[libvirt] [PATCH 07/53] vircgroup: introduce virCgroupV2DetectPlacement
If the placement was copied from parent or set to absolute path
there is nothing to do, otherwise set the placement based on
process placement from /proc/self/cgroup or /proc/{pid}/cgroup.
Signed-off-by: Pavel Hrdina <phrdina(a)redhat.com>
---
src/util/vircgroupv2.c | 26 ++++++++++++++++++++++++++
1 file changed, 26 insertions(+)
diff --git a/src/util/vircgroupv2.c b/src/util/vircgroupv2.c
index eaf07397d5..ed94d5da17 100644
--- a/src/util/vircgroupv2.c
+++ b/src/util/vircgroupv2.c
@@ -182,6 +182,31 @@ virCgroupV2DetectMounts(virCgroupPtr group,
}
+static int
+virCgroupV2DetectPlacement(virCgroupPtr group,
+ const char *path,
+ const char *controllers ATTRIBUTE_UNUSED,
+ const char *selfpath)
+{
+ if (group->unified.placement)
+ return 0;
+
+ /*
+ * selfpath == "/" + path="" -> "/"
+ * selfpath == "/libvirt.service" + path == "" ->
"/libvirt.service"
+ * selfpath == "/libvirt.service" + path == "foo" ->
"/libvirt.service/foo"
+ */
+ if (virAsprintf(&group->unified.placement,
+ "%s%s%s", selfpath,
+ (STREQ(selfpath, "/") ||
+ STREQ(path, "") ? "" : "/"),
+ path) < 0)
+ return -1;
+
+ return 0;
+}
+
+
virCgroupBackend virCgroupV2Backend = {
.type = VIR_CGROUP_BACKEND_TYPE_V2,
@@ -190,6 +215,7 @@ virCgroupBackend virCgroupV2Backend = {
.copyMounts = virCgroupV2CopyMounts,
.copyPlacement = virCgroupV2CopyPlacement,
.detectMounts = virCgroupV2DetectMounts,
+ .detectPlacement = virCgroupV2DetectPlacement,
};
--
2.17.1