From a76b5b04375f974579c83433b06466758c0c552c Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 9 Dec 2016 16:17:19 -0800 Subject: fs: try to clone files first in vfs_copy_file_range A clone is a perfectly fine implementation of a file copy, so most file systems just implement the copy that way. Instead of duplicating this logic move it to the VFS. Currently btrfs and XFS implement copies the same way as clones and there is no behavior change for them, cifs only implements clones and grow support for copy_file_range with this patch. NFS implements both, so this will allow copy_file_range to work on servers that only implement CLONE and be lot more efficient on servers that implements CLONE and COPY. Signed-off-by: Christoph Hellwig --- fs/xfs/xfs_file.c | 19 ------------------- 1 file changed, 19 deletions(-) (limited to 'fs/xfs') diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c index 6e4f7f900fea..86ecc9b49e15 100644 --- a/fs/xfs/xfs_file.c +++ b/fs/xfs/xfs_file.c @@ -909,24 +909,6 @@ out_unlock: return error; } -STATIC ssize_t -xfs_file_copy_range( - struct file *file_in, - loff_t pos_in, - struct file *file_out, - loff_t pos_out, - size_t len, - unsigned int flags) -{ - int error; - - error = xfs_reflink_remap_range(file_in, pos_in, file_out, pos_out, - len, false); - if (error) - return error; - return len; -} - STATIC int xfs_file_clone_range( struct file *file_in, @@ -1625,7 +1607,6 @@ const struct file_operations xfs_file_operations = { .fsync = xfs_file_fsync, .get_unmapped_area = thp_get_unmapped_area, .fallocate = xfs_file_fallocate, - .copy_file_range = xfs_file_copy_range, .clone_file_range = xfs_file_clone_range, .dedupe_file_range = xfs_file_dedupe_range, }; -- cgit v1.2.1