Re: [Qemu-devel] [Nbd] [PATCH v5] doc: Add NBD_CMD_BLOCK_STATUS extension (part 2)

[Alex Bligh]

> On 12 Dec 2016, at 20:43, Wouter Verhelst <address@hidden> wrote:
> 
> +- `NBD_OPT_SET_META_CONTEXT` (11)
> +
> +    Change the set of active metadata contexts. Issuing this command
> +    replaces all previously-set metadata contexts; clients must ensure
> +    that all metadata contexts they're interested in are selected with
> +    the final query that they sent.
> +
> +    Data:
> +    - 32 bits, length of query
> +    - String, query to select metadata contexts. The syntax of this
> +      query is implementation-defined, except that it MUST start with a
> +      namespace. This namespace may be one of the following:
> +        - `base:`, for metadata contexts defined by this document;
> +        - `nbd-server:`, for metadata contexts defined by the
> +          implementation that accompanies this document (none
> +          currently);
> +        - `x-*:`, where `*` can be replaced by any random string not
> +          containing colons, for local experiments. This SHOULD NOT be
> +          used by metadata contexts that are expected to e widely used.
> +        - third-party implementations can register additional
> +          namespaces by simple request to the mailinglist.

Surely also we need to specify multiple queries?


--
Alex Bligh

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