295 lines
16 KiB
Java
295 lines
16 KiB
Java
/*
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* Copyright (c) 2020, Red Hat Inc.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test CgroupSubsystemFactory
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* @requires os.family == "linux"
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* @library /testlibrary /test/lib
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* @build sun.hotspot.WhiteBox
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* @run driver ClassFileInstaller sun.hotspot.WhiteBox
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* @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI CgroupSubsystemFactory
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*/
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import java.io.IOException;
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import java.nio.charset.StandardCharsets;
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import java.nio.file.Files;
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import java.nio.file.Path;
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import java.nio.file.Paths;
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import jdk.test.lib.Asserts;
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import jdk.test.lib.Utils;
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import jdk.test.lib.util.FileUtils;
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import sun.hotspot.WhiteBox;
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/*
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* Verify hotspot's detection heuristics of CgroupSubsystemFactory::create()
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*/
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public class CgroupSubsystemFactory {
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// Mirrored from src/hotspot/os/linux/cgroupSubsystem_linux.hpp
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private static final int CGROUPS_V1 = 1;
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private static final int CGROUPS_V2 = 2;
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private static final int INVALID_CGROUPS_V2 = 3;
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private static final int INVALID_CGROUPS_V1 = 4;
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private static final int INVALID_CGROUPS_NO_MOUNT = 5;
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private Path existingDirectory;
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private Path cgroupv1CgInfoZeroHierarchy;
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private Path cgroupv1MntInfoZeroHierarchy;
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private Path cgroupv2CgInfoZeroHierarchy;
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private Path cgroupv2MntInfoZeroHierarchy;
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private Path cgroupv1CgInfoNonZeroHierarchy;
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private Path cgroupv1MntInfoNonZeroHierarchyOtherOrder;
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private Path cgroupv1MntInfoNonZeroHierarchy;
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private Path cgroupv1MntInfoDoubleCpuset;
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private Path cgroupv1MntInfoDoubleCpuset2;
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private Path cgroupv1MntInfoSystemdOnly;
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private String mntInfoEmpty = "";
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private Path cgroupV1SelfCgroup;
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private Path cgroupV2SelfCgroup;
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private Path cgroupV2MntInfoMissingCgroupv2;
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private Path cgroupv1MntInfoMissingMemoryController;
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private String procSelfCgroupHybridContent = "11:hugetlb:/\n" +
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"10:devices:/user.slice\n" +
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"9:pids:/user.slice/user-15263.slice/user@15263.service\n" +
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"8:cpu,cpuacct:/\n" +
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"7:perf_event:/\n" +
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"6:freezer:/\n" +
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"5:blkio:/\n" +
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"4:net_cls,net_prio:/\n" +
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"3:cpuset:/\n" +
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"2:memory:/user.slice/user-15263.slice/user@15263.service\n" +
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"1:name=systemd:/user.slice/user-15263.slice/user@15263.service/gnome-terminal-server.service\n" +
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"0::/user.slice/user-15263.slice/user@15263.service/gnome-terminal-server.service";
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private String procSelfCgroupV2UnifiedContent = "0::/user.slice/user-1000.slice/session-3.scope";
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private String cgroupsZeroHierarchy =
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"#subsys_name hierarchy num_cgroups enabled\n" +
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"cpuset 0 1 1\n" +
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"cpu 0 1 1\n" +
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"cpuacct 0 1 1\n" +
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"memory 0 1 1\n" +
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"devices 0 1 1\n" +
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"freezer 0 1 1\n" +
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"net_cls 0 1 1\n" +
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"blkio 0 1 1\n" +
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"perf_event 0 1 1 ";
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private String cgroupV2LineHybrid = "31 30 0:27 / /sys/fs/cgroup/unified rw,nosuid,nodev,noexec,relatime shared:5 - cgroup2 none rw,seclabel,nsdelegate\n";
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private String cgroupv1MountInfoLineMemory = "35 30 0:31 / /sys/fs/cgroup/memory rw,nosuid,nodev,noexec,relatime shared:7 - cgroup none rw,seclabel,memory\n";
