[libvirt] [PATCH v2] qemu: cold-unplug of sound

[Jidong Xia]

With this patch users can cold unplug some sound devices.
use "virsh detach-device vm sound.xml --config" command.

Signed-off-by: Jidong Xia <xiajidong at cmss.chinamobile.com>
---
 src/conf/domain_conf.c   | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
 src/conf/domain_conf.h   |  3 +++
 src/libvirt_private.syms |  2 ++
 src/qemu/qemu_driver.c   |  9 ++++++++-
 4 files changed, 61 insertions(+), 1 deletion(-)

diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index 9580884..4b28502 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -2753,6 +2753,14 @@ void virDomainSoundDefFree(virDomainSoundDefPtr def)
     VIR_FREE(def);
 }

+virDomainSoundDefPtr
+virDomainSoundDefRemove(virDomainDefPtr def, size_t idx)
+{
+    virDomainSoundDefPtr ret = def->sounds[idx];
+    VIR_DELETE_ELEMENT(def->sounds, idx, def->nsounds);
+    return ret;
+}
+
 void virDomainMemballoonDefFree(virDomainMemballoonDefPtr def)
 {
     if (!def)
@@ -14554,6 +14562,46 @@ virDomainSoundDefParseXML(virDomainXMLOptionPtr xmlopt,
 }


+static bool
+virDomainSoundDefEquals(const virDomainSoundDef *a,
+                        const virDomainSoundDef *b)
+{
+    size_t i;
+
+    if (a->model != b->model)
+        return false;
+
+    if (a->ncodecs != b->ncodecs)
+        return false;
+
+    for (i = 0; i < a->ncodecs; i++) {
+        if (a->codecs[i]->type != b->codecs[i]->type)
+            return false;
+    }
+
+    if (a->info.type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_NONE &&
+        !virDomainDeviceInfoAddressIsEqual(&a->info, &b->info))
+        return false;
+
+    return true;
+}
+
+
+ssize_t
+virDomainSoundDefFind(const virDomainDef *def,
+                      const virDomainSoundDef *sound)
+{
+    size_t i;
+
+    for (i = 0; i < def->nsounds; i++) {
+        if (virDomainSoundDefEquals(sound, def->sounds[i]))
+            return i;
+    }
+
+    return -1;
+}
+
+
 static virDomainWatchdogDefPtr
 virDomainWatchdogDefParseXML(virDomainXMLOptionPtr xmlopt,
                              xmlNodePtr node,
diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
index 49cb697..cdb7b92 100644
--- a/src/conf/domain_conf.h
+++ b/src/conf/domain_conf.h
@@ -2883,7 +2883,10 @@ void virDomainChrDefFree(virDomainChrDefPtr def);
 int virDomainChrSourceDefCopy(virDomainChrSourceDefPtr dest,
                               virDomainChrSourceDefPtr src);
 void virDomainSoundCodecDefFree(virDomainSoundCodecDefPtr def);
+ssize_t virDomainSoundDefFind(const virDomainDef *def,
+                              const virDomainSoundDef *sound);
 void virDomainSoundDefFree(virDomainSoundDefPtr def);
+virDomainSoundDefPtr virDomainSoundDefRemove(virDomainDefPtr def, size_t idx);
 void virDomainMemballoonDefFree(virDomainMemballoonDefPtr def);
 void virDomainNVRAMDefFree(virDomainNVRAMDefPtr def);
 void virDomainWatchdogDefFree(virDomainWatchdogDefPtr def);
diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index 8fe0bf9..cdbd64f 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -578,7 +578,9 @@ virDomainSmartcardTypeFromString;
 virDomainSmartcardTypeToString;
 virDomainSmbiosModeTypeFromString;
 virDomainSmbiosModeTypeToString;
+virDomainSoundDefFind;
 virDomainSoundDefFree;
+virDomainSoundDefRemove;
 virDomainSoundModelTypeFromString;
 virDomainSoundModelTypeToString;
 virDomainStartupPolicyTypeFromString;
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 18bd010..8d91bb2 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -8302,6 +8302,7 @@ qemuDomainDetachDeviceConfig(virDomainDefPtr vmdef,
 {
     virDomainDiskDefPtr disk, det_disk;
     virDomainNetDefPtr net;
+    virDomainSoundDefPtr sound;
     virDomainHostdevDefPtr hostdev, det_hostdev;
     virDomainLeaseDefPtr lease, det_lease;
     virDomainControllerDefPtr cont, det_cont;
@@ -8330,6 +8331,13 @@ qemuDomainDetachDeviceConfig(virDomainDefPtr vmdef,
         virDomainNetDefFree(virDomainNetRemove(vmdef, idx));
         break;

+    case VIR_DOMAIN_DEVICE_SOUND:
+        sound = dev->data.sound;
+        if ((idx = virDomainSoundDefFind(vmdef, sound)) < 0)
+            return -1;
+        virDomainSoundDefFree(virDomainSoundDefRemove(vmdef, idx));
+        break;
+
     case VIR_DOMAIN_DEVICE_HOSTDEV: {
         hostdev = dev->data.hostdev;
         if ((idx = virDomainHostdevFind(vmdef, hostdev, &det_hostdev)) < 0) {
@@ -8460,7 +8468,6 @@ qemuDomainDetachDeviceConfig(virDomainDefPtr vmdef,
         vmdef->vsock = NULL;
         break;

-    case VIR_DOMAIN_DEVICE_SOUND:
     case VIR_DOMAIN_DEVICE_VIDEO:
     case VIR_DOMAIN_DEVICE_GRAPHICS:
     case VIR_DOMAIN_DEVICE_HUB:
--
1.8.3.1