mirror of
https://gitlab.com/libvirt/libvirt.git
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aedd46e7e3
Systemd uses a named cgroup mount for tracking processes. Add it as another type of controller, albeit one which we have to special case in a number of places. In particular we must never create/delete directories there, nor add tasks. Essentially the systemd mount is to be considered read-only for libvirt. With this change both the virCgroupDetectPlacement and virCgroupCopyPlacement methods must be invoked. The copy placement method will copy setup for resource controllers only. The detect placement method will probe for any named controllers, or resource controllers not already setup. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
475 lines
18 KiB
C
475 lines
18 KiB
C
/*
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* Copyright (C) 2013 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <http://www.gnu.org/licenses/>.
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*
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* Author: Daniel P. Berrange <berrange@redhat.com>
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*/
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#include <config.h>
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#include "testutils.h"
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#ifdef __linux__
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# include <stdlib.h>
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# define __VIR_CGROUP_ALLOW_INCLUDE_PRIV_H__
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# include "vircgrouppriv.h"
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# include "virstring.h"
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# include "virerror.h"
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# include "virlog.h"
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# include "virfile.h"
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# define VIR_FROM_THIS VIR_FROM_NONE
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static int validateCgroup(virCgroupPtr cgroup,
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const char *expectPath,
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const char **expectMountPoint,
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const char **expectLinkPoint,
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const char **expectPlacement)
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{
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size_t i;
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if (STRNEQ(cgroup->path, expectPath)) {
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fprintf(stderr, "Wrong path '%s', expected '%s'\n",
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cgroup->path, expectPath);
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return -1;
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}
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for (i = 0; i < VIR_CGROUP_CONTROLLER_LAST; i++) {
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if (STRNEQ_NULLABLE(expectMountPoint[i],
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cgroup->controllers[i].mountPoint)) {
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fprintf(stderr, "Wrong mount '%s', expected '%s' for '%s'\n",
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cgroup->controllers[i].mountPoint,
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expectMountPoint[i],
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virCgroupControllerTypeToString(i));
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return -1;
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}
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if (STRNEQ_NULLABLE(expectLinkPoint[i],
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cgroup->controllers[i].linkPoint)) {
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fprintf(stderr, "Wrong link '%s', expected '%s' for '%s'\n",
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cgroup->controllers[i].linkPoint,
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expectLinkPoint[i],
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virCgroupControllerTypeToString(i));
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return -1;
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}
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if (STRNEQ_NULLABLE(expectPlacement[i],
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cgroup->controllers[i].placement)) {
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fprintf(stderr, "Wrong placement '%s', expected '%s' for '%s'\n",
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cgroup->controllers[i].placement,
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expectPlacement[i],
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virCgroupControllerTypeToString(i));
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return -1;
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}
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}
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return 0;
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}
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const char *mountsSmall[VIR_CGROUP_CONTROLLER_LAST] = {
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[VIR_CGROUP_CONTROLLER_CPU] = "/not/really/sys/fs/cgroup/cpu,cpuacct",
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[VIR_CGROUP_CONTROLLER_CPUACCT] = "/not/really/sys/fs/cgroup/cpu,cpuacct",
