[PATCH] libxl: Fix domxml-to-native conversion

Jim Fehlig via Devel posted 1 patch 1 year, 9 months ago
Patches applied successfully (tree, apply log)
git fetch https://github.com/patchew-project/libvirt tags/patchew/20240429212911.21779-1-jfehlig@suse.com
src/libxl/libxl_driver.c |  4 ++--
src/libxl/xen_common.c   | 25 +++++++++++++++----------
src/libxl/xen_common.h   |  1 -
src/libxl/xen_xl.c       |  4 ++--
src/libxl/xen_xl.h       |  2 +-
src/libxl/xen_xm.c       |  5 ++---
src/libxl/xen_xm.h       |  2 +-
tests/xlconfigtest.c     |  7 +------
tests/xmconfigtest.c     |  7 +------
9 files changed, 25 insertions(+), 32 deletions(-)
[PATCH] libxl: Fix domxml-to-native conversion
Posted by Jim Fehlig via Devel 1 year, 9 months ago
Similar to commit 57d084febe, another case of the libxl driver not
adapting to modular daemons. When converting configuration that
contains a type='network' interface, the converter calls
virNetworkLookupByName, passing the hypervisor connection object
instead of a connection to virtnetworkd. E.g.

> cat dom.xml
...
    <interface type='network'>
      <source network='default'/>
    </interface>
...
> virsh net-info default
Name:           default
UUID:           25a5b089-1e71-4956-99aa-df2213bbb407
Active:         yes
Persistent:     no
Autostart:      no
Bridge:         virbr0
> virsh domxml-to-native xen-xl dom.xml
error: Network not found: default

Acquire a connection to virtnetworkd and use it when calling
virNetwork* APIs.

Signed-off-by: Jim Fehlig <jfehlig@suse.com>
---
 src/libxl/libxl_driver.c |  4 ++--
 src/libxl/xen_common.c   | 25 +++++++++++++++----------
 src/libxl/xen_common.h   |  1 -
 src/libxl/xen_xl.c       |  4 ++--
 src/libxl/xen_xl.h       |  2 +-
 src/libxl/xen_xm.c       |  5 ++---
 src/libxl/xen_xm.h       |  2 +-
 tests/xlconfigtest.c     |  7 +------
 tests/xmconfigtest.c     |  7 +------
 9 files changed, 25 insertions(+), 32 deletions(-)

diff --git a/src/libxl/libxl_driver.c b/src/libxl/libxl_driver.c
index e42a3dc0a9..4d5eb920bf 100644
--- a/src/libxl/libxl_driver.c
+++ b/src/libxl/libxl_driver.c
@@ -2709,10 +2709,10 @@ libxlConnectDomainXMLToNative(virConnectPtr conn, const char * nativeFormat,
         goto cleanup;
 
     if (STREQ(nativeFormat, XEN_CONFIG_FORMAT_XL)) {
-        if (!(conf = xenFormatXL(def, conn)))
+        if (!(conf = xenFormatXL(def)))
             goto cleanup;
     } else if (STREQ(nativeFormat, XEN_CONFIG_FORMAT_XM)) {
-        if (!(conf = xenFormatXM(conn, def)))
+        if (!(conf = xenFormatXM(def)))
             goto cleanup;
     } else {
 
diff --git a/src/libxl/xen_common.c b/src/libxl/xen_common.c
index 79eb593432..0b2346d8b5 100644
--- a/src/libxl/xen_common.c
+++ b/src/libxl/xen_common.c
@@ -24,6 +24,7 @@
 
 #include <config.h>
 
+#include "driver.h"
 #include "internal.h"
 #include "virerror.h"
 #include "virconf.h"
@@ -1586,8 +1587,7 @@ xenMakeIPList(virNetDevIPInfo *guestIP)
 }
 
 static int
-xenFormatNet(virConnectPtr conn,
-             virConfValue *list,
+xenFormatNet(virConfValue *list,
              virDomainNetDef *net,
              int hvm,
              const char *vif_typename)
@@ -1649,13 +1649,21 @@ xenFormatNet(virConnectPtr conn,
 
