[PATCH 0/2] FSCTL_SRV_COPYCHUNK_WRITE

[Jeremy Allison]

On Thu, Oct 17, 2013 at 12:36:59PM +0200, David Disseldorp wrote:
> This trivial patch series adds support for the FSCTL_SRV_COPYCHUNK_WRITE
> ioctl. It differs slightly from FSCTL_SRV_COPYCHUNK, in that it permits
> copy-chunk requests against targets where the destination file handle
> does not have read access.

Code works but I have two requests for a change.

Firstly, "bool dst_needs_rw" isn't clear enough.
It doesn't really articulate what the options
are here - they are really READ|WRITE, or WRITE.

There ought to be a better way to articulate
that (sorry, can't immediately think of that
now).

Second point:

+       case FSCTL_SRV_COPYCHUNK_WRITE:
+               /*
+                * [MS-SMB2] 2.2.31
+                * FSCTL_SRV_COPYCHUNK is issued when a handle has
+                * FILE_READ_DATA and FILE_WRITE_DATA access to the file;
+                * FSCTL_SRV_COPYCHUNK_WRITE is issued when a handle only has
+                * FILE_WRITE_DATA access.
+                */
+               cc_dst_needs_rw = false;
        case FSCTL_SRV_COPYCHUNK:

is a fallthough on a switch statement without at least
a comment showing this is intended. That's a horror and
an abomination :-) :-).

Jeremy.