, pos, length, NULL, iomap);
> +	if (iter->iomap.flags & IOMAP_F_BUFFER_HEAD) {
> +		ret = __block_write_begin_int(page, iter->pos, length, NULL,
> +					      &iter->iomap);
>  		if (ret)
>  			return ret;
>  		block_commit_write(page, 0, length);
> @@ -983,29 +983,24 @@ iomap_page_mkwrite_actor(struct inode *inode, loff_t pos, loff_t length,
>  
>  vm_fault_t iomap_page_mkwrite(struct vm_fault *vmf, const struct iomap_ops *ops)
>  {
> +	struct iomap_iter iter = {
> +		.inode		= file_inode(vmf->vma->vm_file),
> +		.flags		= IOMAP_WRITE | IOMAP_FAULT,
> +	};
>  	struct page *page = vmf->page;
> -	struct inode *inode = file_inode(vmf->vma->vm_file);
> -	unsigned long length;
> -	loff_t offset;
>  	ssize_t ret;
>  
>  	lock_page(page);
> -	ret = page_mkwrite_check_truncate(page, inode);
> +	ret = page_mkwrite_check_truncate(page, iter.inode);
>  	if (ret < 0)
>  		goto out_unlock;
> -	length = ret;
> -
> -	offset = page_offset(page);
> -	while (length > 0) {
> -		ret = iomap_apply(inode, offset, length,
> -				IOMAP_WRITE | IOMAP_FAULT, ops, page,
> -				iomap_page_mkwrite_actor);
> -		if (unlikely(ret <= 0))
> -			goto out_unlock;
> -		offset += ret;
> -		length -= ret;
> -	}
> +	iter.pos = page_offset(page);
> +	iter.len = ret;
> +	while ((ret = iomap_iter(&iter, ops)) > 0)
> +		iter.processed = iomap_page_mkwrite_iter(&iter, page);
>  
> +	if (ret < 0)
> +		goto out_unlock;
>  	wait_for_stable_page(page);
>  	return VM_FAULT_LOCKED;
>  out_unlock:
> -- 
> 2.30.2
> 

  reply	other threads:[~2021-08-10 23:58 UTC|newest]

