From 87eb5eb2423213ac0e7315ce5d275f1ff80e0263 Mon Sep 17 00:00:00 2001
From: Miklos Szeredi <mszeredi@redhat.com>
Date: Fri, 6 Jul 2018 23:57:03 +0200
Subject: [PATCH] vfs: dedupe: rationalize args

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@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
---
 fs/btrfs/ctree.h   |  5 +++--
 fs/btrfs/ioctl.c   |  7 ++++---
 fs/ocfs2/file.c    | 12 ++++++------
 fs/read_write.c    |  4 ++--
 fs/xfs/xfs_file.c  | 12 ++++++------
 include/linux/fs.h |  2 +-
 6 files changed, 22 insertions(+), 20 deletions(-)

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 1c7c13334423..d9d924017dfb 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -3247,8 +3247,9 @@ void btrfs_get_block_group_info(struct list_head *groups_list,
 				struct btrfs_ioctl_space_info *space);
 void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info,
 			       struct btrfs_ioctl_balance_args *bargs);
-int btrfs_dedupe_file_range(struct file *src_file, u64 loff, u64 olen,
-			    struct file *dst_file, u64 dst_loff);
+int btrfs_dedupe_file_range(struct file *src_file, loff_t src_loff,
+			    struct file *dst_file, loff_t dst_loff,
+			    u64 olen);
 
 /* file.c */
 int __init btrfs_auto_defrag_init(void);
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 94dc8e6c44ce..755c9a306321 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -3600,8 +3600,9 @@ out_free:
 	return ret;
 }
 
-int btrfs_dedupe_file_range(struct file *src_file, u64 loff, u64 olen,
-			    struct file *dst_file, u64 dst_loff)
+int btrfs_dedupe_file_range(struct file *src_file, loff_t src_loff,
+			    struct file *dst_file, loff_t dst_loff,
+			    u64 olen)
 {
 	struct inode *src = file_inode(src_file);
 	struct inode *dst = file_inode(dst_file);
@@ -3616,7 +3617,7 @@ int btrfs_dedupe_file_range(struct file *src_file, u64 loff, u64 olen,
 		return -EINVAL;
 	}
 
-	return btrfs_extent_same(src, loff, olen, dst, dst_loff);
+	return btrfs_extent_same(src, src_loff, olen, dst, dst_loff);
 }
 
 static int clone_finish_inode_update(struct btrfs_trans_handle *trans,
diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index f96f018463f7..9fa35cb6f6e0 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -2537,13 +2537,13 @@ static int ocfs2_file_clone_range(struct file *file_in,
 					 len, false);
 }
 
-static int ocfs2_file_dedupe_range(struct file *src_file,
-				   u64 loff,
-				   u64 len,
-				   struct file *dst_file,
-				   u64 dst_loff)
+static int ocfs2_file_dedupe_range(struct file *file_in,
+				   loff_t pos_in,
+				   struct file *file_out,
+				   loff_t pos_out,
+				   u64 len)
 {
-	return ocfs2_reflink_remap_range(src_file, loff, dst_file, dst_loff,
+	return ocfs2_reflink_remap_range(file_in, pos_in, file_out, pos_out,
 					  len, true);
 }
 
diff --git a/fs/read_write.c b/fs/read_write.c
index fa64e51ef4cf..c31794f92c2c 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -2049,8 +2049,8 @@ 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 547ef7e8aec1..0f40ba54d83f 100644
--- a/fs/xfs/xfs_file.c
+++ b/fs/xfs/xfs_file.c
@@ -935,13 +935,13 @@ xfs_file_clone_range(
 
 STATIC int
 xfs_file_dedupe_range(
-	struct file	*src_file,
-	u64		loff,
-	u64		len,
-	struct file	*dst_file,
-	u64		dst_loff)
+	struct file	*file_in,
+	loff_t		pos_in,
+	struct file	*file_out,
+	loff_t		pos_out,
+	u64		len)
 {
-	return xfs_reflink_remap_range(src_file, loff, dst_file, dst_loff,
+	return xfs_reflink_remap_range(file_in, pos_in, file_out, pos_out,
 				     len, true);
 }
 
diff --git a/include/linux/fs.h b/include/linux/fs.h
index b81c4b7e339f..a8fee2f44981 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1749,7 +1749,7 @@ struct file_operations {
 			loff_t, size_t, unsigned int);
 	int (*clone_file_range)(struct file *, loff_t, struct file *, loff_t,
 			u64);
-	int (*dedupe_file_range)(struct file *, u64, u64, struct file *,
+	int (*dedupe_file_range)(struct file *, loff_t, struct file *, loff_t,
 			u64);
 } __randomize_layout;
 
-- 
2.30.2