diff mbox series

[02/13] filemap: update ki_pos in generic_perform_write

Message ID 20230519093521.133226-3-hch@lst.de (mailing list archive)
State New
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 generic_perform_write need to updated ki_pos, move it into
common code.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 fs/ceph/file.c | 2 --
 fs/ext4/file.c | 9 +++------
 fs/f2fs/file.c | 1 -
 fs/nfs/file.c  | 1 -
 mm/filemap.c   | 8 ++++----
 5 files changed, 7 insertions(+), 14 deletions(-)

Comments

Damien Le Moal May 21, 2023, 11:42 p.m. UTC | #1
On 5/19/23 18:35, Christoph Hellwig wrote:
> All callers of generic_perform_write need to updated ki_pos, move it into
> common code.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>

Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Xiubo Li May 22, 2023, 2:20 a.m. UTC | #2
On 5/19/23 17:35, Christoph Hellwig wrote:
> All callers of generic_perform_write need to updated ki_pos, move it into
> common code.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
>   fs/ceph/file.c | 2 --
>   fs/ext4/file.c | 9 +++------
>   fs/f2fs/file.c | 1 -
>   fs/nfs/file.c  | 1 -
>   mm/filemap.c   | 8 ++++----
>   5 files changed, 7 insertions(+), 14 deletions(-)
>
> diff --git a/fs/ceph/file.c b/fs/ceph/file.c
> index f4d8bf7dec88a8..feeb9882ef635a 100644
> --- a/fs/ceph/file.c
> +++ b/fs/ceph/file.c
> @@ -1894,8 +1894,6 @@ static ssize_t ceph_write_iter(struct kiocb *iocb, struct iov_iter *from)
>   		 * can not run at the same time
>   		 */
>   		written = generic_perform_write(iocb, from);
> -		if (likely(written >= 0))
> -			iocb->ki_pos = pos + written;
>   		ceph_end_io_write(inode);
>   	}
>   
> diff --git a/fs/ext4/file.c b/fs/ext4/file.c
> index d101b3b0c7dad8..50824831d31def 100644
> --- a/fs/ext4/file.c
> +++ b/fs/ext4/file.c
> @@ -291,12 +291,9 @@ static ssize_t ext4_buffered_write_iter(struct kiocb *iocb,
>   
>   out:
>   	inode_unlock(inode);
> -	if (likely(ret > 0)) {
> -		iocb->ki_pos += ret;
> -		ret = generic_write_sync(iocb, ret);
> -	}
> -
> -	return ret;
> +	if (unlikely(ret <= 0))
> +		return ret;
> +	return generic_write_sync(iocb, ret);
>   }
>   
>   static ssize_t ext4_handle_inode_extension(struct inode *inode, loff_t offset,
> diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
> index 5ac53d2627d20d..9e3855e43a7a63 100644
> --- a/fs/f2fs/file.c
> +++ b/fs/f2fs/file.c
> @@ -4522,7 +4522,6 @@ static ssize_t f2fs_buffered_write_iter(struct kiocb *iocb,
>   	current->backing_dev_info = NULL;
>   
>   	if (ret > 0) {
> -		iocb->ki_pos += ret;
>   		f2fs_update_iostat(F2FS_I_SB(inode), inode,
>   						APP_BUFFERED_IO, ret);
>   	}
> diff --git a/fs/nfs/file.c b/fs/nfs/file.c
> index f0edf5a36237d1..3cc87ae8473356 100644
> --- a/fs/nfs/file.c
> +++ b/fs/nfs/file.c
> @@ -658,7 +658,6 @@ ssize_t nfs_file_write(struct kiocb *iocb, struct iov_iter *from)
>   		goto out;
>   
>   	written = result;
> -	iocb->ki_pos += written;
>   	nfs_add_stats(inode, NFSIOS_NORMALWRITTENBYTES, written);
>   
>   	if (mntflags & NFS_MOUNT_WRITE_EAGER) {
> diff --git a/mm/filemap.c b/mm/filemap.c
> index b4c9bd368b7e58..4d0ec2fa1c7070 100644
> --- a/mm/filemap.c
> +++ b/mm/filemap.c
> @@ -3957,7 +3957,10 @@ ssize_t generic_perform_write(struct kiocb *iocb, struct iov_iter *i)
>   		balance_dirty_pages_ratelimited(mapping);
>   	} while (iov_iter_count(i));
>   
> -	return written ? written : status;
> +	if (!written)
> +		return status;
> +	iocb->ki_pos += written;
> +	return written;
>   }
>   EXPORT_SYMBOL(generic_perform_write);
>   
> @@ -4036,7 +4039,6 @@ ssize_t __generic_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
>   		endbyte = pos + status - 1;
>   		err = filemap_write_and_wait_range(mapping, pos, endbyte);
>   		if (err == 0) {
> -			iocb->ki_pos = endbyte + 1;
>   			written += status;
>   			invalidate_mapping_pages(mapping,
>   						 pos >> PAGE_SHIFT,
> @@ -4049,8 +4051,6 @@ ssize_t __generic_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
>   		}
>   	} else {
>   		written = generic_perform_write(iocb, from);
> -		if (likely(written > 0))
> -			iocb->ki_pos += written;
>   	}
>   out:
>   	current->backing_dev_info = NULL;