     case VIR_DOMAIN_NET_TYPE_NETWORK:
     {
-        virNetworkPtr network = virNetworkLookupByName(conn, net->data.network.name);
+        virConnectPtr conn = NULL;
+        virNetworkPtr network;
         char *bridge;
-        if (!network) {
+
+        if (!(conn = virGetConnectNetwork()))
+            return -1;
+
+        if (!(network = virNetworkLookupByName(conn, net->data.network.name))) {
             virReportError(VIR_ERR_NO_NETWORK, "%s",
                            net->data.network.name);
+            virObjectUnref(conn);
             return -1;
         }
+        virObjectUnref(conn);
+
         bridge = virNetworkGetBridgeName(network);
         virObjectUnref(network);
         if (!bridge) {
@@ -2304,7 +2312,6 @@ xenFormatSound(virConf *conf, virDomainDef *def)
 
 static int
 xenFormatVif(virConf *conf,
-             virConnectPtr conn,
              virDomainDef *def,
              const char *vif_typename)
 {
@@ -2317,8 +2324,7 @@ xenFormatVif(virConf *conf,
     netVal->list = NULL;
 
     for (i = 0; i < def->nnets; i++) {
-        if (xenFormatNet(conn, netVal, def->nets[i],
-                         hvm, vif_typename) < 0)
+        if (xenFormatNet(netVal, def->nets[i], hvm, vif_typename) < 0)
             return -1;
     }
 
@@ -2336,7 +2342,6 @@ xenFormatVif(virConf *conf,
 int
 xenFormatConfigCommon(virConf *conf,
                       virDomainDef *def,
-                      virConnectPtr conn,
                       const char *nativeFormat)
 {
     if (xenFormatGeneralMeta(conf, def) < 0)
@@ -2364,10 +2369,10 @@ xenFormatConfigCommon(virConf *conf,
         return -1;
 
     if (STREQ(nativeFormat, XEN_CONFIG_FORMAT_XL)) {
-        if (xenFormatVif(conf, conn, def, "vif") < 0)
+        if (xenFormatVif(conf, def, "vif") < 0)
             return -1;
     } else if (STREQ(nativeFormat, XEN_CONFIG_FORMAT_XM)) {
-        if (xenFormatVif(conf, conn, def, "netfront") < 0)
+        if (xenFormatVif(conf, def, "netfront") < 0)
             return -1;
     } else {
         virReportError(VIR_ERR_INVALID_ARG,
diff --git a/src/libxl/xen_common.h b/src/libxl/xen_common.h
index b21046e959..95408fa896 100644
--- a/src/libxl/xen_common.h
+++ b/src/libxl/xen_common.h
@@ -61,7 +61,6 @@ int xenParseConfigCommon(virConf *conf,
 
 int xenFormatConfigCommon(virConf *conf,
                           virDomainDef *def,
-                          virConnectPtr conn,
                           const char *nativeFormat);
 
 char *xenMakeIPList(virNetDevIPInfo *guestIP);
diff --git a/src/libxl/xen_xl.c b/src/libxl/xen_xl.c
index f175359307..53f6871efc 100644
--- a/src/libxl/xen_xl.c
+++ b/src/libxl/xen_xl.c
@@ -2041,14 +2041,14 @@ xenFormatXLDomainNamespaceData(virConf *conf, virDomainDef *def)
 }
 
 virConf *
-xenFormatXL(virDomainDef *def, virConnectPtr conn)
+xenFormatXL(virDomainDef *def)
 {
     g_autoptr(virConf) conf = NULL;
 
     if (!(conf = virConfNew()))
         return NULL;
 
-    if (xenFormatConfigCommon(conf, def, conn, XEN_CONFIG_FORMAT_XL) < 0)
+    if (xenFormatConfigCommon(conf, def, XEN_CONFIG_FORMAT_XL) < 0)
         return NULL;
 
     if (xenFormatXLOS(conf, def) < 0)
diff --git a/src/libxl/xen_xl.h b/src/libxl/xen_xl.h
index f8b1ebfde9..028b359b76 100644
--- a/src/libxl/xen_xl.h
+++ b/src/libxl/xen_xl.h
@@ -29,6 +29,6 @@ virDomainDef *xenParseXL(virConf *conn,
                            virCaps *caps,
                            virDomainXMLOption *xmlopt);
 