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private String mntInfoHybridStub =
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"30 23 0:26 / /sys/fs/cgroup ro,nosuid,nodev,noexec shared:4 - tmpfs tmpfs ro,seclabel,mode=755\n" +
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"32 30 0:28 / /sys/fs/cgroup/systemd rw,nosuid,nodev,noexec,relatime shared:6 - cgroup none rw,seclabel,xattr,name=systemd\n" +
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"36 30 0:32 / /sys/fs/cgroup/pids rw,nosuid,nodev,noexec,relatime shared:8 - cgroup none rw,seclabel,pids\n" +
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"37 30 0:33 / /sys/fs/cgroup/perf_event rw,nosuid,nodev,noexec,relatime shared:9 - cgroup none rw,seclabel,perf_event\n" +
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"38 30 0:34 / /sys/fs/cgroup/net_cls,net_prio rw,nosuid,nodev,noexec,relatime shared:10 - cgroup none rw,seclabel,net_cls,net_prio\n" +
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"39 30 0:35 / /sys/fs/cgroup/hugetlb rw,nosuid,nodev,noexec,relatime shared:11 - cgroup none rw,seclabel,hugetlb\n" +
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"40 30 0:36 / /sys/fs/cgroup/cpu,cpuacct rw,nosuid,nodev,noexec,relatime shared:12 - cgroup none rw,seclabel,cpu,cpuacct\n" +
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"41 30 0:37 / /sys/fs/cgroup/devices rw,nosuid,nodev,noexec,relatime shared:13 - cgroup none rw,seclabel,devices\n" +
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"42 30 0:38 / /sys/fs/cgroup/cpuset rw,nosuid,nodev,noexec,relatime shared:14 - cgroup none rw,seclabel,cpuset\n" +
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"43 30 0:39 / /sys/fs/cgroup/blkio rw,nosuid,nodev,noexec,relatime shared:15 - cgroup none rw,seclabel,blkio\n" +
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"44 30 0:40 / /sys/fs/cgroup/freezer rw,nosuid,nodev,noexec,relatime shared:16 - cgroup none rw,seclabel,freezer\n";
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private String mntInfoHybridRest = cgroupv1MountInfoLineMemory + mntInfoHybridStub;
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private String mntInfoHybridMissingMemory = mntInfoHybridStub;
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private String mntInfoHybrid = cgroupV2LineHybrid + mntInfoHybridRest;
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private String mntInfoHybridFlippedOrder = mntInfoHybridRest + cgroupV2LineHybrid;
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private String mntInfoCgroupv1MoreCpusetLine = "121 32 0:37 / /cpusets rw,relatime shared:69 - cgroup none rw,cpuset\n";
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private String mntInfoCgroupv1DoubleCpuset = mntInfoCgroupv1MoreCpusetLine + mntInfoHybrid;
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private String mntInfoCgroupv1DoubleCpuset2 = mntInfoHybrid + mntInfoCgroupv1MoreCpusetLine;
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private String cgroupsNonZeroHierarchy =
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"#subsys_name hierarchy num_cgroups enabled\n" +
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"cpuset 3 1 1\n" +
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"cpu 8 1 1\n" +
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"cpuacct 8 1 1\n" +
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"blkio 10 1 1\n" +
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"memory 2 90 1\n" +
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"devices 8 74 1\n" +
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"freezer 11 1 1\n" +
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"net_cls 5 1 1\n" +
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"perf_event 4 1 1\n" +
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"net_prio 5 1 1\n" +
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"hugetlb 6 1 1\n" +
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"pids 3 80 1";
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private String mntInfoCgroupsV2Only =
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"28 21 0:25 / /sys/fs/cgroup rw,nosuid,nodev,noexec,relatime shared:4 - cgroup2 none rw,seclabel,nsdelegate";
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private String mntInfoCgroupsV1SystemdOnly =
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"35 26 0:26 / /sys/fs/cgroup/systemd rw,nosuid,nodev,noexec,relatime - cgroup systemd rw,name=systemd\n" +
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"26 18 0:19 / /sys/fs/cgroup rw,relatime - tmpfs none rw,size=4k,mode=755\n";
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private void setup() {
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try {
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existingDirectory = Utils.createTempDirectory(CgroupSubsystemFactory.class.getSimpleName());
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Path cgroupsZero = Paths.get(existingDirectory.toString(), "cgroups_zero");
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Files.writeString(cgroupsZero, cgroupsZeroHierarchy, StandardCharsets.UTF_8);
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cgroupv1CgInfoZeroHierarchy = cgroupsZero;
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cgroupv2CgInfoZeroHierarchy = cgroupsZero;
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cgroupv1MntInfoZeroHierarchy = Paths.get(existingDirectory.toString(), "mountinfo_empty");
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Files.writeString(cgroupv1MntInfoZeroHierarchy, mntInfoEmpty);
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cgroupv2MntInfoZeroHierarchy = Paths.get(existingDirectory.toString(), "mountinfo_cgroupv2");
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Files.writeString(cgroupv2MntInfoZeroHierarchy, mntInfoCgroupsV2Only);
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cgroupv1CgInfoNonZeroHierarchy = Paths.get(existingDirectory.toString(), "cgroups_non_zero");
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Files.writeString(cgroupv1CgInfoNonZeroHierarchy, cgroupsNonZeroHierarchy);
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cgroupv1MntInfoNonZeroHierarchy = Paths.get(existingDirectory.toString(), "mountinfo_non_zero");
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Files.writeString(cgroupv1MntInfoNonZeroHierarchy, mntInfoHybrid);
