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a0815484b1
The VIR_CGROUP_BACKEND_CALL() macro gets a backend for controller and calls corresponding callback in it. If either is NULL then an error message is printed out. However, the error message contains only the intended callback func and not controller or backend found. Signed-off-by: Michal Privoznik <mprivozn@redhat.com> Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
90 lines
2.4 KiB
C
90 lines
2.4 KiB
C
/*
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* vircgroupbackend.c: methods for cgroups backend
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*
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* Copyright (C) 2018 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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#include <config.h>
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#include "vircgroupbackend.h"
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#define LIBVIRT_VIRCGROUPPRIV_H_ALLOW
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#include "vircgrouppriv.h"
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#include "vircgroupv1.h"
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#include "vircgroupv2.h"
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#include "virerror.h"
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#include "virthread.h"
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#define VIR_FROM_THIS VIR_FROM_CGROUP
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VIR_ENUM_IMPL(virCgroupBackend,
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VIR_CGROUP_BACKEND_TYPE_LAST,
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"cgroup V2",
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"cgroup V1",
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);
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static virOnceControl virCgroupBackendOnce = VIR_ONCE_CONTROL_INITIALIZER;
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static virCgroupBackend *virCgroupBackends[VIR_CGROUP_BACKEND_TYPE_LAST] = { 0 };
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void
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virCgroupBackendRegister(virCgroupBackend *backend)
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{
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if (virCgroupBackends[backend->type]) {
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virReportError(VIR_ERR_INTERNAL_ERROR,
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_("Cgroup backend '%s' already registered."),
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virCgroupBackendTypeToString(backend->type));
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return;
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}
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virCgroupBackends[backend->type] = backend;
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}
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static void
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virCgroupBackendOnceInit(void)
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{
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virCgroupV2Register();
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virCgroupV1Register();
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}
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virCgroupBackend **
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virCgroupBackendGetAll(void)
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{
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if (virOnce(&virCgroupBackendOnce, virCgroupBackendOnceInit) < 0) {
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virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
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_("Failed to initialize cgroup backend."));
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return NULL;
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}
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return virCgroupBackends;
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}
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virCgroupBackend *
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virCgroupBackendForController(virCgroup *group,
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unsigned int controller)
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{
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size_t i;
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for (i = 0; i < VIR_CGROUP_BACKEND_TYPE_LAST; i++) {
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if (group->backends[i] &&
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group->backends[i]->hasController(group, controller)) {
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return group->backends[i];
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}
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}
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return NULL;
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}
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