-virConf *xenFormatXL(virDomainDef *def, virConnectPtr);
+virConf *xenFormatXL(virDomainDef *def);
 
 const char *xenTranslateCPUFeature(const char *feature_name, bool from_libxl);
diff --git a/src/libxl/xen_xm.c b/src/libxl/xen_xm.c
index 5705a5ec0c..274b35153b 100644
--- a/src/libxl/xen_xm.c
+++ b/src/libxl/xen_xm.c
@@ -543,15 +543,14 @@ G_STATIC_ASSERT(MAX_VIRT_CPUS <= sizeof(1UL) * CHAR_BIT);
  * Convert a virDomainDef object into an XM config record.
  */
 virConf *
-xenFormatXM(virConnectPtr conn,
-            virDomainDef *def)
+xenFormatXM(virDomainDef *def)
 {
     g_autoptr(virConf) conf = NULL;
 
     if (!(conf = virConfNew()))
         return NULL;
 
-    if (xenFormatConfigCommon(conf, def, conn, XEN_CONFIG_FORMAT_XM) < 0)
+    if (xenFormatConfigCommon(conf, def, XEN_CONFIG_FORMAT_XM) < 0)
         return NULL;
 
     if (xenFormatXMOS(conf, def) < 0)
diff --git a/src/libxl/xen_xm.h b/src/libxl/xen_xm.h
index afb4f51ff7..db2ae52581 100644
--- a/src/libxl/xen_xm.h
+++ b/src/libxl/xen_xm.h
@@ -26,7 +26,7 @@
 #include "virconf.h"
 #include "domain_conf.h"
 
-virConf *xenFormatXM(virConnectPtr conn, virDomainDef *def);
+virConf *xenFormatXM(virDomainDef *def);
 
 virDomainDef *xenParseXM(virConf *conf,
                            virCaps *caps, virDomainXMLOption *xmlopt);
diff --git a/tests/xlconfigtest.c b/tests/xlconfigtest.c
index 962a1f2c4b..00b6a355eb 100644
--- a/tests/xlconfigtest.c
+++ b/tests/xlconfigtest.c
@@ -65,17 +65,12 @@ testCompareParseXML(const char *xlcfg, const char *xml, bool replaceVars)
 {
     g_autofree char *gotxlcfgData = NULL;
     g_autoptr(virConf) conf = NULL;
-    g_autoptr(virConnect) conn = NULL;
     int wrote = 4096;
     g_autoptr(virDomainDef) def = NULL;
     g_autofree char *replacedXML = NULL;
 
     gotxlcfgData = g_new0(char, wrote);
 
-    conn = virGetConnect();
-    if (!conn)
-        return -1;
-
     if (replaceVars) {
         if (!(replacedXML = testReplaceVarsXML(xml)))
             return -1;
@@ -93,7 +88,7 @@ testCompareParseXML(const char *xlcfg, const char *xml, bool replaceVars)
         return -1;
     }
 
-    if (!(conf = xenFormatXL(def, conn)))
+    if (!(conf = xenFormatXL(def)))
         return -1;
 
     if (virConfWriteMem(gotxlcfgData, &wrote, conf) < 0)
diff --git a/tests/xmconfigtest.c b/tests/xmconfigtest.c
index dbf9f7a4c7..30ad49f8b1 100644
--- a/tests/xmconfigtest.c
+++ b/tests/xmconfigtest.c
@@ -39,16 +39,11 @@ testCompareParseXML(const char *xmcfg, const char *xml)
 {
     g_autofree char *gotxmcfgData = NULL;
     g_autoptr(virConf) conf = NULL;
-    g_autoptr(virConnect) conn = NULL;
     int wrote = 4096;
     g_autoptr(virDomainDef) def = NULL;
 
     gotxmcfgData = g_new0(char, wrote);
 
-    conn = virGetConnect();
-    if (!conn)
-        return -1;
-
     if (!(def = virDomainDefParseFile(xml, driver->xmlopt, NULL,
                                       VIR_DOMAIN_DEF_PARSE_INACTIVE)))
         return -1;
@@ -58,7 +53,7 @@ testCompareParseXML(const char *xmcfg, const char *xml)
         return -1;
     }
 
