[PATCH 06/26] qemu: add 'auto_start_delay' configuration parameter

[Daniel P. Berrangé <berrange@xxxxxxxxxx>]

This allows a user specified delay between autostart of each VM, giving
parity with the equivalent feature of libvirt-guests.

Signed-off-by: Daniel P. Berrangé <berrange@xxxxxxxxxx>
---
 src/qemu/libvirtd_qemu.aug         | 1 +
 src/qemu/qemu.conf.in              | 4 ++++
 src/qemu/qemu_conf.c               | 2 ++
 src/qemu/qemu_conf.h               | 1 +
 src/qemu/qemu_driver.c             | 1 +
 src/qemu/test_libvirtd_qemu.aug.in | 1 +
 6 files changed, 10 insertions(+)

diff --git a/src/qemu/libvirtd_qemu.aug b/src/qemu/libvirtd_qemu.aug
index 1377fd89cc..642093c40b 100644
--- a/src/qemu/libvirtd_qemu.aug
+++ b/src/qemu/libvirtd_qemu.aug
@@ -97,6 +97,7 @@ module Libvirtd_qemu =
                  | str_entry "auto_dump_path"
                  | bool_entry "auto_dump_bypass_cache"
                  | bool_entry "auto_start_bypass_cache"
+                 | int_entry "auto_start_delay"
 
    let process_entry = str_entry "hugetlbfs_mount"
                  | str_entry "bridge_helper"
diff --git a/src/qemu/qemu.conf.in b/src/qemu/qemu.conf.in
index d853136f10..a3e9bbfcf3 100644
--- a/src/qemu/qemu.conf.in
+++ b/src/qemu/qemu.conf.in
@@ -634,6 +634,10 @@
 #
 #auto_start_bypass_cache = 0
 
+# Delay in milliseconds between starting each VM, during autostart
+#
+#auto_start_delay = 0
+
 # If provided by the host and a hugetlbfs mount point is configured,
 # a guest may request huge page backing.  When this mount point is
 # unspecified here, determination of a host mount point in /proc/mounts
diff --git a/src/qemu/qemu_conf.c b/src/qemu/qemu_conf.c
index 8b9fe4e381..0b6b923bcb 100644
--- a/src/qemu/qemu_conf.c
+++ b/src/qemu/qemu_conf.c
@@ -638,6 +638,8 @@ virQEMUDriverConfigLoadSaveEntry(virQEMUDriverConfig *cfg,
         return -1;
     if (virConfGetValueBool(conf, "auto_start_bypass_cache", &cfg->autoStartBypassCache) < 0)
         return -1;
+    if (virConfGetValueInt(conf, "auto_start_delay", &cfg->autoStartDelayMS) < 0)
+        return -1;
 
     return 0;
 }
diff --git a/src/qemu/qemu_conf.h b/src/qemu/qemu_conf.h
index 42cdb6f883..61a2bdce51 100644
--- a/src/qemu/qemu_conf.h
+++ b/src/qemu/qemu_conf.h
@@ -200,6 +200,7 @@ struct _virQEMUDriverConfig {
     char *autoDumpPath;
     bool autoDumpBypassCache;
     bool autoStartBypassCache;
+    int autoStartDelayMS;
 
     char *lockManagerName;
 
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 45bfbd3727..f689dadc0a 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -887,6 +887,7 @@ qemuStateInitialize(bool privileged,
         .stateDir = cfg->stateDir,
         .callback = qemuAutostartDomain,
         .opaque = qemu_driver,
+        .delayMS = cfg->autoStartDelayMS,
     };
     virDomainDriverAutoStart(qemu_driver->domains, &autostartCfg);
 
diff --git a/src/qemu/test_libvirtd_qemu.aug.in b/src/qemu/test_libvirtd_qemu.aug.in
index 69fdae215a..c2a1d7d829 100644
--- a/src/qemu/test_libvirtd_qemu.aug.in
+++ b/src/qemu/test_libvirtd_qemu.aug.in
@@ -75,6 +75,7 @@ module Test_libvirtd_qemu =
 { "auto_dump_path" = "/var/lib/libvirt/qemu/dump" }
 { "auto_dump_bypass_cache" = "0" }
 { "auto_start_bypass_cache" = "0" }
+{ "auto_start_delay" = "0" }
 { "hugetlbfs_mount" = "/dev/hugepages" }
 { "bridge_helper" = "qemu-bridge-helper" }
 { "set_process_name" = "1" }
-- 
2.47.1