• Olga Kornievskaia's avatar
    NFSv4.1 fix incorrect return value in copy_file_range · 0769663b
    Olga Kornievskaia authored
    According to the NFSv4.2 spec if the input and output file is the
    same file, operation should fail with EINVAL. However, linux
    copy_file_range() system call has no such restrictions. Therefore,
    in such case let's return EOPNOTSUPP and allow VFS to fallback
    to doing do_splice_direct(). Also when copy_file_range is called
    on an NFSv4.0 or 4.1 mount (ie., a server that doesn't support
    COPY functionality), we also need to return EOPNOTSUPP and
    fallback to a regular copy.
    
    Fixes xfstest generic/075, generic/091, generic/112, generic/263
    for all NFSv4.x versions.
    Signed-off-by: default avatarOlga Kornievskaia <kolga@netapp.com>
    Signed-off-by: default avatarTrond Myklebust <trond.myklebust@hammerspace.com>
    0769663b
nfs42proc.c 23.9 KB