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From a756729403915485dbd3cbdf4f252806318c227c Mon Sep 17 00:00:00 2001
Message-Id: <a756729403915485dbd3cbdf4f252806318c227c@dist-git>
From: Pavel Hrdina <phrdina@redhat.com>
Date: Mon, 1 Jul 2019 17:06:37 +0200
Subject: [PATCH] vircgroup: extract virCgroupV1AddTask
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Reviewed-by: Fabiano Fidêncio <fidencio@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
(cherry picked from commit 064024e70afd6ad08993444b3839eb3ba67426f2)
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1689297
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Message-Id: <558f1a90ce9b0fc5a9688c5a44bf85dd523c37e5.1561993100.git.phrdina@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
---
src/util/vircgroup.c | 56 ++++---------------------------------
src/util/vircgroupbackend.h | 20 +++++++++++++
src/util/vircgrouppriv.h | 5 ++++
src/util/vircgroupv1.c | 31 ++++++++++++++++++++
4 files changed, 62 insertions(+), 50 deletions(-)
diff --git a/src/util/vircgroup.c b/src/util/vircgroup.c
index 33d34d6eda..a5076cb554 100644
--- a/src/util/vircgroup.c
+++ b/src/util/vircgroup.c
@@ -544,7 +544,7 @@ virCgroupSetValueU64(virCgroupPtr group,
}
-static int
+int
virCgroupSetValueI64(virCgroupPtr group,
int controller,
const char *key,
@@ -672,50 +672,6 @@ virCgroupNew(pid_t pid,
}
-typedef enum {
- /* Adds a whole process with all threads to specific cgroup except
- * to systemd named controller. */
- VIR_CGROUP_TASK_PROCESS = 1 << 0,
-
- /* Same as VIR_CGROUP_TASK_PROCESS but it also adds the task to systemd
- * named controller. */
- VIR_CGROUP_TASK_SYSTEMD = 1 << 1,
-
- /* Moves only specific thread into cgroup except to systemd
- * named controller. */
- VIR_CGROUP_TASK_THREAD = 1 << 2,
-} virCgroupTaskFlags;
-
-
-static int
-virCgroupAddTaskInternal(virCgroupPtr group,
- pid_t pid,
- unsigned int flags)
-{
- int ret = -1;
- size_t i;
-
- for (i = 0; i < VIR_CGROUP_CONTROLLER_LAST; i++) {
- /* Skip over controllers not mounted */
- if (!group->controllers[i].mountPoint)
- continue;
-
- /* We must never add tasks in systemd's hierarchy
- * unless we're intentionally trying to move a
- * task into a systemd machine scope */
- if (i == VIR_CGROUP_CONTROLLER_SYSTEMD &&
- !(flags & VIR_CGROUP_TASK_SYSTEMD))
- continue;
-
- if (virCgroupSetValueI64(group, i, "tasks", pid) < 0)
- goto cleanup;
- }
-
- ret = 0;
- cleanup:
- return ret;
-}
-
/**
* virCgroupAddProcess:
*
@@ -730,7 +686,7 @@ virCgroupAddTaskInternal(virCgroupPtr group,
int
virCgroupAddProcess(virCgroupPtr group, pid_t pid)
{
- return virCgroupAddTaskInternal(group, pid, VIR_CGROUP_TASK_PROCESS);
+ return group->backend->addTask(group, pid, VIR_CGROUP_TASK_PROCESS);
}
/**
@@ -747,9 +703,9 @@ virCgroupAddProcess(virCgroupPtr group, pid_t pid)
int
virCgroupAddMachineProcess(virCgroupPtr group, pid_t pid)
{
- return virCgroupAddTaskInternal(group, pid,
- VIR_CGROUP_TASK_PROCESS |
- VIR_CGROUP_TASK_SYSTEMD);
+ return group->backend->addTask(group, pid,
+ VIR_CGROUP_TASK_PROCESS |
+ VIR_CGROUP_TASK_SYSTEMD);
}
/**
@@ -767,7 +723,7 @@ int
virCgroupAddThread(virCgroupPtr group,
pid_t pid)
{
- return virCgroupAddTaskInternal(group, pid, VIR_CGROUP_TASK_THREAD);
+ return group->backend->addTask(group, pid, VIR_CGROUP_TASK_THREAD);
}
diff --git a/src/util/vircgroupbackend.h b/src/util/vircgroupbackend.h
index 1f28c51c49..bff1f8938e 100644
--- a/src/util/vircgroupbackend.h
+++ b/src/util/vircgroupbackend.h
@@ -35,6 +35,20 @@ typedef enum {
*/
} virCgroupBackendFlags;
+typedef enum {
+ /* Adds a whole process with all threads to specific cgroup except
+ * to systemd named controller. */
+ VIR_CGROUP_TASK_PROCESS = 1 << 0,
+
+ /* Same as VIR_CGROUP_TASK_PROCESS but it also adds the task to systemd
+ * named controller. */
+ VIR_CGROUP_TASK_SYSTEMD = 1 << 1,
+
+ /* Moves only specific thread into cgroup except to systemd
+ * named controller. */
+ VIR_CGROUP_TASK_THREAD = 1 << 2,
+} virCgroupBackendTaskFlags;
+
typedef enum {
VIR_CGROUP_BACKEND_TYPE_V1 = 0,
VIR_CGROUP_BACKEND_TYPE_LAST,
@@ -103,6 +117,11 @@ typedef int
typedef int
(*virCgroupRemoveCB)(virCgroupPtr group);
+typedef int
+(*virCgroupAddTaskCB)(virCgroupPtr group,
+ pid_t pid,
+ unsigned int flags);
+
struct _virCgroupBackend {
virCgroupBackendType type;
@@ -121,6 +140,7 @@ struct _virCgroupBackend {
virCgroupPathOfControllerCB pathOfController;
virCgroupMakeGroupCB makeGroup;
virCgroupRemoveCB remove;
+ virCgroupAddTaskCB addTask;
};
typedef struct _virCgroupBackend virCgroupBackend;
typedef virCgroupBackend *virCgroupBackendPtr;
diff --git a/src/util/vircgrouppriv.h b/src/util/vircgrouppriv.h
index a760b9bcfd..01714370be 100644
--- a/src/util/vircgrouppriv.h
+++ b/src/util/vircgrouppriv.h
@@ -73,6 +73,11 @@ int virCgroupGetValueU64(virCgroupPtr group,
const char *key,
unsigned long long int *value);
+int virCgroupSetValueI64(virCgroupPtr group,
+ int controller,
+ const char *key,
+ long long int value);
+
int virCgroupPartitionEscape(char **path);
int virCgroupNewPartition(const char *path,
diff --git a/src/util/vircgroupv1.c b/src/util/vircgroupv1.c
index 4d4b51094a..fda2c43eef 100644
--- a/src/util/vircgroupv1.c
+++ b/src/util/vircgroupv1.c
@@ -706,6 +706,36 @@ virCgroupV1Remove(virCgroupPtr group)
}
+static int
+virCgroupV1AddTask(virCgroupPtr group,
+ pid_t pid,
+ unsigned int flags)
+{
+ int ret = -1;
+ size_t i;
+
+ for (i = 0; i < VIR_CGROUP_CONTROLLER_LAST; i++) {
+ /* Skip over controllers not mounted */
+ if (!group->controllers[i].mountPoint)
+ continue;
+
+ /* We must never add tasks in systemd's hierarchy
+ * unless we're intentionally trying to move a
+ * task into a systemd machine scope */
+ if (i == VIR_CGROUP_CONTROLLER_SYSTEMD &&
+ !(flags & VIR_CGROUP_TASK_SYSTEMD))
+ continue;
+
+ if (virCgroupSetValueI64(group, i, "tasks", pid) < 0)
+ goto cleanup;
+ }
+
+ ret = 0;
+ cleanup:
+ return ret;
+}
+
+
virCgroupBackend virCgroupV1Backend = {
.type = VIR_CGROUP_BACKEND_TYPE_V1,
@@ -723,6 +753,7 @@ virCgroupBackend virCgroupV1Backend = {
.pathOfController = virCgroupV1PathOfController,
.makeGroup = virCgroupV1MakeGroup,
.remove = virCgroupV1Remove,
+ .addTask = virCgroupV1AddTask,
};
--
2.22.0
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