-    if (!(conf = xenFormatXM(conn, def)))
+    if (!(conf = xenFormatXM(def)))
         return -1;
 
     if (virConfWriteMem(gotxmcfgData, &wrote, conf) < 0)
-- 
2.44.0
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Re: [PATCH] libxl: Fix domxml-to-native conversion
Posted by Ján Tomko 1 year, 9 months ago
On a Monday in 2024, Jim Fehlig via Devel wrote:
>Similar to commit 57d084febe, another case of the libxl driver not
>adapting to modular daemons. When converting configuration that
>contains a type='network' interface, the converter calls
>virNetworkLookupByName, passing the hypervisor connection object
>instead of a connection to virtnetworkd. E.g.
>
>> cat dom.xml
>...
>    <interface type='network'>
>      <source network='default'/>
>    </interface>
>...
>> virsh net-info default
>Name:           default
>UUID:           25a5b089-1e71-4956-99aa-df2213bbb407
>Active:         yes
>Persistent:     no
>Autostart:      no
>Bridge:         virbr0
>> virsh domxml-to-native xen-xl dom.xml
>error: Network not found: default
>
>Acquire a connection to virtnetworkd and use it when calling
>virNetwork* APIs.
>
>Signed-off-by: Jim Fehlig <jfehlig@suse.com>
>---
> src/libxl/libxl_driver.c |  4 ++--
> src/libxl/xen_common.c   | 25 +++++++++++++++----------
> src/libxl/xen_common.h   |  1 -
> src/libxl/xen_xl.c       |  4 ++--
> src/libxl/xen_xl.h       |  2 +-
> src/libxl/xen_xm.c       |  5 ++---
> src/libxl/xen_xm.h       |  2 +-
> tests/xlconfigtest.c     |  7 +------
> tests/xmconfigtest.c     |  7 +------
> 9 files changed, 25 insertions(+), 32 deletions(-)
>
>diff --git a/src/libxl/xen_common.c b/src/libxl/xen_common.c
>index 79eb593432..0b2346d8b5 100644
>--- a/src/libxl/xen_common.c
>+++ b/src/libxl/xen_common.c
>@@ -24,6 +24,7 @@
>
> #include <config.h>
>
>+#include "driver.h"
> #include "internal.h"
> #include "virerror.h"
> #include "virconf.h"
>@@ -1586,8 +1587,7 @@ xenMakeIPList(virNetDevIPInfo *guestIP)
> }
>
> static int
>-xenFormatNet(virConnectPtr conn,
>-             virConfValue *list,
>+xenFormatNet(virConfValue *list,
>              virDomainNetDef *net,
>              int hvm,
>              const char *vif_typename)
>@@ -1649,13 +1649,21 @@ xenFormatNet(virConnectPtr conn,
>
>     case VIR_DOMAIN_NET_TYPE_NETWORK:
>     {
>-        virNetworkPtr network = virNetworkLookupByName(conn, net->data.network.name);
>+        virConnectPtr conn = NULL;

You can use:

g_autoptr(virConnect) conn = NULL;

to avoid adding the unref on both branches.

