linux-kernel - Re: [PATCH 02/39] vfs: dedupe: rationalize args

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Date:   Wed, 6 Jun 2018 08:02:33 -0700
From:   "Darrick J. Wong" <darrick.wong@...cle.com>
To:     Miklos Szeredi <mszeredi@...hat.com>
Cc:     linux-unionfs@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 02/39] vfs: dedupe: rationalize args

On Tue, May 29, 2018 at 04:43:02PM +0200, Miklos Szeredi wrote:
> Clean up f_op->dedupe_file_range() interface.
> 
> 1) Use loff_t for offsets and length instead of u64
> 2) Order the arguments the same way as {copy|clone}_file_range().
> 
> Signed-off-by: Miklos Szeredi <mszeredi@...hat.com>
> ---
>  fs/btrfs/ctree.h   | 5 +++--
>  fs/btrfs/ioctl.c   | 5 +++--
>  fs/ocfs2/file.c    | 6 +++---
>  fs/read_write.c    | 4 ++--
>  fs/xfs/xfs_file.c  | 6 +++---
>  include/linux/fs.h | 4 ++--
>  6 files changed, 16 insertions(+), 14 deletions(-)
> 
> diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
> index 990e011c9f0c..5968ba5aa0d1 100644
> --- a/fs/btrfs/ctree.h
> +++ b/fs/btrfs/ctree.h
> @@ -3271,8 +3271,9 @@ void btrfs_get_block_group_info(struct list_head *groups_list,
>  				struct btrfs_ioctl_space_info *space);
>  void update_ioctl_balance_args(struct btrfs_fs_info *fs_info, int lock,
>  			       struct btrfs_ioctl_balance_args *bargs);
> -loff_t btrfs_dedupe_file_range(struct file *src_file, u64 loff, u64 olen,
> -			    struct file *dst_file, u64 dst_loff);
> +loff_t btrfs_dedupe_file_range(struct file *src_file, loff_t loff,
> +			       struct file *dst_file, loff_t dst_loff,
> +			       loff_t olen);
>  
>  /* file.c */
>  int __init btrfs_auto_defrag_init(void);
> diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
> index 1b5cc5fd4868..70eac76804df 100644
> --- a/fs/btrfs/ioctl.c
> +++ b/fs/btrfs/ioctl.c
> @@ -3194,8 +3194,9 @@ static int btrfs_extent_same(struct inode *src, u64 loff, u64 olen,
>  
>  #define BTRFS_MAX_DEDUPE_LEN	SZ_16M
>  
> -loff_t btrfs_dedupe_file_range(struct file *src_file, u64 loff, u64 olen,
> -			       struct file *dst_file, u64 dst_loff)
> +loff_t btrfs_dedupe_file_range(struct file *src_file, loff_t loff,
> +			       struct file *dst_file, loff_t dst_loff,
> +			       loff_t olen)
>  {
>  	struct inode *src = file_inode(src_file);
>  	struct inode *dst = file_inode(dst_file);
> diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
> index 4a81d82ab7f6..a024715cd227 100644
> --- a/fs/ocfs2/file.c
> +++ b/fs/ocfs2/file.c
> @@ -2538,10 +2538,10 @@ static int ocfs2_file_clone_range(struct file *file_in,
>  }
>  
>  static loff_t ocfs2_file_dedupe_range(struct file *src_file,
> -				      u64 loff,
> -				      u64 len,
> +				      loff_t loff,
>  				      struct file *dst_file,
> -				      u64 dst_loff)
> +				      loff_t dst_loff,
> +				      loff_t len)
>  {
>  	int error;
>  
> diff --git a/fs/read_write.c b/fs/read_write.c
> index c41e2a1eb7c7..1818581cadf6 100644
> --- a/fs/read_write.c
> +++ b/fs/read_write.c
> @@ -2046,8 +2046,8 @@ int vfs_dedupe_file_range(struct file *file, struct file_dedupe_range *same)
>  			info->status = -EINVAL;
>  		} else {
>  			deduped = dst_file->f_op->dedupe_file_range(file, off,
> -							len, dst_file,
> -							info->dest_offset);
> +							dst_file,
> +							info->dest_offset, len);
>  			if (deduped == -EBADE)
>  				info->status = FILE_DEDUPE_RANGE_DIFFERS;
>  			else if (deduped < 0)
> diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
> index cf51d47efdb6..75704edfba82 100644
> --- a/fs/xfs/xfs_file.c
> +++ b/fs/xfs/xfs_file.c
> @@ -875,10 +875,10 @@ xfs_file_clone_range(
>  STATIC loff_t
>  xfs_file_dedupe_range(
>  	struct file	*src_file,
> -	u64		loff,
> -	u64		len,
> +	loff_t		loff,
>  	struct file	*dst_file,
> -	u64		dst_loff)
> +	loff_t		dst_loff,
> +	loff_t		len)
>  {
>  	struct inode	*srci = file_inode(src_file);
>  	u64		max_dedupe;
> diff --git a/include/linux/fs.h b/include/linux/fs.h
> index 8e49defc7aab..b0f290944220 100644
> --- a/include/linux/fs.h
> +++ b/include/linux/fs.h
> @@ -1738,8 +1738,8 @@ struct file_operations {
>  			loff_t, size_t, unsigned int);
>  	int (*clone_file_range)(struct file *, loff_t, struct file *, loff_t,
>  			u64);
> -	loff_t (*dedupe_file_range)(struct file *, u64, u64, struct file *,
> -			u64);
> +	loff_t (*dedupe_file_range)(struct file *, loff_t,
> +				    struct file *, loff_t, loff_t);
>  } __randomize_layout;

XFS/vfs parts look ok,
Reviewed-by: Darrick J. Wong <darrick.wong@...cle.com>

--D

>  
>  struct inode_operations {
> -- 
> 2.14.3
>