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cgroupv1MntInfoNonZeroHierarchyOtherOrder = Paths.get(existingDirectory.toString(), "mountinfo_non_zero_cgroupv2_last");
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Files.writeString(cgroupv1MntInfoNonZeroHierarchyOtherOrder, mntInfoHybridFlippedOrder);
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cgroupV1SelfCgroup = Paths.get(existingDirectory.toString(), "cgroup_self_hybrid");
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Files.writeString(cgroupV1SelfCgroup, procSelfCgroupHybridContent);
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cgroupV2SelfCgroup = Paths.get(existingDirectory.toString(), "cgroup_self_v2");
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Files.writeString(cgroupV2SelfCgroup, procSelfCgroupV2UnifiedContent);
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cgroupv1MntInfoMissingMemoryController = Paths.get(existingDirectory.toString(), "mnt_info_missing_memory");
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Files.writeString(cgroupv1MntInfoMissingMemoryController, mntInfoHybridMissingMemory);
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cgroupV2MntInfoMissingCgroupv2 = Paths.get(existingDirectory.toString(), "mnt_info_missing_cgroup2");
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Files.writeString(cgroupV2MntInfoMissingCgroupv2, mntInfoHybridStub);
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cgroupv1MntInfoDoubleCpuset = Paths.get(existingDirectory.toString(), "mnt_info_cgroupv1_double_cpuset");
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Files.writeString(cgroupv1MntInfoDoubleCpuset, mntInfoCgroupv1DoubleCpuset);
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cgroupv1MntInfoDoubleCpuset2 = Paths.get(existingDirectory.toString(), "mnt_info_cgroupv1_double_cpuset2");
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Files.writeString(cgroupv1MntInfoDoubleCpuset2, mntInfoCgroupv1DoubleCpuset2);
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cgroupv1MntInfoSystemdOnly = Paths.get(existingDirectory.toString(), "mnt_info_cgroupv1_systemd_only");
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Files.writeString(cgroupv1MntInfoSystemdOnly, mntInfoCgroupsV1SystemdOnly);
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} catch (IOException e) {
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throw new RuntimeException(e);
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}
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}
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private void teardown() {
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try {
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FileUtils.deleteFileTreeWithRetry(existingDirectory);
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} catch (IOException e) {
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System.err.println("Teardown failed. " + e.getMessage());
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}
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}
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private boolean isValidCgroup(int value) {
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return value == CGROUPS_V1 || value == CGROUPS_V2;
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}
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public void testCgroupv1MultipleCpusetMounts(WhiteBox wb, Path mountInfo) {
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String procCgroups = cgroupv1CgInfoNonZeroHierarchy.toString();
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String procSelfCgroup = cgroupV1SelfCgroup.toString();
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String procSelfMountinfo = mountInfo.toString();
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int retval = wb.validateCgroup(procCgroups, procSelfCgroup, procSelfMountinfo);
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Asserts.assertEQ(CGROUPS_V1, retval, "Multiple cpuset controllers, but only one in /sys/fs/cgroup");
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Asserts.assertTrue(isValidCgroup(retval));
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System.out.println("testCgroupv1MultipleCpusetMounts PASSED!");
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}
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public void testCgroupv1SystemdOnly(WhiteBox wb) {
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String procCgroups = cgroupv1CgInfoZeroHierarchy.toString();
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String procSelfCgroup = cgroupV1SelfCgroup.toString();
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String procSelfMountinfo = cgroupv1MntInfoSystemdOnly.toString();
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int retval = wb.validateCgroup(procCgroups, procSelfCgroup, procSelfMountinfo);
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Asserts.assertEQ(INVALID_CGROUPS_NO_MOUNT, retval, "Only systemd mounted. Invalid");
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Asserts.assertFalse(isValidCgroup(retval));
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System.out.println("testCgroupv1SystemdOnly PASSED!");
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}
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public void testCgroupv1NoMounts(WhiteBox wb) {
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String procCgroups = cgroupv1CgInfoZeroHierarchy.toString();
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String procSelfCgroup = cgroupV1SelfCgroup.toString();
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String procSelfMountinfo = cgroupv1MntInfoZeroHierarchy.toString();
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int retval = wb.validateCgroup(procCgroups, procSelfCgroup, procSelfMountinfo);
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Asserts.assertEQ(INVALID_CGROUPS_NO_MOUNT, retval, "No cgroups mounted in /proc/self/mountinfo. Invalid.");
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Asserts.assertFalse(isValidCgroup(retval));
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System.out.println("testCgroupv1NoMounts PASSED!");
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}
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public void testCgroupv2NoCgroup2Fs(WhiteBox wb) {
