[PATCH v2 3/7] qemu: propagate iotune settings to all disks in the group

[Michal Privoznik <mprivozn@xxxxxxxxxx>]

From: Nikolay Shirokovskiy <nshirokovskiy@xxxxxxxxxxxxx>

Currently upon successfull call to qemu's implementation of
virDomainSetBlockIoTune iotune settings are changed only for the
disk given in API if the disk is in iotune group while we need
to change the settings for all disks in the group.

Signed-off-by: Nikolay Shirokovskiy <nshirokovskiy@xxxxxxxxxxxxx>
Signed-off-by: Michal Privoznik <mprivozn@xxxxxxxxxx>
---
 src/qemu/qemu_driver.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 048855b533..dfc7111937 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -19117,6 +19117,26 @@ qemuDomainSetBlockIoTuneDefaults(virDomainBlockIoTuneInfoPtr newinfo,
 }
 
 
+static void
+qemuDomainSetGroupBlockIoTune(virDomainDefPtr def,
+                              virDomainBlockIoTuneInfoPtr iotune)
+{
+    size_t i;
+
+    if (!iotune->group_name)
+        return;
+
+    for (i = 0; i < def->ndisks; i++) {
+        virDomainDiskDefPtr d = def->disks[i];
+
+        if (STREQ_NULLABLE(d->blkdeviotune.group_name, iotune->group_name)) {
+            VIR_FREE(d->blkdeviotune.group_name);
+            virDomainBlockIoTuneInfoCopy(iotune, &d->blkdeviotune);
+        }
+    }
+}
+
+
 static int
 qemuDomainSetBlockIoTune(virDomainPtr dom,
                          const char *path,
@@ -19419,6 +19439,8 @@ qemuDomainSetBlockIoTune(virDomainPtr dom,
         if (virDomainDiskSetBlockIOTune(disk, &info) < 0)
             goto endjob;
 
+        qemuDomainSetGroupBlockIoTune(def, &info);
+
         if (virDomainObjSave(vm, driver->xmlopt, cfg->stateDir) < 0)
             goto endjob;
 
@@ -19444,6 +19466,8 @@ qemuDomainSetBlockIoTune(virDomainPtr dom,
         if (virDomainDiskSetBlockIOTune(conf_disk, &info) < 0)
             goto endjob;
 
+        qemuDomainSetGroupBlockIoTune(persistentDef, &conf_info);
+
         if (virDomainDefSave(persistentDef, driver->xmlopt,
                              cfg->configDir) < 0)
             goto endjob;
-- 
2.24.1