diff mbox

[4/6] qemu-ga: guest-suspend-disk: don't emit a success response

Message ID 1336497889-23730-5-git-send-email-lcapitulino@redhat.com
State New
Headers show

Commit Message

Luiz Capitulino May 8, 2012, 5:24 p.m. UTC
Today, qemu-ga may not be able to emit a success response when
guest-suspend-disk completes. This happens because the VM may
vanish before qemu-ga is able to emit a response.

This semantic is a bit confusing, as it's not clear for clients if
they should wait for a response or how they should check for success.

This commit solves that problem by changing guest-suspend-disk to
never emit a success response and suggests in the documentation
what clients could do to check for success.

Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
---
 qapi-schema-guest.json |   16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)
diff mbox

Patch

diff --git a/qapi-schema-guest.json b/qapi-schema-guest.json
index 82f901a..64db215 100644
--- a/qapi-schema-guest.json
+++ b/qapi-schema-guest.json
@@ -363,17 +363,21 @@ 
 # For the best results it's strongly recommended to have the pm-utils
 # package installed in the guest.
 #
-# Returns: nothing on success
+# This command does NOT return a response on success. There is a high chance
+# the command succeeded if the VM exits with a zero exit status or, when
+# running with --no-shutdown, by issuing the query-status QMP command to
+# to confirm the VM status is "shutdown". However, the VM could also exit
+# (or set its status to "shutdown") due to other reasons.
+#
+# The following errors may be returned:
 #          If suspend to disk is not supported, Unsupported
 #
-# Notes: o This is an asynchronous request. There's no guarantee a response
-#          will be sent
-#        o It's strongly recommended to issue the guest-sync command before
-#          sending commands when the guest resumes
+# Notes: It's strongly recommended to issue the guest-sync command before
+#        sending commands when the guest resumes
 #
 # Since: 1.1
 ##
-{ 'command': 'guest-suspend-disk' }
+{ 'command': 'guest-suspend-disk', 'success-response': 'no' }
 
 ##
 # @guest-suspend-ram