[v2] Implement GetIOThreadInfo method for Domain Interface

[libvirt] [dbus PATCH v2] Implement GetIOThreadInfo method for Domain Interface

Posted by Katerina Koukiou 7 years ago

Signed-off-by: Katerina Koukiou <kkoukiou@redhat.com>
---
 data/org.libvirt.Domain.xml |  6 +++++
 src/domain.c                | 63 +++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 69 insertions(+)

diff --git a/data/org.libvirt.Domain.xml b/data/org.libvirt.Domain.xml
index 96b9220..531cdb5 100644
--- a/data/org.libvirt.Domain.xml
+++ b/data/org.libvirt.Domain.xml
@@ -222,6 +222,12 @@
       <arg name="flags" type="u" direction="in"/>
       <arg name="interfaceParameters" type="a{sv}" direction="out"/>
     </method>
+    <method name="GetIOThreadInfo">
+      <annotation name="org.gtk.GDBus.DocString"
+        value="See https://libvirt.org/html/libvirt-libvirt-domain.html#virDomainGetIOThreadInfo"/>
+      <arg name="flags" type="u" direction="in"/>
+      <arg name="ioThreadInfo" type="a(uab)" direction="out"/>
+    </method>
     <method name="GetJobInfo">
       <annotation name="org.gtk.GDBus.DocString"
         value="See https://libvirt.org/html/libvirt-libvirt-domain.html#virDomainGetJobInfo"/>
diff --git a/src/domain.c b/src/domain.c
index 76eec1d..e7b4b24 100644
--- a/src/domain.c
+++ b/src/domain.c
@@ -85,6 +85,25 @@ virtDBusDomainFSInfoListClear(virtDBusDomainFSInfoList *info)
 G_DEFINE_AUTO_CLEANUP_CLEAR_FUNC(virtDBusDomainFSInfoList,
                                  virtDBusDomainFSInfoListClear);
 
+struct _virtDBusDomainIOThreadInfoList {
+    virDomainIOThreadInfoPtr *info;
+    gint count;
+};
+
+typedef struct _virtDBusDomainIOThreadInfoList virtDBusDomainIOThreadInfoList;
+
+static void
+virtDBusDomainIOThreadInfoListClear(virtDBusDomainIOThreadInfoList *info)
+{
+    for (gint i = 0; i < info->count; i++)
+        virDomainIOThreadInfoFree(info->info[i]);
+
+    g_free(info->info);
+}
+
+G_DEFINE_AUTO_CLEANUP_CLEAR_FUNC(virtDBusDomainIOThreadInfoList,
+                                 virtDBusDomainIOThreadInfoListClear);
+
 static GVariant *
 virtDBusDomainMemoryStatsToGVariant(virDomainMemoryStatPtr stats,
                                     gint nr_stats)
@@ -1218,6 +1237,49 @@ virtDBusDomainGetInterfaceParameters(GVariant *inArgs,
     *outArgs = g_variant_new_tuple(&grecords, 1);
 }
 
+static void
+virtDBusDomainGetIOThreadInfo(GVariant *inArgs,
+                              GUnixFDList *inFDs G_GNUC_UNUSED,
+                              const gchar *objectPath,
+                              gpointer userData,
+                              GVariant **outArgs,
+                              GUnixFDList **outFDs G_GNUC_UNUSED,
+                              GError **error)
+{
+    virtDBusConnect *connect = userData;
+    g_autoptr(virDomain) domain = NULL;
+    g_auto(virtDBusDomainIOThreadInfoList) info = { 0 };
+    GVariantBuilder builder;
+    guint flags;
+    GVariant *gret;
+
+    g_variant_get(inArgs, "(u)", &flags);
+
+    domain = virtDBusDomainGetVirDomain(connect, objectPath, error);
+    if (!domain)
+        return;
+
+    info.count = virDomainGetIOThreadInfo(domain, &info.info, flags);
+    if (info.count < 0)
+        return virtDBusUtilSetLastVirtError(error);
+
+    g_variant_builder_init(&builder, G_VARIANT_TYPE("a(uab)"));
+
+    for (gint i = 0; i < info.count; i++) {
+        g_variant_builder_open(&builder, G_VARIANT_TYPE("(uab)"));
+        g_variant_builder_add(&builder, "u", info.info[i]->iothread_id);
+
+        g_variant_builder_open(&builder, G_VARIANT_TYPE("ab"));
+        for (gint j = 0; j < info.info[i]->cpumaplen; j++)
+            g_variant_builder_add(&builder, "b", info.info[i]->cpumap[j]);
+        g_variant_builder_close(&builder);
+        g_variant_builder_close(&builder);
+    }
+    gret = g_variant_builder_end(&builder);
+
+    *outArgs = g_variant_new_tuple(&gret, 1);
+}
+
 static void
 virtDBusDomainGetJobInfo(GVariant *inArgs G_GNUC_UNUSED,
                          GUnixFDList *inFDs G_GNUC_UNUSED,
@@ -2457,6 +2519,7 @@ static virtDBusGDBusMethodTable virtDBusDomainMethodTable[] = {
     { "GetGuestVcpus", virtDBusDomainGetGuestVcpus },
     { "GetHostname", virtDBusDomainGetHostname },
     { "GetInterfaceParameters", virtDBusDomainGetInterfaceParameters },
+    { "GetIOThreadInfo", virtDBusDomainGetIOThreadInfo },
     { "GetJobInfo", virtDBusDomainGetJobInfo },
     { "GetJobStats", virtDBusDomainGetJobStats },
     { "GetMemoryParameters", virtDBusDomainGetMemoryParameters },
-- 
2.15.0

