[Libguestfs] [nbdkit PATCH 1/2] rust: Implement can_cache

[Eric Blake]

On 8/16/19 1:01 PM, Eric Blake wrote:
> On 8/16/19 12:08 PM, Eric Blake wrote:
>> Implementing extents requires some coordination for the Rust code to
>> call back into libnbdkit; I'm not familiar with Rust enough to do
>> that. But with placeholders for those slots, implementing
>> can_cache/cache is trivial.  This improves the situation mentioned in
>> commit 031fae85.
>>
>> Signed-off-by: Eric Blake <eblake at redhat.com>
>> ---

> And of course, if you want to actually implement extents, and figure out
> how to expose C-based nbdkit functions to be called by Rust code, be my
> guest (for .zero, we need nbdkit_set_error(), for extents, we need
> nbdkit_add_extent(), and then we have several other utility functions
> like nbdkit_realpath() that could be useful).

Also, we are lacking a tests/*rust* usage; it would be nice if 'make
check' covered a Rust plugin (more than just running 'nbdkit
plugins/rust/target/release/examples/libramdisk.so').

-- 
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3226
Virtualization:  qemu.org | libvirt.org

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