btrfs: rename btrfs_punch_hole_range() to a more generic name

The function btrfs_punch_hole_range() is now used to replace all the file
extents in a given file range with an extent described in the given struct
btrfs_replace_extent_info argument. This extent can either be an existing
extent that is being cloned or it can be a new extent (namely a prealloc
extent). When that argument is NULL it only punches a hole (drops all the
existing extents) in the file range.

So rename the function to btrfs_replace_file_extents().

Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/ctree.h

@@ -3088,7 +3088,7 @@ int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
 		       struct btrfs_root *root, struct inode *inode, u64 start,
 		       u64 end, int drop_cache);
-int btrfs_punch_hole_range(struct inode *inode, struct btrfs_path *path,
+int btrfs_replace_file_extents(struct inode *inode, struct btrfs_path *path,
 			   const u64 start, const u64 end,
 			   struct btrfs_replace_extent_info *extent_info,
 			   struct btrfs_trans_handle **trans_out);

fs/btrfs/file.c

@@ -2659,7 +2659,7 @@ static int btrfs_insert_clone_extent(struct btrfs_trans_handle *trans,
  * extents without inserting a new one, so we must abort the transaction to avoid
  * a corruption.
  */
-int btrfs_punch_hole_range(struct inode *inode, struct btrfs_path *path,
+int btrfs_replace_file_extents(struct inode *inode, struct btrfs_path *path,
 			   const u64 start, const u64 end,
 			   struct btrfs_replace_extent_info *extent_info,
 			   struct btrfs_trans_handle **trans_out)
@@ -3007,7 +3007,7 @@ static int btrfs_punch_hole(struct inode *inode, loff_t offset, loff_t len)
 		goto out;
 	}
 
-	ret = btrfs_punch_hole_range(inode, path, lockstart, lockend, NULL,
+	ret = btrfs_replace_file_extents(inode, path, lockstart, lockend, NULL,
 				     &trans);
 	btrfs_free_path(path);
 	if (ret)

fs/btrfs/inode.c

@@ -9625,7 +9625,7 @@ static struct btrfs_trans_handle *insert_prealloc_file_extent(
 	if (!path)
 		return ERR_PTR(-ENOMEM);
 
-	ret = btrfs_punch_hole_range(inode, path, file_offset,
+	ret = btrfs_replace_file_extents(inode, path, file_offset,
 				     file_offset + len - 1, &extent_info,
 				     &trans);
 	btrfs_free_path(path);

fs/btrfs/reflink.c

@@ -463,7 +463,7 @@ static int btrfs_clone(struct inode *src, struct inode *inode,
 			clone_info.file_offset = new_key.offset;
 			clone_info.extent_buf = buf;
 			clone_info.is_new_extent = false;
-			ret = btrfs_punch_hole_range(inode, path, drop_start,
+			ret = btrfs_replace_file_extents(inode, path, drop_start,
 					new_key.offset + datal - 1, &clone_info,
 					&trans);
 			if (ret)
@@ -533,7 +533,7 @@ static int btrfs_clone(struct inode *src, struct inode *inode,
 		btrfs_release_path(path);
 		path->leave_spinning = 0;
 
-		ret = btrfs_punch_hole_range(inode, path, last_dest_end,
+		ret = btrfs_replace_file_extents(inode, path, last_dest_end,
 				destoff + len - 1, NULL, &trans);
 		if (ret)
 			goto out;