1 /* 2 * Copyright (c) 2018, 2019, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package jdk.internal.platform.cgroupv1; 27 28 import jdk.internal.platform.CgroupSubsystemController; 29 import jdk.internal.platform.Metrics; 30 31 public class CgroupV1SubsystemController implements CgroupSubsystemController { 32 33 // Values returned larger than this number are unlimited. 34 static long UNLIMITED_MIN = 0x7FFFFFFFFF000000L; 35 String root; 36 String mountPoint; 37 String path; 38 39 public CgroupV1SubsystemController(String root, String mountPoint) { 40 this.root = root; 41 this.mountPoint = mountPoint; 42 } 43 44 public void setPath(String cgroupPath) { 45 if (root != null && cgroupPath != null) { 46 if (root.equals("/")) { 47 if (!cgroupPath.equals("/")) { 48 path = mountPoint + cgroupPath; 49 } 50 else { 51 path = mountPoint; 52 } 53 } 54 else { 55 if (root.equals(cgroupPath)) { 56 path = mountPoint; 57 } 58 else { 59 if (cgroupPath.startsWith(root)) { 60 if (cgroupPath.length() > root.length()) { 61 String cgroupSubstr = cgroupPath.substring(root.length()); 62 path = mountPoint + cgroupSubstr; 63 } 64 } 65 } 66 } 67 } 68 } 69 70 @Override 71 public String path() { 72 return path; 73 } 74 75 public static long convertStringToLong(String strval) { 76 return CgroupSubsystemController.convertStringToLong(strval, Long.MAX_VALUE); 77 } 78 79 public static long longValOrUnlimited(long value) { 80 return value > UNLIMITED_MIN ? Metrics.LONG_RETVAL_UNLIMITED : value; 81 } 82 }