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[VIR_CGROUP_CONTROLLER_CPUSET] = NULL,
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[VIR_CGROUP_CONTROLLER_MEMORY] = "/not/really/sys/fs/cgroup/memory",
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[VIR_CGROUP_CONTROLLER_DEVICES] = NULL,
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[VIR_CGROUP_CONTROLLER_FREEZER] = NULL,
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[VIR_CGROUP_CONTROLLER_BLKIO] = NULL,
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[VIR_CGROUP_CONTROLLER_SYSTEMD] = NULL,
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};
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const char *mountsFull[VIR_CGROUP_CONTROLLER_LAST] = {
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[VIR_CGROUP_CONTROLLER_CPU] = "/not/really/sys/fs/cgroup/cpu,cpuacct",
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[VIR_CGROUP_CONTROLLER_CPUACCT] = "/not/really/sys/fs/cgroup/cpu,cpuacct",
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[VIR_CGROUP_CONTROLLER_CPUSET] = "/not/really/sys/fs/cgroup/cpuset",
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[VIR_CGROUP_CONTROLLER_MEMORY] = "/not/really/sys/fs/cgroup/memory",
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[VIR_CGROUP_CONTROLLER_DEVICES] = NULL,
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[VIR_CGROUP_CONTROLLER_FREEZER] = "/not/really/sys/fs/cgroup/freezer",
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[VIR_CGROUP_CONTROLLER_BLKIO] = "/not/really/sys/fs/cgroup/blkio",
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[VIR_CGROUP_CONTROLLER_SYSTEMD] = "/not/really/sys/fs/cgroup/systemd",
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};
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const char *links[VIR_CGROUP_CONTROLLER_LAST] = {
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[VIR_CGROUP_CONTROLLER_CPU] = "/not/really/sys/fs/cgroup/cpu",
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[VIR_CGROUP_CONTROLLER_CPUACCT] = "/not/really/sys/fs/cgroup/cpuacct",
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[VIR_CGROUP_CONTROLLER_CPUSET] = NULL,
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[VIR_CGROUP_CONTROLLER_MEMORY] = NULL,
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[VIR_CGROUP_CONTROLLER_DEVICES] = NULL,
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[VIR_CGROUP_CONTROLLER_FREEZER] = NULL,
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[VIR_CGROUP_CONTROLLER_BLKIO] = NULL,
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};
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static int testCgroupNewForSelf(const void *args ATTRIBUTE_UNUSED)
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{
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virCgroupPtr cgroup = NULL;
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int ret = -1;
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const char *placement[VIR_CGROUP_CONTROLLER_LAST] = {
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[VIR_CGROUP_CONTROLLER_CPU] = "/system",
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[VIR_CGROUP_CONTROLLER_CPUACCT] = "/system",
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[VIR_CGROUP_CONTROLLER_CPUSET] = "/",
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[VIR_CGROUP_CONTROLLER_MEMORY] = "/",
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[VIR_CGROUP_CONTROLLER_DEVICES] = NULL,
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[VIR_CGROUP_CONTROLLER_FREEZER] = "/",
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[VIR_CGROUP_CONTROLLER_BLKIO] = "/",
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[VIR_CGROUP_CONTROLLER_SYSTEMD] = "/user/berrange/123",
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};
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if (virCgroupNewSelf(&cgroup) < 0) {
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fprintf(stderr, "Cannot create cgroup for self\n");
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goto cleanup;
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}
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ret = validateCgroup(cgroup, "", mountsFull, links, placement);
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cleanup:
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virCgroupFree(&cgroup);
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return ret;
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}
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# define ENSURE_ERRNO(en) \
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do { \
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if (!virLastErrorIsSystemErrno(en)) { \
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virErrorPtr err = virGetLastError(); \
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fprintf(stderr, "Did not get " #en " error code: %d:%d\n", \
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err ? err->code : 0, err ? err->int1 : 0); \
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goto cleanup; \
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} } while (0)
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/* Asking for impossible combination since CPU is co-mounted */
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static int testCgroupNewForPartition(const void *args ATTRIBUTE_UNUSED)
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{
