From: Olga Kornievskaia <kolga@xxxxxxxxxx> VFS copy_file_range was relaxed to allow for cross-device copy. Add a check for now, to disallow cross-device copy offload until appropriate support is added. Signed-off-by: Olga Kornievskaia <kolga@xxxxxxxxxx> --- fs/cifs/cifsfs.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c index 7065426..1f41e74 100644 --- a/fs/cifs/cifsfs.c +++ b/fs/cifs/cifsfs.c @@ -1114,6 +1114,8 @@ static ssize_t cifs_copy_file_range(struct file *src_file, loff_t off, unsigned int xid = get_xid(); ssize_t rc; + if (src_file->f_inode->i_sb != dst_file->f_inode->i_sb) + return -EXDEV; rc = cifs_file_copychunk_range(xid, src_file, off, dst_file, destoff, len, flags); free_xid(xid); -- 1.8.3.1
