vircgroup: extract virCgroupV1CopyPlacement

Reviewed-by: Fabiano Fidêncio <fidencio@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>

src/util/vircgroup.c

@@ -265,42 +265,6 @@ virCgroupDetectMounts(virCgroupPtr group)
 }
 
 
-static int
-virCgroupCopyPlacement(virCgroupPtr group,
-                       const char *path,
-                       virCgroupPtr parent)
-{
-    size_t i;
-    for (i = 0; i < VIR_CGROUP_CONTROLLER_LAST; i++) {
-        if (!group->controllers[i].mountPoint)
-            continue;
-
-        if (i == VIR_CGROUP_CONTROLLER_SYSTEMD)
-            continue;
-
-        if (path[0] == '/') {
-            if (VIR_STRDUP(group->controllers[i].placement, path) < 0)
-                return -1;
-        } else {
-            /*
-             * parent == "/" + path="" => "/"
-             * parent == "/libvirt.service" + path == "" => "/libvirt.service"
-             * parent == "/libvirt.service" + path == "foo" => "/libvirt.service/foo"
-             */
-            if (virAsprintf(&group->controllers[i].placement,
-                            "%s%s%s",
-                            parent->controllers[i].placement,
-                            (STREQ(parent->controllers[i].placement, "/") ||
-                             STREQ(path, "") ? "" : "/"),
-                            path) < 0)
-                return -1;
-        }
-    }
-
-    return 0;
-}
-
-
 /*
  * virCgroupDetectPlacement:
  * @group: the group to process
@@ -528,7 +492,7 @@ virCgroupDetect(virCgroupPtr group,
      * based on the parent cgroup...
      */
     if ((parent || path[0] == '/') &&
-        virCgroupCopyPlacement(group, path, parent) < 0)
+        group->backend->copyPlacement(group, path, parent) < 0)
         return -1;
 
     /* ... but use /proc/cgroups to fill in the rest */

src/util/vircgroupbackend.h

@@ -45,6 +45,11 @@ typedef int
 (*virCgroupCopyMountsCB)(virCgroupPtr group,
                          virCgroupPtr parent);
 
+typedef int
+(*virCgroupCopyPlacementCB)(virCgroupPtr group,
+                            const char *path,
+                            virCgroupPtr parent);
+
 typedef int
 (*virCgroupDetectMountsCB)(virCgroupPtr group,
                            const char *mntType,
@@ -64,6 +69,7 @@ struct _virCgroupBackend {
     virCgroupAvailableCB available;
     virCgroupValidateMachineGroupCB validateMachineGroup;
     virCgroupCopyMountsCB copyMounts;
+    virCgroupCopyPlacementCB copyPlacement;
     virCgroupDetectMountsCB detectMounts;
     virCgroupDetectPlacementCB detectPlacement;
 };

src/util/vircgroupv1.c

@@ -182,6 +182,42 @@ virCgroupV1CopyMounts(virCgroupPtr group,
 }
 
 
+static int
+virCgroupV1CopyPlacement(virCgroupPtr group,
+                         const char *path,
+                         virCgroupPtr parent)
+{
+    size_t i;
+    for (i = 0; i < VIR_CGROUP_CONTROLLER_LAST; i++) {
+        if (!group->controllers[i].mountPoint)
+            continue;
+
+        if (i == VIR_CGROUP_CONTROLLER_SYSTEMD)
+            continue;
+
+        if (path[0] == '/') {
+            if (VIR_STRDUP(group->controllers[i].placement, path) < 0)
+                return -1;
+        } else {
+            /*
+             * parent == "/" + path="" => "/"
+             * parent == "/libvirt.service" + path == "" => "/libvirt.service"
+             * parent == "/libvirt.service" + path == "foo" => "/libvirt.service/foo"
+             */
+            if (virAsprintf(&group->controllers[i].placement,
+                            "%s%s%s",
+                            parent->controllers[i].placement,
+                            (STREQ(parent->controllers[i].placement, "/") ||
+                             STREQ(path, "") ? "" : "/"),
+                            path) < 0)
+                return -1;
+        }
+    }
+
+    return 0;
+}
+
+
 static int
 virCgroupV1ResolveMountLink(const char *mntDir,
                             const char *typeStr,
@@ -342,6 +378,7 @@ virCgroupBackend virCgroupV1Backend = {
     .available = virCgroupV1Available,
     .validateMachineGroup = virCgroupV1ValidateMachineGroup,
     .copyMounts = virCgroupV1CopyMounts,
+    .copyPlacement = virCgroupV1CopyPlacement,
     .detectMounts = virCgroupV1DetectMounts,
     .detectPlacement = virCgroupV1DetectPlacement,
 };