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virCgroupPtr cgroup = NULL;
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int ret = -1;
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int rv;
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const char *placementSmall[VIR_CGROUP_CONTROLLER_LAST] = {
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[VIR_CGROUP_CONTROLLER_CPU] = "/virtualmachines.partition",
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[VIR_CGROUP_CONTROLLER_CPUACCT] = "/virtualmachines.partition",
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[VIR_CGROUP_CONTROLLER_CPUSET] = NULL,
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[VIR_CGROUP_CONTROLLER_MEMORY] = "/virtualmachines.partition",
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[VIR_CGROUP_CONTROLLER_DEVICES] = NULL,
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[VIR_CGROUP_CONTROLLER_FREEZER] = NULL,
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[VIR_CGROUP_CONTROLLER_BLKIO] = NULL,
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[VIR_CGROUP_CONTROLLER_SYSTEMD] = NULL,
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};
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const char *placementFull[VIR_CGROUP_CONTROLLER_LAST] = {
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[VIR_CGROUP_CONTROLLER_CPU] = "/virtualmachines.partition",
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[VIR_CGROUP_CONTROLLER_CPUACCT] = "/virtualmachines.partition",
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[VIR_CGROUP_CONTROLLER_CPUSET] = "/virtualmachines.partition",
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[VIR_CGROUP_CONTROLLER_MEMORY] = "/virtualmachines.partition",
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[VIR_CGROUP_CONTROLLER_DEVICES] = NULL,
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[VIR_CGROUP_CONTROLLER_FREEZER] = "/virtualmachines.partition",
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[VIR_CGROUP_CONTROLLER_BLKIO] = "/virtualmachines.partition",
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[VIR_CGROUP_CONTROLLER_SYSTEMD] = "/user/berrange/123",
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};
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if ((rv = virCgroupNewPartition("/virtualmachines", false, -1, &cgroup)) != -1) {
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fprintf(stderr, "Unexpected found /virtualmachines cgroup: %d\n", -rv);
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goto cleanup;
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}
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ENSURE_ERRNO(ENOENT);
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/* Asking for impossible combination since CPU is co-mounted */
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if ((rv = virCgroupNewPartition("/virtualmachines", true,
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(1 << VIR_CGROUP_CONTROLLER_CPU),
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&cgroup)) != -1) {
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fprintf(stderr, "Should not have created /virtualmachines cgroup: %d\n", -rv);
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goto cleanup;
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}
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ENSURE_ERRNO(EINVAL);
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/* Asking for impossible combination since devices is not mounted */
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if ((rv = virCgroupNewPartition("/virtualmachines", true,
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(1 << VIR_CGROUP_CONTROLLER_DEVICES),
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&cgroup)) != -1) {
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fprintf(stderr, "Should not have created /virtualmachines cgroup: %d\n", -rv);
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goto cleanup;
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}
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ENSURE_ERRNO(ENXIO);
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/* Asking for small combination since devices is not mounted */
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if ((rv = virCgroupNewPartition("/virtualmachines", true,
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(1 << VIR_CGROUP_CONTROLLER_CPU) |
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(1 << VIR_CGROUP_CONTROLLER_CPUACCT) |
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(1 << VIR_CGROUP_CONTROLLER_MEMORY),
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&cgroup)) != 0) {
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fprintf(stderr, "Cannot create /virtualmachines cgroup: %d\n", -rv);
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goto cleanup;
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}
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ret = validateCgroup(cgroup, "/virtualmachines.partition", mountsSmall, links, placementSmall);
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virCgroupFree(&cgroup);
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if ((rv = virCgroupNewPartition("/virtualmachines", true, -1, &cgroup)) != 0) {
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fprintf(stderr, "Cannot create /virtualmachines cgroup: %d\n", -rv);
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goto cleanup;
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}