LGTM.

Reviewed-by: Xiubo Li <xiubli@redhat.com>

Thanks

- Xiubo
diff mbox series

Patch

diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index f4d8bf7dec88a8..feeb9882ef635a 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -1894,8 +1894,6 @@  static ssize_t ceph_write_iter(struct kiocb *iocb, struct iov_iter *from)
 		 * can not run at the same time
 		 */
 		written = generic_perform_write(iocb, from);
-		if (likely(written >= 0))
-			iocb->ki_pos = pos + written;
 		ceph_end_io_write(inode);
 	}
 
diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index d101b3b0c7dad8..50824831d31def 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -291,12 +291,9 @@  static ssize_t ext4_buffered_write_iter(struct kiocb *iocb,
 
 out:
 	inode_unlock(inode);
-	if (likely(ret > 0)) {
-		iocb->ki_pos += ret;
-		ret = generic_write_sync(iocb, ret);
-	}
-
-	return ret;
+	if (unlikely(ret <= 0))
+		return ret;
+	return generic_write_sync(iocb, ret);
 }
 
 static ssize_t ext4_handle_inode_extension(struct inode *inode, loff_t offset,
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 5ac53d2627d20d..9e3855e43a7a63 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -4522,7 +4522,6 @@  static ssize_t f2fs_buffered_write_iter(struct kiocb *iocb,
 	current->backing_dev_info = NULL;
 
 	if (ret > 0) {
-		iocb->ki_pos += ret;
 		f2fs_update_iostat(F2FS_I_SB(inode), inode,
 						APP_BUFFERED_IO, ret);
 	}
diff --git a/fs/nfs/file.c b/fs/nfs/file.c
index f0edf5a36237d1..3cc87ae8473356 100644
--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c
@@ -658,7 +658,6 @@  ssize_t nfs_file_write(struct kiocb *iocb, struct iov_iter *from)
 		goto out;
 
 	written = result;
-	iocb->ki_pos += written;
 	nfs_add_stats(inode, NFSIOS_NORMALWRITTENBYTES, written);
 
 	if (mntflags & NFS_MOUNT_WRITE_EAGER) {
diff --git a/mm/filemap.c b/mm/filemap.c
index b4c9bd368b7e58..4d0ec2fa1c7070 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -3957,7 +3957,10 @@  ssize_t generic_perform_write(struct kiocb *iocb, struct iov_iter *i)
 		balance_dirty_pages_ratelimited(mapping);
 	} while (iov_iter_count(i));
 
-	return written ? written : status;
+	if (!written)
+		return status;
+	iocb->ki_pos += written;
+	return written;
 }
 EXPORT_SYMBOL(generic_perform_write);
 
@@ -4036,7 +4039,6 @@  ssize_t __generic_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
 		endbyte = pos + status - 1;
 		err = filemap_write_and_wait_range(mapping, pos, endbyte);
 		if (err == 0) {
-			iocb->ki_pos = endbyte + 1;
 			written += status;
 			invalidate_mapping_pages(mapping,
 						 pos >> PAGE_SHIFT,
@@ -4049,8 +4051,6 @@  ssize_t __generic_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
 		}
 	} else {
 		written = generic_perform_write(iocb, from);
-		if (likely(written > 0))
-			iocb->ki_pos += written;
 	}
 out:
 	current->backing_dev_info = NULL;