diff mbox series

[07/13] iomap: update ki_pos in iomap_file_buffered_write

Message ID 20230519093521.133226-8-hch@lst.de
State Superseded
Headers show
Series [01/13] iomap: update ki_pos a little later in iomap_dio_complete | expand

Commit Message

Christoph Hellwig May 19, 2023, 9:35 a.m. UTC
All callers of iomap_file_buffered_write need to updated ki_pos, move it
into common code.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 fs/gfs2/file.c         | 4 +---
 fs/iomap/buffered-io.c | 9 ++++++---
 fs/xfs/xfs_file.c      | 2 --
 fs/zonefs/file.c       | 4 +---
 4 files changed, 8 insertions(+), 11 deletions(-)

Comments

Damien Le Moal May 22, 2023, 12:01 a.m. UTC | #1
On 5/19/23 18:35, Christoph Hellwig wrote:
> All callers of iomap_file_buffered_write need to updated ki_pos, move it
> into common code.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>

One nit below.

Acked-by: Damien Le Moal <dlemoal@kernel.org>

> diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c
> index 063133ec77f49e..550525a525c45c 100644
> --- a/fs/iomap/buffered-io.c
> +++ b/fs/iomap/buffered-io.c
> @@ -864,16 +864,19 @@ iomap_file_buffered_write(struct kiocb *iocb, struct iov_iter *i,
>  		.len		= iov_iter_count(i),
>  		.flags		= IOMAP_WRITE,
>  	};
> -	int ret;
> +	ssize_t ret;
>  
>  	if (iocb->ki_flags & IOCB_NOWAIT)
>  		iter.flags |= IOMAP_NOWAIT;
>  
>  	while ((ret = iomap_iter(&iter, ops)) > 0)
>  		iter.processed = iomap_write_iter(&iter, i);
> -	if (iter.pos == iocb->ki_pos)
> +
> +	if (unlikely(ret < 0))

Nit: This could be if (unlikely(ret <= 0)), no ?

>  		return ret;
> -	return iter.pos - iocb->ki_pos;
> +	ret = iter.pos - iocb->ki_pos;
> +	iocb->ki_pos += ret;
> +	return ret;
Christoph Hellwig May 23, 2023, 4:02 p.m. UTC | #2
On Mon, May 22, 2023 at 09:01:05AM +0900, Damien Le Moal wrote:
> > -	int ret;
> > +	ssize_t ret;
> >  
> >  	if (iocb->ki_flags & IOCB_NOWAIT)
> >  		iter.flags |= IOMAP_NOWAIT;
> >  
> >  	while ((ret = iomap_iter(&iter, ops)) > 0)
> >  		iter.processed = iomap_write_iter(&iter, i);
> > -	if (iter.pos == iocb->ki_pos)
> > +
> > +	if (unlikely(ret < 0))
> 
> Nit: This could be if (unlikely(ret <= 0)), no ?

No.  iomap_iter does not return te amount of bytes written.
diff mbox series

Patch

diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c
index 300844f50dcd28..499ef174dec138 100644
--- a/fs/gfs2/file.c
+++ b/fs/gfs2/file.c
@@ -1046,10 +1046,8 @@  static ssize_t gfs2_file_buffered_write(struct kiocb *iocb,
 	ret = iomap_file_buffered_write(iocb, from, &gfs2_iomap_ops);
 	pagefault_enable();
 	current->backing_dev_info = NULL;
-	if (ret > 0) {
-		iocb->ki_pos += ret;
+	if (ret > 0)
 		written += ret;
-	}
 
 	if (inode == sdp->sd_rindex)
 		gfs2_glock_dq_uninit(statfs_gh);
diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c
index 063133ec77f49e..550525a525c45c 100644
--- a/fs/iomap/buffered-io.c
+++ b/fs/iomap/buffered-io.c
@@ -864,16 +864,19 @@  iomap_file_buffered_write(struct kiocb *iocb, struct iov_iter *i,
 		.len		= iov_iter_count(i),
 		.flags		= IOMAP_WRITE,
 	};
-	int ret;
+	ssize_t ret;
 
 	if (iocb->ki_flags & IOCB_NOWAIT)
 		iter.flags |= IOMAP_NOWAIT;
 
 	while ((ret = iomap_iter(&iter, ops)) > 0)
 		iter.processed = iomap_write_iter(&iter, i);
-	if (iter.pos == iocb->ki_pos)
+
+	if (unlikely(ret < 0))
 		return ret;
-	return iter.pos - iocb->ki_pos;
+	ret = iter.pos - iocb->ki_pos;
+	iocb->ki_pos += ret;
+	return ret;
 }
 EXPORT_SYMBOL_GPL(iomap_file_buffered_write);
 
diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
index aede746541f8ae..bfba10e0b0f3c2 100644
--- a/fs/xfs/xfs_file.c
+++ b/fs/xfs/xfs_file.c
@@ -723,8 +723,6 @@  xfs_file_buffered_write(
 	trace_xfs_file_buffered_write(iocb, from);
 	ret = iomap_file_buffered_write(iocb, from,
 			&xfs_buffered_write_iomap_ops);
-	if (likely(ret >= 0))
-		iocb->ki_pos += ret;
 
 	/*
 	 * If we hit a space limit, try to free up some lingering preallocated
diff --git a/fs/zonefs/file.c b/fs/zonefs/file.c
index 132f01d3461f14..e212d0636f848e 100644
--- a/fs/zonefs/file.c
+++ b/fs/zonefs/file.c
@@ -643,9 +643,7 @@  static ssize_t zonefs_file_buffered_write(struct kiocb *iocb,
 		goto inode_unlock;
 
 	ret = iomap_file_buffered_write(iocb, from, &zonefs_write_iomap_ops);
-	if (ret > 0)
-		iocb->ki_pos += ret;
-	else if (ret == -EIO)
+	if (ret == -EIO)
 		zonefs_io_error(inode, true);
 
 inode_unlock: