2018-08-17 08:19:59 +00:00
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/*
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* vircgroupv1.c: methods for cgroups v1 backend
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*
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* Copyright (C) 2010-2015,2018 Red Hat, Inc.
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* Copyright IBM Corp. 2008
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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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#include <config.h>
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2018-09-13 14:27:56 +00:00
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#if defined HAVE_MNTENT_H && defined HAVE_GETMNTENT_R
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# include <mntent.h>
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#endif
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2018-08-17 08:19:59 +00:00
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#include "internal.h"
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#define __VIR_CGROUP_ALLOW_INCLUDE_PRIV_H__
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#include "vircgrouppriv.h"
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#undef __VIR_CGROUP_ALLOW_INCLUDE_PRIV_H__
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#include "vircgroup.h"
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#include "vircgroupbackend.h"
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#include "vircgroupv1.h"
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2018-09-13 14:27:56 +00:00
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#include "virfile.h"
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2018-08-17 08:19:59 +00:00
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#include "virlog.h"
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VIR_LOG_INIT("util.cgroup");
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#define VIR_FROM_THIS VIR_FROM_CGROUP
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VIR_ENUM_DECL(virCgroupV1Controller);
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VIR_ENUM_IMPL(virCgroupV1Controller, VIR_CGROUP_CONTROLLER_LAST,
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"cpu", "cpuacct", "cpuset", "memory", "devices",
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"freezer", "blkio", "net_cls", "perf_event",
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"name=systemd");
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2018-09-13 14:27:56 +00:00
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/* We're looking for at least one 'cgroup' fs mount,
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* which is *not* a named mount. */
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static bool
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virCgroupV1Available(void)
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{
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bool ret = false;
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FILE *mounts = NULL;
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struct mntent entry;
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char buf[CGROUP_MAX_VAL];
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if (!virFileExists("/proc/cgroups"))
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return false;
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if (!(mounts = fopen("/proc/mounts", "r")))
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return false;
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while (getmntent_r(mounts, &entry, buf, sizeof(buf)) != NULL) {
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if (STREQ(entry.mnt_type, "cgroup") && !strstr(entry.mnt_opts, "name=")) {
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ret = true;
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break;
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}
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}
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VIR_FORCE_FCLOSE(mounts);
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return ret;
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}
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2018-08-17 08:19:59 +00:00
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virCgroupBackend virCgroupV1Backend = {
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.type = VIR_CGROUP_BACKEND_TYPE_V1,
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2018-09-13 14:27:56 +00:00
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.available = virCgroupV1Available,
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2018-08-17 08:19:59 +00:00
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};
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void
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virCgroupV1Register(void)
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{
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virCgroupBackendRegister(&virCgroupV1Backend);
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}
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