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ret = validateCgroup(cgroup, "/virtualmachines.partition", mountsFull, links, placementFull);
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cleanup:
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virCgroupFree(&cgroup);
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return ret;
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}
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static int testCgroupNewForPartitionNested(const void *args ATTRIBUTE_UNUSED)
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{
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virCgroupPtr cgroup = NULL;
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int ret = -1;
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int rv;
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const char *placementFull[VIR_CGROUP_CONTROLLER_LAST] = {
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[VIR_CGROUP_CONTROLLER_CPU] = "/deployment.partition/production.partition",
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[VIR_CGROUP_CONTROLLER_CPUACCT] = "/deployment.partition/production.partition",
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[VIR_CGROUP_CONTROLLER_CPUSET] = "/deployment.partition/production.partition",
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[VIR_CGROUP_CONTROLLER_MEMORY] = "/deployment.partition/production.partition",
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[VIR_CGROUP_CONTROLLER_DEVICES] = NULL,
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[VIR_CGROUP_CONTROLLER_FREEZER] = "/deployment.partition/production.partition",
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[VIR_CGROUP_CONTROLLER_BLKIO] = "/deployment.partition/production.partition",
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[VIR_CGROUP_CONTROLLER_SYSTEMD] = "/user/berrange/123",
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};
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if ((rv = virCgroupNewPartition("/deployment/production", false, -1, &cgroup)) != -1) {
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fprintf(stderr, "Unexpected found /deployment/production cgroup: %d\n", -rv);
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goto cleanup;
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}
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ENSURE_ERRNO(ENOENT);
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/* Should not work, since we require /deployment to be pre-created */
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if ((rv = virCgroupNewPartition("/deployment/production", true, -1, &cgroup)) != -1) {
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fprintf(stderr, "Unexpected created /deployment/production cgroup: %d\n", -rv);
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goto cleanup;
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}
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ENSURE_ERRNO(ENOENT);
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if ((rv = virCgroupNewPartition("/deployment", true, -1, &cgroup)) != 0) {
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fprintf(stderr, "Failed to create /deployment cgroup: %d\n", -rv);
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goto cleanup;
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}
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/* Should now work */
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if ((rv = virCgroupNewPartition("/deployment/production", true, -1, &cgroup)) != 0) {
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fprintf(stderr, "Failed to create /deployment/production cgroup: %d\n", -rv);
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goto cleanup;
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}
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ret = validateCgroup(cgroup, "/deployment.partition/production.partition",
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mountsFull, links, placementFull);
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cleanup:
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virCgroupFree(&cgroup);
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return ret;
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}
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static int testCgroupNewForPartitionNestedDeep(const void *args ATTRIBUTE_UNUSED)
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{
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virCgroupPtr cgroup = NULL;
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int ret = -1;
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int rv;
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const char *placementFull[VIR_CGROUP_CONTROLLER_LAST] = {
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[VIR_CGROUP_CONTROLLER_CPU] = "/user/berrange.user/production.partition",
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[VIR_CGROUP_CONTROLLER_CPUACCT] = "/user/berrange.user/production.partition",
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[VIR_CGROUP_CONTROLLER_CPUSET] = "/user/berrange.user/production.partition",
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[VIR_CGROUP_CONTROLLER_MEMORY] = "/user/berrange.user/production.partition",
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[VIR_CGROUP_CONTROLLER_DEVICES] = NULL,
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[VIR_CGROUP_CONTROLLER_FREEZER] = "/user/berrange.user/production.partition",
