For domain management purposes it is convenient to be able to see
information about PV drivers in xenstore. The XAPI toolstack in
XenServer has always created a ~/drivers path for this purpose.
This patch documents that path and also adds a specification of how
it should be used.
Signed-off-by: Paul Durrant <paul.durr...@citrix.com>
Cc: Ian Campbell <ian.campb...@citrix.com>
Cc: Ian Jackson <ian.jack...@eu.citrix.com>
Cc: Jan Beulich <jbeul...@suse.com>
Cc: Keir Fraser <k...@xen.org>
Cc: Tim Deegan <t...@xen.org>
---
v4:
- Rather than just version information, expand the definition of paths
under ~/drivers to include full distribution information, including
vendor name.
v2:
- Modify version specifier to allow for single-part version numbers
and also arbitrary string suffix (e.g. '-debug')
---
docs/misc/xenstore-paths.markdown | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/docs/misc/xenstore-paths.markdown
b/docs/misc/xenstore-paths.markdown
index 2d2ce46..808e3a0 100644
--- a/docs/misc/xenstore-paths.markdown
+++ b/docs/misc/xenstore-paths.markdown
@@ -37,6 +37,8 @@ before regexp expansion:
the "other" domain. i.e. ~ refers to the domain providing a service
while $DOMID is the consumer of that service.
* $UUID -- a UUID in the form xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
+* $INDEX -- an integer used as part of a path when listing a set of
+ values. Typically these integers are contiguous.
VALUES are strings and can take the following forms:
@@ -51,6 +53,23 @@ VALUES are strings and can take the following forms:
* (VALUE | VALUE | ... ) -- a set of alternatives. Alternatives are
separated by a "|" and all the alternatives are enclosed in "(" and
")".
+* DISTRIBUTION -- information about a software distribution, comprised
+ of 3 or 4 space separated fields as follows:
+
+ VENDOR -- Commonly used vendor short name,
+ e.g "Citrix" rather than "Citrix Systems
+ Inc."
+
+ PRODUCT -- Commonly used product (e.g. driver) name
+ without version information.
+
+ VERSION -- A version number that will sort properly
+ under coreutils version sorting (sort -V)
+ rules.
+
+ ATTRIBUTES -- Optional human readable text enclosed in
+ parentheses to denote attributes of the
+ software, e.g. "(debug)"
Additional TAGS may follow as a comma separated set of the following
tags enclosed in square brackets.
@@ -380,6 +399,11 @@ protocol definition.
A domain writable path. Available for arbitrary domain use.
+#### ~/drivers/$INDEX = DISTRIBUTION [w]
+
+A domain may write information about installed PV drivers using
+paths of this form.
+
### Paths private to the toolstack
#### ~/device-model/$DOMID/state [w]
--
2.1.4
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