Re: [Xen-devel] [PATCH v1 1/6] docs: add feature document for Xen hypervisor sysfs-like support

[Ian Jackson <ian.jackson@xxxxxxxxxx>]

Juergen Gross writes ("[PATCH v1 1/6] docs: add feature document for Xen 
hypervisor sysfs-like support"):
> On the 2019 Xen developer summit there was agreement that the Xen
> hypervisor should gain support for a hierarchical name-value store
> similar to the Linux kernel's sysfs.
> 
> In the beginning there should only be basic support: entries can be
> added from the hypervisor itself only, there is a simple hypercall
> interface to read the data.
> 
> Add a feature document for setting the base of a discussion regarding
> the desired functionality and the entries to add.

Thanks for this work.  Like others, I approve of the basic idea.

Reading your spec document here, I think there is a key part missing:
please could you specify the allowable syntax for keys, and for
values.

I guess that keys will be chosen from some limited safe character
set ?  What about values ?  Might we create a key whose value contains
binary data ?

Depend on the answer to this question, I may want to suggest changes
or enhancements to your proposed command-line tool.

Also, your top-level document has a list of paths in it, which is
presumably prospective.  Maybe that information should be a non-parsed
header section in the paths document ?

Would it be possible to add a script to xen.git which lists the
xenhypfs and checks that all the paths are documented ?  We could add
a few calls to that to osstest...

Thanks,
Ian.

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