[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

docs: Update vhost-user spec regarding backend program conventions

From: Boeuf, Sebastien
Subject: docs: Update vhost-user spec regarding backend program conventions
Date: Tue, 11 Feb 2020 15:24:18 +0000

From c073d528b8cd7082832fd1825dc33dd65b305aa2 Mon Sep 17 00:00:00 2001
From: Sebastien Boeuf <address@hidden>
Date: Tue, 11 Feb 2020 16:01:22 +0100
Subject: [PATCH] docs: Update vhost-user spec regarding backend program

The vhost-user specification is not clearly stating the expected
behavior from a backend program whenever the client disconnects.

This patch addresses the issue by defining the default behavior and
proposing an alternative through a command line option.

By default, a backend program will have to keep listening even if the
client disconnects, unless told otherwise through the newly introduced
option --exit-on-disconnect.

Signed-off-by: Sebastien Boeuf <address@hidden>
Signed-off-by: Stefan Hajnoczi <address@hidden>
 docs/interop/vhost-user.rst | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/docs/interop/vhost-user.rst b/docs/interop/vhost-user.rst
index 5f8b3a456b..da9a1ebc4c 100644
--- a/docs/interop/vhost-user.rst
+++ b/docs/interop/vhost-user.rst
@@ -1323,6 +1323,10 @@ The backend program must end (as quickly and cleanly as 
possible) when
 the SIGTERM signal is received. Eventually, it may receive SIGKILL by
 the management layer after a few seconds.
+By default, the backend program continues running after the client
+disconnects. It accepts only 1 connection at a time on each UNIX domain
 The following command line options have an expected behaviour. They
 are mandatory, unless explicitly said differently:
@@ -1337,6 +1341,12 @@ are mandatory, unless explicitly said differently:
   vhost-user socket as file descriptor FDNUM. It is incompatible with
+  When this option is provided, the backend program must terminate when
+  the client disconnects. This can be used to keep the backend program's
+  lifetime synchronized with its client process.
   Output to stdout the backend capabilities in JSON format, and then

Intel Corporation SAS (French simplified joint stock company)
Registered headquarters: "Les Montalets"- 2, rue de Paris, 
92196 Meudon Cedex, France
Registration Number:  302 456 199 R.C.S. NANTERRE
Capital: 4,572,000 Euros

This e-mail and any attachments may contain confidential material for
the sole use of the intended recipient(s). Any review or distribution
by others is strictly prohibited. If you are not the intended
recipient, please contact the sender and delete all copies.

reply via email to

[Prev in Thread] Current Thread [Next in Thread]