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[VIR_CGROUP_CONTROLLER_BLKIO] = "/user/berrange.user/production.partition",
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[VIR_CGROUP_CONTROLLER_SYSTEMD] = "/user/berrange/123",
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};
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if ((rv = virCgroupNewPartition("/user/berrange.user/production", false, -1, &cgroup)) != -1) {
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fprintf(stderr, "Unexpected found /user/berrange.user/production cgroup: %d\n", -rv);
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goto cleanup;
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}
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ENSURE_ERRNO(ENOENT);
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/* Should not work, since we require /user/berrange.user to be pre-created */
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if ((rv = virCgroupNewPartition("/user/berrange.user/production", true, -1, &cgroup)) != -1) {
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fprintf(stderr, "Unexpected created /user/berrange.user/production cgroup: %d\n", -rv);
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goto cleanup;
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}
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ENSURE_ERRNO(ENOENT);
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if ((rv = virCgroupNewPartition("/user", true, -1, &cgroup)) != 0) {
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fprintf(stderr, "Failed to create /user/berrange.user cgroup: %d\n", -rv);
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goto cleanup;
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}
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if ((rv = virCgroupNewPartition("/user/berrange.user", true, -1, &cgroup)) != 0) {
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fprintf(stderr, "Failed to create /user/berrange.user cgroup: %d\n", -rv);
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goto cleanup;
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}
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/* Should now work */
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if ((rv = virCgroupNewPartition("/user/berrange.user/production", true, -1, &cgroup)) != 0) {
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fprintf(stderr, "Failed to create /user/berrange.user/production cgroup: %d\n", -rv);
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goto cleanup;
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}
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ret = validateCgroup(cgroup, "/user/berrange.user/production.partition",
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mountsFull, links, placementFull);
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cleanup:
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virCgroupFree(&cgroup);
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return ret;
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}
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static int testCgroupNewForPartitionDomain(const void *args ATTRIBUTE_UNUSED)
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{
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virCgroupPtr partitioncgroup = NULL;
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virCgroupPtr domaincgroup = NULL;
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int ret = -1;
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int rv;
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const char *placement[VIR_CGROUP_CONTROLLER_LAST] = {
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[VIR_CGROUP_CONTROLLER_CPU] = "/production.partition/foo.libvirt-lxc",
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[VIR_CGROUP_CONTROLLER_CPUACCT] = "/production.partition/foo.libvirt-lxc",
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[VIR_CGROUP_CONTROLLER_CPUSET] = "/production.partition/foo.libvirt-lxc",
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[VIR_CGROUP_CONTROLLER_MEMORY] = "/production.partition/foo.libvirt-lxc",
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[VIR_CGROUP_CONTROLLER_DEVICES] = NULL,
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[VIR_CGROUP_CONTROLLER_FREEZER] = "/production.partition/foo.libvirt-lxc",
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[VIR_CGROUP_CONTROLLER_BLKIO] = "/production.partition/foo.libvirt-lxc",
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[VIR_CGROUP_CONTROLLER_SYSTEMD] = "/user/berrange/123",
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};
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if ((rv = virCgroupNewPartition("/production", true, -1, &partitioncgroup)) != 0) {
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fprintf(stderr, "Failed to create /production cgroup: %d\n", -rv);
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goto cleanup;
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}
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if ((rv = virCgroupNewDomainPartition(partitioncgroup, "lxc", "foo", true, &domaincgroup)) != 0) {
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fprintf(stderr, "Cannot create LXC cgroup: %d\n", -rv);
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goto cleanup;
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}
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ret = validateCgroup(domaincgroup, "/production.partition/foo.libvirt-lxc", mountsFull, links, placement);
