[PATCH 4/4] docs: Document xenstore paths for domain network address information

[Paul Durrant <paul.durrant@citrix.com>]

It is useful to be able to see the network addresses in use by a domain
for a particular vif in xenstore, for example so that ssh can be invoked
by a toolstack to log into the guest domain.

This patch documents paths to allow a domain to advertise MAC (unicast
and multicast) and IP (versions 4 and 6) address information.

Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
Cc: Ian Campbell <ian.campbell@citrix.com>
Cc: Ian Jackson <ian.jackson@eu.citrix.com>
Cc: Jan Beulich <jbeulich@suse.com>
Cc: Keir Fraser <keir@xen.org>
Cc: Tim Deegan <tim@xen.org>
---
 docs/misc/xenstore-paths.markdown | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/docs/misc/xenstore-paths.markdown b/docs/misc/xenstore-paths.markdown
index 9e98d6f..68d3dbf 100644
--- a/docs/misc/xenstore-paths.markdown
+++ b/docs/misc/xenstore-paths.markdown
@@ -39,6 +39,8 @@ before regexp expansion:
 * $UUID -- a UUID in the form xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
 * $NAME -- a string identifying an object within a domain. Typically
   comprising only alphanumeric characters.
+* $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:
 
@@ -56,6 +58,13 @@ VALUES are strings and can take the following forms:
 * VERSION -- 2 or 3 integers, in decimal form separated by ".",
              specifying major version, minor version, and then
 	     (optionally) micro version.
+* MAC_ADDRESS -- 6 integers, in hexadecimal form, separated by ':',
+                 specifying an ethernet MAC address.
+* IPV4_ADDRESS -- 4 integers, in decimal form, separated by '.',
+                  specifying an IP version 4 address.
+* IPV6_ADDRESS -- 8 integers, in hexadecimal form, separated by ':',
+                  specifying an IP version 6 address. (There should
+                  be strictly 8 integers i.e. '::' compression).
 
 Additional TAGS may follow as a comma separated set of the following
 tags enclosed in square brackets.
@@ -399,6 +408,26 @@ An HVM domain can indicate to a toolstack that it is capable
 of responding to instantiation of a new vbd by bringing online a
 new PV block device without the need for a reboot.
 
+#### ~/attr/vif/$DEVID/name = STRING [w]
+
+A domain may write its internal 'friendly' name for a network device
+using this path.
+
+#### ~/attr/vif/$DEVID/mac/$INDEX = MAC_ADDRESS [w]
+
+A domain may write the set of MAC addresses (unicast and multicast)
+in use by the network frontend using paths of this form.
+
+#### ~/attr/vif/$DEVID/ipv4/$INDEX = IPV4_ADDRESS [w]
+
+A domain may write the set of IP version 4 addresses in use by the
+stack bound to the network frontend using paths of this form.
+
+#### ~/attr/vif/$DEVID/ipv6/$INDEX = IPV6_ADDRESS [w]
+
+A domain may write the set of IP version 6 addresses in use by the
+stack bound to the network frontend using paths of this form.
+
 ### Paths private to the toolstack
 
 #### ~/device-model/$DOMID/state [w]
-- 
2.1.4