[libvirt] [PATCH v2 16/16] docs: formatdomaincaps: Describe optional XML changes

Cole Robinson crobinso at redhat.com
Wed Mar 6 23:38:25 UTC 2019


Signed-off-by: Cole Robinson <crobinso at redhat.com>
---
 docs/formatdomaincaps.html.in | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/docs/formatdomaincaps.html.in b/docs/formatdomaincaps.html.in
index ba48daab2d..2583f9bead 100644
--- a/docs/formatdomaincaps.html.in
+++ b/docs/formatdomaincaps.html.in
@@ -37,6 +37,17 @@
     management application to choose an appropriate mode for a pass-through
     host device as well as which adapter to utilize.</p>
 
+    <p>Some XML elements may be entirely omitted from the domaincapabilities
+    XML, depending on what the libvirt driver has filled in. Applications
+    should only act on what is explicitly reported in the domaincapabilities
+    XML. For example, if <disk supported='yes'/> is present, you can safely
+    assume the driver supports <disk> devices. If <disk supported='no'/> is
+    present, you can safely assume the driver does NOT support <disk>
+    devices. If the <disk> block is omitted entirely, the driver is not
+    indicating one way or the other whether it supports <disk> devices, and
+    applications should not interpret the missing block to mean any thing in
+    particular.</p>
+
     <h2><a id="elements">Element and attribute overview</a></h2>
 
     <p> A new query interface was added to the virConnect API's to retrieve the
-- 
2.20.1




More information about the libvir-list mailing list