ksmbd: support copychunk for alternate data streams

Copychunk rejects requests when either handle refers to an alternate
data stream. These streams are stored in extended attributes and cannot
be passed directly to vfs_copy_file_range().

Use the bounded buffered copy path when a source or destination is a
stream. Obtain the source length from the stream extended attribute and
perform I/O through the existing stream-aware read and write helpers.
Keep vfs_copy_file_range() and its fallback for regular files only.

Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>

0 files changed, 0 insertions, 0 deletions