[libvirt PATCH 7/9] vircgroup: introduce virCgroupV1Exists and virCgroupV2Exists
This will check if the cgroup actually exists on the system.
Signed-off-by: Pavel Hrdina <phrdina(a)redhat.com>
---
src/util/vircgroupbackend.h | 4 ++++
src/util/vircgroupv1.c | 27 +++++++++++++++++++++++++++
src/util/vircgroupv2.c | 15 +++++++++++++++
3 files changed, 46 insertions(+)
diff --git a/src/util/vircgroupbackend.h b/src/util/vircgroupbackend.h
index 497dde5625..a338ffb618 100644
--- a/src/util/vircgroupbackend.h
+++ b/src/util/vircgroupbackend.h
@@ -118,6 +118,9 @@ typedef int
const char *key,
char **path);
+typedef bool
+(*virCgroupExistsCB)(virCgroupPtr group);
+
typedef int
(*virCgroupMakeGroupCB)(virCgroupPtr parent,
virCgroupPtr group,
@@ -382,6 +385,7 @@ struct _virCgroupBackend {
virCgroupGetAnyControllerCB getAnyController;
virCgroupPathOfControllerCB pathOfController;
virCgroupMakeGroupCB makeGroup;
+ virCgroupExistsCB exists;
virCgroupRemoveCB remove;
virCgroupAddTaskCB addTask;
virCgroupHasEmptyTasksCB hasEmptyTasks;
diff --git a/src/util/vircgroupv1.c b/src/util/vircgroupv1.c
index 51ada12f6e..8a9a63e0b7 100644
--- a/src/util/vircgroupv1.c
+++ b/src/util/vircgroupv1.c
@@ -690,6 +690,32 @@ virCgroupV1MakeGroup(virCgroupPtr parent,
}
+static bool
+virCgroupV1Exists(virCgroupPtr group)
+{
+ size_t i;
+
+ for (i = 0; i < VIR_CGROUP_CONTROLLER_LAST; i++) {
+ g_autofree char *path = NULL;
+
+ if (i == VIR_CGROUP_CONTROLLER_SYSTEMD)
+ continue;
+
+ if (!group->legacy[i].mountPoint)
+ continue;
+
+ if (virCgroupV1PathOfController(group, i, "", &path) < 0)
+ return false;
+
+ if (!virFileExists(path)) {
+ return false;
+ }
+ }
+
+ return true;
+}
+
+
static int
virCgroupV1Remove(virCgroupPtr group)
{
@@ -2154,6 +2180,7 @@ virCgroupBackend virCgroupV1Backend = {
.getAnyController = virCgroupV1GetAnyController,
.pathOfController = virCgroupV1PathOfController,
.makeGroup = virCgroupV1MakeGroup,
+ .exists = virCgroupV1Exists,
.remove = virCgroupV1Remove,
.addTask = virCgroupV1AddTask,
.hasEmptyTasks = virCgroupV1HasEmptyTasks,
diff --git a/src/util/vircgroupv2.c b/src/util/vircgroupv2.c
index d590f83187..c96f405dfa 100644
--- a/src/util/vircgroupv2.c
+++ b/src/util/vircgroupv2.c
@@ -499,6 +499,20 @@ virCgroupV2MakeGroup(virCgroupPtr parent,
}
+static bool
+virCgroupV2Exists(virCgroupPtr group)
+{
+ g_autofree char *path = NULL;
+ int controller;
+
+ controller = virCgroupV2GetAnyController(group);
+ if (virCgroupV2PathOfController(group, controller, "", &path) < 0)
+ return false;
+
+ return virFileExists(path);
+}
+
+
static int
virCgroupV2Remove(virCgroupPtr group)
{
@@ -1895,6 +1909,7 @@ virCgroupBackend virCgroupV2Backend = {
.getAnyController = virCgroupV2GetAnyController,
.pathOfController = virCgroupV2PathOfController,
.makeGroup = virCgroupV2MakeGroup,
+ .exists = virCgroupV2Exists,
.remove = virCgroupV2Remove,
.addTask = virCgroupV2AddTask,
.hasEmptyTasks = virCgroupV2HasEmptyTasks,
--
2.29.2