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String procCgroups = cgroupv2CgInfoZeroHierarchy.toString();
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String procSelfCgroup = cgroupV2SelfCgroup.toString();
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String procSelfMountinfo = cgroupV2MntInfoMissingCgroupv2.toString();
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int retval = wb.validateCgroup(procCgroups, procSelfCgroup, procSelfMountinfo);
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Asserts.assertEQ(INVALID_CGROUPS_V2, retval, "No cgroup2 filesystem in /proc/self/mountinfo. Invalid.");
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Asserts.assertFalse(isValidCgroup(retval));
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System.out.println("testCgroupv2NoCgroup2Fs PASSED!");
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}
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public void testCgroupv1MissingMemoryController(WhiteBox wb) {
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String procCgroups = cgroupv1CgInfoNonZeroHierarchy.toString();
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String procSelfCgroup = cgroupV1SelfCgroup.toString();
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String procSelfMountinfo = cgroupv1MntInfoMissingMemoryController.toString();
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int retval = wb.validateCgroup(procCgroups, procSelfCgroup, procSelfMountinfo);
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Asserts.assertEQ(INVALID_CGROUPS_V1, retval, "Required memory controller path missing in mountinfo. Invalid.");
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Asserts.assertFalse(isValidCgroup(retval));
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System.out.println("testCgroupv1MissingMemoryController PASSED!");
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}
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public void testCgroupv2(WhiteBox wb) {
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String procCgroups = cgroupv2CgInfoZeroHierarchy.toString();
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String procSelfCgroup = cgroupV2SelfCgroup.toString();
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String procSelfMountinfo = cgroupv2MntInfoZeroHierarchy.toString();
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int retval = wb.validateCgroup(procCgroups, procSelfCgroup, procSelfMountinfo);
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Asserts.assertEQ(CGROUPS_V2, retval, "Expected");
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Asserts.assertTrue(isValidCgroup(retval));
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System.out.println("testCgroupv2 PASSED!");
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}
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public void testCgroupV1Hybrid(WhiteBox wb) {
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String procCgroups = cgroupv1CgInfoNonZeroHierarchy.toString();
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String procSelfCgroup = cgroupV1SelfCgroup.toString();
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String procSelfMountinfo = cgroupv1MntInfoNonZeroHierarchy.toString();
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int retval = wb.validateCgroup(procCgroups, procSelfCgroup, procSelfMountinfo);
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Asserts.assertEQ(CGROUPS_V1, retval, "Hybrid cgroups expected as cgroups v1");
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Asserts.assertTrue(isValidCgroup(retval));
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System.out.println("testCgroupv1Hybrid PASSED!");
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}
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public void testCgroupV1HybridMntInfoOrder(WhiteBox wb) {
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String procCgroups = cgroupv1CgInfoNonZeroHierarchy.toString();
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String procSelfCgroup = cgroupV1SelfCgroup.toString();
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String procSelfMountinfo = cgroupv1MntInfoNonZeroHierarchyOtherOrder.toString();
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int retval = wb.validateCgroup(procCgroups, procSelfCgroup, procSelfMountinfo);
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Asserts.assertEQ(CGROUPS_V1, retval, "Hybrid cgroups expected as cgroups v1");
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Asserts.assertTrue(isValidCgroup(retval));
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System.out.println("testCgroupv1HybridMntInfoOrder PASSED!");
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}
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public static void main(String[] args) throws Exception {
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WhiteBox wb = WhiteBox.getWhiteBox();
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CgroupSubsystemFactory test = new CgroupSubsystemFactory();
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test.setup();
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try {
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test.testCgroupv1SystemdOnly(wb);
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test.testCgroupv1NoMounts(wb);
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test.testCgroupv2(wb);
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test.testCgroupV1Hybrid(wb);
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test.testCgroupV1HybridMntInfoOrder(wb);
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test.testCgroupv1MissingMemoryController(wb);
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test.testCgroupv2NoCgroup2Fs(wb);
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test.testCgroupv1MultipleCpusetMounts(wb, test.cgroupv1MntInfoDoubleCpuset);
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test.testCgroupv1MultipleCpusetMounts(wb, test.cgroupv1MntInfoDoubleCpuset2);
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} finally {
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test.teardown();
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}
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}
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}
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