Regardless of that:
Reviewed-by: Ján Tomko <jtomko@redhat.com>

Jano

>+        virNetworkPtr network;
>         char *bridge;
>-        if (!network) {
>+
>+        if (!(conn = virGetConnectNetwork()))
>+            return -1;
>+
>+        if (!(network = virNetworkLookupByName(conn, net->data.network.name))) {
>             virReportError(VIR_ERR_NO_NETWORK, "%s",
>                            net->data.network.name);
>+            virObjectUnref(conn);
>             return -1;
>         }
>+        virObjectUnref(conn);
>+
>         bridge = virNetworkGetBridgeName(network);
>         virObjectUnref(network);
>         if (!bridge) {
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Re: [PATCH] libxl: Fix domxml-to-native conversion
Posted by Jim Fehlig via Devel 1 year, 9 months ago
On 5/2/24 5:24 AM, Ján Tomko wrote:
> On a Monday in 2024, Jim Fehlig via Devel wrote:
>> Similar to commit 57d084febe, another case of the libxl driver not
>> adapting to modular daemons. When converting configuration that
>> contains a type='network' interface, the converter calls
>> virNetworkLookupByName, passing the hypervisor connection object
>> instead of a connection to virtnetworkd. E.g.
>>
>>> cat dom.xml
>> ...
>>    <interface type='network'>
>>      <source network='default'/>
>>    </interface>
>> ...
>>> virsh net-info default
>> Name:           default
>> UUID:           25a5b089-1e71-4956-99aa-df2213bbb407
>> Active:         yes
>> Persistent:     no
>> Autostart:      no
>> Bridge:         virbr0
>>> virsh domxml-to-native xen-xl dom.xml
>> error: Network not found: default
>>
>> Acquire a connection to virtnetworkd and use it when calling
>> virNetwork* APIs.
>>
>> Signed-off-by: Jim Fehlig <jfehlig@suse.com>
>> ---
>> src/libxl/libxl_driver.c |  4 ++--
>> src/libxl/xen_common.c   | 25 +++++++++++++++----------
>> src/libxl/xen_common.h   |  1 -
>> src/libxl/xen_xl.c       |  4 ++--
>> src/libxl/xen_xl.h       |  2 +-
>> src/libxl/xen_xm.c       |  5 ++---
>> src/libxl/xen_xm.h       |  2 +-
>> tests/xlconfigtest.c     |  7 +------
>> tests/xmconfigtest.c     |  7 +------
>> 9 files changed, 25 insertions(+), 32 deletions(-)
>>
>> diff --git a/src/libxl/xen_common.c b/src/libxl/xen_common.c
>> index 79eb593432..0b2346d8b5 100644
>> --- a/src/libxl/xen_common.c
>> +++ b/src/libxl/xen_common.c
>> @@ -24,6 +24,7 @@
>>
>> #include <config.h>
>>
>> +#include "driver.h"
>> #include "internal.h"
>> #include "virerror.h"
>> #include "virconf.h"
>> @@ -1586,8 +1587,7 @@ xenMakeIPList(virNetDevIPInfo *guestIP)
>> }
>>
>> static int
>> -xenFormatNet(virConnectPtr conn,
>> -             virConfValue *list,
>> +xenFormatNet(virConfValue *list,
>>              virDomainNetDef *net,
>>              int hvm,
>>              const char *vif_typename)
>> @@ -1649,13 +1649,21 @@ xenFormatNet(virConnectPtr conn,
>>
>>     case VIR_DOMAIN_NET_TYPE_NETWORK:
>>     {
>> -        virNetworkPtr network = virNetworkLookupByName(conn, 
>> net->data.network.name);
>> +        virConnectPtr conn = NULL;
> 
> You can use:
> 
> g_autoptr(virConnect) conn = NULL;
> 
> to avoid adding the unref on both branches.

Ah right, thanks for the reminder. I squashed in the below diff before pushing.

Regards,
Jim

diff --git a/src/libxl/xen_common.c b/src/libxl/xen_common.c
index 0b2346d8b5..3a64f565f7 100644
--- a/src/libxl/xen_common.c
+++ b/src/libxl/xen_common.c
@@ -24,6 +24,7 @@

  #include <config.h>

+#include "datatypes.h"
  #include "driver.h"
  #include "internal.h"
  #include "virerror.h"
@@ -1649,7 +1650,7 @@ xenFormatNet(virConfValue *list,

      case VIR_DOMAIN_NET_TYPE_NETWORK:
      {
-        virConnectPtr conn = NULL;
+        g_autoptr(virConnect) conn = NULL;
          virNetworkPtr network;
          char *bridge;

@@ -1659,10 +1660,8 @@ xenFormatNet(virConfValue *list,
          if (!(network = virNetworkLookupByName(conn, net->data.network.name))) {
              virReportError(VIR_ERR_NO_NETWORK, "%s",
                             net->data.network.name);
-            virObjectUnref(conn);
              return -1;
          }
-        virObjectUnref(conn);

          bridge = virNetworkGetBridgeName(network);
          virObjectUnref(network);
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