Thread overview: 70+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-09  6:12 switch iomap to an iterator model v2 Christoph Hellwig
2021-08-09  6:12 ` [PATCH 01/30] iomap: fix a trivial comment typo in trace.h Christoph Hellwig
2021-08-09  6:12 ` [PATCH 02/30] iomap: remove the iomap arguments to ->page_{prepare,done} Christoph Hellwig
2021-08-09  6:12 ` [PATCH 03/30] iomap: mark the iomap argument to iomap_sector const Christoph Hellwig
2021-08-09  6:12 ` [PATCH 04/30] iomap: mark the iomap argument to iomap_inline_data const Christoph Hellwig
2021-08-09 16:17   ` Darrick J. Wong
2021-08-09  6:12 ` [PATCH 05/30] iomap: mark the iomap argument to iomap_inline_data_valid const Christoph Hellwig
2021-08-09 16:17   ` Darrick J. Wong
2021-08-09  6:12 ` [PATCH 06/30] fs: mark the iomap argument to __block_write_begin_int const Christoph Hellwig
2021-08-09  6:12 ` [PATCH 07/30] fsdax: mark the iomap argument to dax_iomap_sector as const Christoph Hellwig
2021-08-19 20:35   ` Dan Williams
2021-08-09  6:12 ` [PATCH 08/30] iomap: mark the iomap argument to iomap_read_inline_data const Christoph Hellwig
2021-08-09  6:12 ` [PATCH 09/30] iomap: mark the iomap argument to iomap_read_page_sync const Christoph Hellwig
2021-08-09  6:12 ` [PATCH 10/30] iomap: fix the iomap_readpage_actor return value for inline data Christoph Hellwig
2021-08-10 23:31   ` Darrick J. Wong
2021-08-09  6:12 ` [PATCH 11/30] iomap: add the new iomap_iter model Christoph Hellwig
2021-08-09 22:10   ` Dave Chinner
2021-08-10  6:45     ` Darrick J. Wong
2021-08-10  7:13       ` Christoph Hellwig
2021-08-11  0:31   ` Darrick J. Wong
2021-08-11  5:38     ` Christoph Hellwig
2021-08-11 19:17       ` Darrick J. Wong
2021-08-12  6:49         ` Christoph Hellwig
2021-08-12 18:20           ` Darrick J. Wong
2021-08-13  7:29             ` Christoph Hellwig
2021-08-11 19:17   ` [PATCH v2.1 " Darrick J. Wong
2021-08-17  2:34     ` Dave Chinner
2021-08-19 21:25   ` [PATCH " Dan Williams
2021-08-20  4:11     ` Christoph Hellwig
2021-08-20 15:27       ` Dan Williams
2021-08-09  6:12 ` [PATCH 12/30] iomap: switch readahead and readpage to use iomap_iter Christoph Hellwig
2021-08-10 23:46   ` Darrick J. Wong
2021-08-09  6:12 ` [PATCH 13/30] iomap: switch iomap_file_buffered_write " Christoph Hellwig
2021-08-10 23:53   ` Darrick J. Wong
2021-08-09  6:12 ` [PATCH 14/30] iomap: switch iomap_file_unshare " Christoph Hellwig
2021-08-10 23:54   ` Darrick J. Wong
2021-08-09  6:12 ` [PATCH 15/30] iomap: switch iomap_zero_range " Christoph Hellwig
2021-08-10 23:54   ` Darrick J. Wong
2021-08-09  6:12 ` [PATCH 16/30] iomap: switch iomap_page_mkwrite " Christoph Hellwig
2021-08-10 23:58   ` Darrick J. Wong [this message]
2021-08-09  6:12 ` [PATCH 17/30] iomap: switch __iomap_dio_rw " Christoph Hellwig
2021-08-11  0:17   ` Darrick J. Wong
2021-08-09  6:12 ` [PATCH 18/30] iomap: switch iomap_fiemap " Christoph Hellwig
2021-08-11  0:05   ` Darrick J. Wong
2021-08-09  6:12 ` [PATCH 19/30] iomap: switch iomap_bmap " Christoph Hellwig
2021-08-10  6:39   ` Darrick J. Wong
2021-08-10  7:13     ` Christoph Hellwig
2021-08-11 19:18   ` [PATCH v2.1 " Darrick J. Wong
2021-08-12  6:50     ` Christoph Hellwig
2021-08-17  2:35     ` Dave Chinner
2021-08-09  6:12 ` [PATCH 20/30] iomap: switch iomap_seek_hole " Christoph Hellwig
2021-08-11  0:13   ` Darrick J. Wong
2021-08-09  6:12 ` [PATCH 21/30] iomap: switch iomap_seek_data " Christoph Hellwig
2021-08-11  0:12   ` Darrick J. Wong
2021-08-09  6:12 ` [PATCH 22/30] iomap: switch iomap_swapfile_activate " Christoph Hellwig
2021-08-11  0:08   ` Darrick J. Wong
2021-08-09  6:12 ` [PATCH 23/30] fsdax: switch dax_iomap_rw " Christoph Hellwig
2021-08-11  0:07   ` Darrick J. Wong
2021-08-19 21:55   ` Dan Williams
2021-08-09  6:12 ` [PATCH 24/30] iomap: remove iomap_apply Christoph Hellwig
2021-08-11 19:18   ` [PATCH v2.1 " Darrick J. Wong
2021-08-17  2:36     ` Dave Chinner
2021-08-09  6:12 ` [PATCH 25/30] iomap: pass an iomap_iter to various buffered I/O helpers Christoph Hellwig
2021-08-09  6:12 ` [PATCH 26/30] iomap: rework unshare flag Christoph Hellwig
2021-08-09  6:12 ` [PATCH 27/30] fsdax: factor out helpers to simplify the dax fault code Christoph Hellwig
2021-08-09  6:12 ` [PATCH 28/30] fsdax: factor out a dax_fault_actor() helper Christoph Hellwig
2021-08-09  6:12 ` [PATCH 29/30] fsdax: switch the fault handlers to use iomap_iter Christoph Hellwig
2021-08-09  6:12 ` [PATCH 30/30] iomap: constify iomap_iter_srcmap Christoph Hellwig
2021-08-11 19:19 ` [PATCH 31/30] iomap: move iomap iteration code to iter.c Darrick J. Wong
2021-08-17  2:37   ` Dave Chinner

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