[OSSTEST PATCH 7/7] make-flight: Stripy xenstored

[Ian Jackson <iwj@xenproject.org>]

Previously, we let the Xen build system and startup scripts choose
which xenstored to use.  Before we upgraded to Debian buster, that
gave us C xentored tests on ARM.  Since then, armhf and arm64 have
both had enough ocaml support and we haven't been testing C xenstored
at all !

Change this, by selecting between C xenstored and Ocaml xenstored
"at random".  Actually, this is based on the job name.  So the same
job in different branches will use the same xenstored - which helps
avoid confusion.

I have diffed the output of standalone-generate-dump-flight-runvars.
As expected, this addes a variable all_host_xenstored to every job.

To make sure we have enough diversity, I eyeballed the results.  In
particular:
  * The smoke tests now have 2 C and 2 Ocaml, one of each on
    ARM and x86.
  * XTF tests have 2 oxenstored and 3 C xenstored.
  * The ovmf flight has one of each
  * The seabios and libvirt flights look reasonably mixed.

Most other flights have enough jobs that I think things are diverse
enough without looking at them all in detail.

I think this lack of testing needs fixing for the Xen 4.15 release.
So after review I intend to push this to osstest pretest, and may
force push it even if shows regressions.

CC: Edwin Török <edvin.torok@citrix.com>
CC: Christian Lindig <christian.lindig@citrix.com>
CC: Andrew Cooper <Andrew.Cooper3@citrix.com>
CC: Jürgen Groß <jgross@suse.com>
CC: Wei Liu <wl@xen.org>
Signed-off-by: Ian Jackson <iwj@xenproject.org>
Release-Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
---
 mfi-common | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/mfi-common b/mfi-common
index 35efd233..2834411f 100644
--- a/mfi-common
+++ b/mfi-common
@@ -509,6 +509,13 @@ job_create_test () {
   xenbuildjob="${bfi}build-$xenarch$xsm_suffix"
   buildjob="${bfi}build-$dom0arch$xsm_suffix"
 
+  local xenstored="$xenstored"
+  if [ "$xenstored" = "" ]; then
+    stripy_rand "$job 2" xenstored  xenstored oxenstored
+    # Without " <n>", all XTF jobs use oxenstored
+    # With " 1", All OVMF tests use xenstored
+  fi
+
   job_create_test_filter_callback \
     "$job" "$recipe" "$toolstack" "$xenarch" "$dom0arch" "$@" || return 0
 
@@ -529,7 +536,8 @@ job_create_test () {
 
   ./cs-job-create $flight $job $recipe toolstack=$toolstack       \
     $RUNVARS $TEST_RUNVARS $global_runvars $most_runvars          \
-    xenbuildjob=$xenbuildjob buildjob=$buildjob $tsbuildjob "$@"
+    xenbuildjob=$xenbuildjob buildjob=$buildjob                   \
+    all_host_xenstored=$xenstored $tsbuildjob "$@"
 }
 
 usual_debianhvm_image () {
-- 
2.20.1