[PATCH v2 1/3] interface: introduce downscript

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https://gitlab.com/libvirt/libvirt/-/issues/13

Add support for downscript:

<interface type='ethernet'>
    <mac address='00:11:22:33:44:55'/>
    <script path='/etc/qemu-ifup'/>
    <downscript path='/path/to/my/downscript'/>
</interface>

Signed-off-by: Chen Hanxiao <chen_han_xiao@xxxxxxx>
---
 docs/schemas/domaincommon.rng | 8 ++++++++
 src/conf/domain_conf.c        | 9 +++++++++
 src/conf/domain_conf.h        | 1 +
 3 files changed, 18 insertions(+)

diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng
index 9d60b090f3..6727cd743b 100644
--- a/docs/schemas/domaincommon.rng
+++ b/docs/schemas/domaincommon.rng
@@ -3191,6 +3191,14 @@
           <empty/>
         </element>
       </optional>
+      <optional>
+        <element name="downscript">
+          <attribute name="path">
+            <ref name="filePath"/>
+          </attribute>
+          <empty/>
+        </element>
+      </optional>
       <optional>
         <element name="backenddomain">
           <attribute name="name">
diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index c201fc901d..1406cf079e 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -2520,6 +2520,7 @@ virDomainNetDefClear(virDomainNetDefPtr def)
     VIR_FREE(def->teaming.persistent);
     VIR_FREE(def->virtPortProfile);
     VIR_FREE(def->script);
+    VIR_FREE(def->downscript);
     VIR_FREE(def->domain_name);
     VIR_FREE(def->ifname);
     VIR_FREE(def->ifname_guest);
@@ -11977,6 +11978,7 @@ virDomainNetDefParseXML(virDomainXMLOptionPtr xmlopt,
     g_autofree char *ifname_guest = NULL;
     g_autofree char *ifname_guest_actual = NULL;
     g_autofree char *script = NULL;
+    g_autofree char *downscript = NULL;
     g_autofree char *address = NULL;
     g_autofree char *port = NULL;
     g_autofree char *localaddr = NULL;
@@ -12149,6 +12151,9 @@ virDomainNetDefParseXML(virDomainXMLOptionPtr xmlopt,
             } else if (!script &&
                        virXMLNodeNameEqual(cur, "script")) {
                 script = virXMLPropString(cur, "path");
+            } else if (!downscript &&
+                       virXMLNodeNameEqual(cur, "downscript")) {
+                downscript = virXMLPropString(cur, "path");
             } else if (!domain_name &&
                        virXMLNodeNameEqual(cur, "backenddomain")) {
                 domain_name = virXMLPropString(cur, "name");
@@ -12482,6 +12487,8 @@ virDomainNetDefParseXML(virDomainXMLOptionPtr xmlopt,
 
     if (script != NULL)
         def->script = g_steal_pointer(&script);
+    if (downscript != NULL)
+        def->downscript = g_steal_pointer(&downscript);
     if (domain_name != NULL)
         def->domain_name = g_steal_pointer(&domain_name);
     if (ifname != NULL)
@@ -26567,6 +26574,8 @@ virDomainNetDefFormat(virBufferPtr buf,
 
     virBufferEscapeString(buf, "<script path='%s'/>\n",
                           def->script);
+    virBufferEscapeString(buf, "<downscript path='%s'/>\n",
+                          def->downscript);
     virBufferEscapeString(buf, "<backenddomain name='%s'/>\n", def->domain_name);
 
     if (def->ifname &&
diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
index ddc75d8de2..e152c599ca 100644
--- a/src/conf/domain_conf.h
+++ b/src/conf/domain_conf.h
@@ -1055,6 +1055,7 @@ struct _virDomainNetDef {
         unsigned long sndbuf;
     } tune;
     char *script;
+    char *downscript;
     char *domain_name; /* backend domain name */
     char *ifname; /* interface name on the host (<target dev='x'/>) */
     int managed_tap; /* enum virTristateBool - ABSENT == YES */
-- 
2.23.0




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