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cleanup:
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virCgroupFree(&partitioncgroup);
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virCgroupFree(&domaincgroup);
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return ret;
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}
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static int testCgroupNewForPartitionDomainEscaped(const void *args ATTRIBUTE_UNUSED)
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{
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virCgroupPtr partitioncgroup1 = NULL;
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virCgroupPtr partitioncgroup2 = NULL;
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virCgroupPtr partitioncgroup3 = NULL;
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virCgroupPtr domaincgroup = NULL;
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int ret = -1;
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int rv;
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const char *placement[VIR_CGROUP_CONTROLLER_LAST] = {
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[VIR_CGROUP_CONTROLLER_CPU] = "/_cgroup.evil/net_cls.evil/__evil.evil/_cpu.foo.libvirt-lxc",
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[VIR_CGROUP_CONTROLLER_CPUACCT] = "/_cgroup.evil/net_cls.evil/__evil.evil/_cpu.foo.libvirt-lxc",
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[VIR_CGROUP_CONTROLLER_CPUSET] = "/_cgroup.evil/net_cls.evil/__evil.evil/_cpu.foo.libvirt-lxc",
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[VIR_CGROUP_CONTROLLER_MEMORY] = "/_cgroup.evil/net_cls.evil/__evil.evil/_cpu.foo.libvirt-lxc",
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[VIR_CGROUP_CONTROLLER_DEVICES] = NULL,
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[VIR_CGROUP_CONTROLLER_FREEZER] = "/_cgroup.evil/net_cls.evil/__evil.evil/_cpu.foo.libvirt-lxc",
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[VIR_CGROUP_CONTROLLER_BLKIO] = "/_cgroup.evil/net_cls.evil/__evil.evil/_cpu.foo.libvirt-lxc",
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[VIR_CGROUP_CONTROLLER_SYSTEMD] = "/user/berrange/123",
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};
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if ((rv = virCgroupNewPartition("/cgroup.evil", true, -1, &partitioncgroup1)) != 0) {
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fprintf(stderr, "Failed to create /cgroup.evil cgroup: %d\n", -rv);
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goto cleanup;
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}
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if ((rv = virCgroupNewPartition("/cgroup.evil/net_cls.evil", true, -1, &partitioncgroup2)) != 0) {
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fprintf(stderr, "Failed to create /cgroup.evil/cpu.evil cgroup: %d\n", -rv);
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goto cleanup;
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}
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if ((rv = virCgroupNewPartition("/cgroup.evil/net_cls.evil/_evil.evil", true, -1, &partitioncgroup3)) != 0) {
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fprintf(stderr, "Failed to create /cgroup.evil cgroup: %d\n", -rv);
|
|
goto cleanup;
|
|
}
|
|
|
|
if ((rv = virCgroupNewDomainPartition(partitioncgroup3, "lxc", "cpu.foo", true, &domaincgroup)) != 0) {
|
|
fprintf(stderr, "Cannot create LXC cgroup: %d\n", -rv);
|
|
goto cleanup;
|
|
}
|
|
|
|
/* NB we're not expecting 'net_cls.evil' to be escaped,
|
|
* since our fake /proc/cgroups pretends this controller
|
|
* isn't compiled into the kernel
|
|
*/
|
|
ret = validateCgroup(domaincgroup, "/_cgroup.evil/net_cls.evil/__evil.evil/_cpu.foo.libvirt-lxc", mountsFull, links, placement);
|
|
|
|
cleanup:
|
|
virCgroupFree(&partitioncgroup3);
|
|
virCgroupFree(&partitioncgroup2);
|
|
virCgroupFree(&partitioncgroup1);
|
|
virCgroupFree(&domaincgroup);
|
|
return ret;
|
|
}
|
|
|
|
# define FAKESYSFSDIRTEMPLATE abs_builddir "/fakesysfsdir-XXXXXX"
|
|
|
|
static int
|
|
mymain(void)
|
|
{
|
|
int ret = 0;
|
|
char *fakesysfsdir;
|
|
|
|
if (VIR_STRDUP_QUIET(fakesysfsdir, FAKESYSFSDIRTEMPLATE) < 0) {
|
|
fprintf(stderr, "Out of memory\n");
|
|
abort();
|
|
}
|
|
|
|
if (!mkdtemp(fakesysfsdir)) {
|
|
fprintf(stderr, "Cannot create fakesysfsdir");
|
|
abort();
|
|
}
|
|
|
|
setenv("LIBVIRT_FAKE_SYSFS_DIR", fakesysfsdir, 1);
|
|
|
|
if (virtTestRun("New cgroup for self", 1, testCgroupNewForSelf, NULL) < 0)
|
|
ret = -1;
|
|
|
|
if (virtTestRun("New cgroup for partition", 1, testCgroupNewForPartition, NULL) < 0)
|
|
ret = -1;
|
|
|
|
if (virtTestRun("New cgroup for partition nested", 1, testCgroupNewForPartitionNested, NULL) < 0)
|
|
ret = -1;
|
|
|
|
if (virtTestRun("New cgroup for partition nested deeply", 1, testCgroupNewForPartitionNestedDeep, NULL) < 0)
|
|
ret = -1;
|
|
|
|
if (virtTestRun("New cgroup for domain partition", 1, testCgroupNewForPartitionDomain, NULL) < 0)
|
|
ret = -1;
|
|
|
|
if (virtTestRun("New cgroup for domain partition escaped", 1, testCgroupNewForPartitionDomainEscaped, NULL) < 0)
|
|
ret = -1;
|
|
|
|
if (getenv("LIBVIRT_SKIP_CLEANUP") == NULL)
|
|
virFileDeleteTree(fakesysfsdir);
|
|
|
|
VIR_FREE(fakesysfsdir);
|
|
|
|
return ret==0 ? EXIT_SUCCESS : EXIT_FAILURE;
|
|
}
|
|
|
|
VIRT_TEST_MAIN_PRELOAD(mymain, abs_builddir "/.libs/vircgroupmock.so")
|
|
|
|
#else
|
|
int
|
|
main(void)
|
|
{
|
|
return EXIT_AM_SKIP;
|
|
}
|
|
#endif
|