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Re: [libvirt] [dbus PATCH v2] Implement GetIOThreadInfo method for Domain Interface

Posted by Pavel Hrdina 7 years ago

On Wed, Apr 25, 2018 at 07:04:25PM +0200, Katerina Koukiou wrote:
> Signed-off-by: Katerina Koukiou <kkoukiou@redhat.com>
> ---
>  data/org.libvirt.Domain.xml |  6 +++++
>  src/domain.c                | 63 +++++++++++++++++++++++++++++++++++++++++++++
>  2 files changed, 69 insertions(+)
> 
> diff --git a/data/org.libvirt.Domain.xml b/data/org.libvirt.Domain.xml
> index 96b9220..531cdb5 100644
> --- a/data/org.libvirt.Domain.xml
> +++ b/data/org.libvirt.Domain.xml
> @@ -222,6 +222,12 @@
>        <arg name="flags" type="u" direction="in"/>
>        <arg name="interfaceParameters" type="a{sv}" direction="out"/>
>      </method>
> +    <method name="GetIOThreadInfo">
> +      <annotation name="org.gtk.GDBus.DocString"
> +        value="See https://libvirt.org/html/libvirt-libvirt-domain.html#virDomainGetIOThreadInfo"/>
> +      <arg name="flags" type="u" direction="in"/>
> +      <arg name="ioThreadInfo" type="a(uab)" direction="out"/>
> +    </method>
>      <method name="GetJobInfo">
>        <annotation name="org.gtk.GDBus.DocString"
>          value="See https://libvirt.org/html/libvirt-libvirt-domain.html#virDomainGetJobInfo"/>
> diff --git a/src/domain.c b/src/domain.c
> index 76eec1d..e7b4b24 100644
> --- a/src/domain.c
> +++ b/src/domain.c
> @@ -85,6 +85,25 @@ virtDBusDomainFSInfoListClear(virtDBusDomainFSInfoList *info)
>  G_DEFINE_AUTO_CLEANUP_CLEAR_FUNC(virtDBusDomainFSInfoList,
>                                   virtDBusDomainFSInfoListClear);
>  
> +struct _virtDBusDomainIOThreadInfoList {
> +    virDomainIOThreadInfoPtr *info;
> +    gint count;
> +};
> +
> +typedef struct _virtDBusDomainIOThreadInfoList virtDBusDomainIOThreadInfoList;
> +
> +static void
> +virtDBusDomainIOThreadInfoListClear(virtDBusDomainIOThreadInfoList *info)
> +{
> +    for (gint i = 0; i < info->count; i++)
> +        virDomainIOThreadInfoFree(info->info[i]);
> +
> +    g_free(info->info);
> +}
> +
> +G_DEFINE_AUTO_CLEANUP_CLEAR_FUNC(virtDBusDomainIOThreadInfoList,
> +                                 virtDBusDomainIOThreadInfoListClear);
> +
>  static GVariant *
>  virtDBusDomainMemoryStatsToGVariant(virDomainMemoryStatPtr stats,
>                                      gint nr_stats)
> @@ -1218,6 +1237,49 @@ virtDBusDomainGetInterfaceParameters(GVariant *inArgs,
>      *outArgs = g_variant_new_tuple(&grecords, 1);
>  }
>  
> +static void
> +virtDBusDomainGetIOThreadInfo(GVariant *inArgs,
> +                              GUnixFDList *inFDs G_GNUC_UNUSED,
> +                              const gchar *objectPath,
> +                              gpointer userData,
> +                              GVariant **outArgs,
> +                              GUnixFDList **outFDs G_GNUC_UNUSED,
> +                              GError **error)
> +{
> +    virtDBusConnect *connect = userData;
> +    g_autoptr(virDomain) domain = NULL;
> +    g_auto(virtDBusDomainIOThreadInfoList) info = { 0 };
> +    GVariantBuilder builder;
> +    guint flags;
> +    GVariant *gret;
> +
> +    g_variant_get(inArgs, "(u)", &flags);
> +
> +    domain = virtDBusDomainGetVirDomain(connect, objectPath, error);
> +    if (!domain)
> +        return;
> +
> +    info.count = virDomainGetIOThreadInfo(domain, &info.info, flags);
> +    if (info.count < 0)
> +        return virtDBusUtilSetLastVirtError(error);
> +
> +    g_variant_builder_init(&builder, G_VARIANT_TYPE("a(uab)"));
> +
> +    for (gint i = 0; i < info.count; i++) {
> +        g_variant_builder_open(&builder, G_VARIANT_TYPE("(uab)"));
> +        g_variant_builder_add(&builder, "u", info.info[i]->iothread_id);
> +
> +        g_variant_builder_open(&builder, G_VARIANT_TYPE("ab"));
> +        for (gint j = 0; j < info.info[i]->cpumaplen; j++)
> +            g_variant_builder_add(&builder, "b", info.info[i]->cpumap[j]);

Unfortunately it's not that easy :).  The cpumap is unsigned char type
which means it's 8-bit long and each bit represents single CPU.

First we need to get number of host CPUs calling:

    ncpus = virNodeGetCPUMap(connect->connection, NULL, NULL, 0);

And then loop over all CPUs and check whether it's set or not using
VIR_CPU_USED macro.

Pavel
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