| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package com.alibaba.jstorm.container.cgroup.core; |
| |
| import java.io.IOException; |
| import java.util.List; |
| |
| import com.alibaba.jstorm.container.CgroupUtils; |
| import com.alibaba.jstorm.container.Constants; |
| import com.alibaba.jstorm.container.SubSystemType; |
| import com.alibaba.jstorm.container.cgroup.Device; |
| |
| public class DevicesCore implements CgroupCore { |
| |
| private final String dir; |
| |
| public static final String DEVICES_ALLOW = "/devices.allow"; |
| public static final String DEVICES_DENY = "/devices.deny"; |
| public static final String DEVICES_LIST = "/devices.list"; |
| |
| public static final char TYPE_ALL = 'a'; |
| public static final char TYPE_BLOCK = 'b'; |
| public static final char TYPE_CHAR = 'c'; |
| |
| public static final int ACCESS_READ = 1; |
| public static final int ACCESS_WRITE = 2; |
| public static final int ACCESS_CREATE = 4; |
| |
| public static final char ACCESS_READ_CH = 'r'; |
| public static final char ACCESS_WRITE_CH = 'w'; |
| public static final char ACCESS_CREATE_CH = 'm'; |
| |
| public DevicesCore(String dir) { |
| this.dir = dir; |
| } |
| |
| @Override |
| public SubSystemType getType() { |
| // TODO Auto-generated method stub |
| return SubSystemType.devices; |
| } |
| |
| public static class Record { |
| Device device; |
| char type; |
| int accesses; |
| |
| public Record(char type, Device device, int accesses) { |
| this.type = type; |
| this.device = device; |
| this.accesses = accesses; |
| } |
| |
| public Record(String output) { |
| if (output.contains("*")) { |
| System.out.println("Pre:" + output); |
| output = output.replaceAll("\\*", "-1"); |
| System.out.println("After:" + output); |
| } |
| String[] splits = output.split("[: ]"); |
| type = splits[0].charAt(0); |
| int major = Integer.parseInt(splits[1]); |
| int minor = Integer.parseInt(splits[2]); |
| device = new Device(major, minor); |
| accesses = 0; |
| for (char c : splits[3].toCharArray()) { |
| if (c == ACCESS_READ_CH) { |
| accesses |= ACCESS_READ; |
| } |
| if (c == ACCESS_CREATE_CH) { |
| accesses |= ACCESS_CREATE; |
| } |
| if (c == ACCESS_WRITE_CH) { |
| accesses |= ACCESS_WRITE; |
| } |
| } |
| } |
| |
| @Override |
| public String toString() { |
| StringBuilder sb = new StringBuilder(); |
| sb.append(type); |
| sb.append(' '); |
| sb.append(device.major); |
| sb.append(':'); |
| sb.append(device.minor); |
| sb.append(' '); |
| sb.append(getAccessesFlag(accesses)); |
| |
| return sb.toString(); |
| } |
| |
| @Override |
| public int hashCode() { |
| final int prime = 31; |
| int result = 1; |
| result = prime * result + accesses; |
| result = prime * result + ((device == null) ? 0 : device.hashCode()); |
| result = prime * result + type; |
| return result; |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) |
| return true; |
| if (obj == null) |
| return false; |
| if (getClass() != obj.getClass()) |
| return false; |
| Record other = (Record) obj; |
| if (accesses != other.accesses) |
| return false; |
| if (device == null) { |
| if (other.device != null) |
| return false; |
| } else if (!device.equals(other.device)) |
| return false; |
| if (type != other.type) |
| return false; |
| return true; |
| } |
| |
| public static Record[] parseRecordList(List<String> output) { |
| Record[] records = new Record[output.size()]; |
| for (int i = 0, l = output.size(); i < l; i++) { |
| records[i] = new Record(output.get(i)); |
| } |
| |
| return records; |
| } |
| |
| public static StringBuilder getAccessesFlag(int accesses) { |
| StringBuilder sb = new StringBuilder(); |
| if ((accesses & ACCESS_READ) != 0) { |
| sb.append(ACCESS_READ_CH); |
| } |
| if ((accesses & ACCESS_WRITE) != 0) { |
| sb.append(ACCESS_WRITE_CH); |
| } |
| if ((accesses & ACCESS_CREATE) != 0) { |
| sb.append(ACCESS_CREATE_CH); |
| } |
| return sb; |
| } |
| } |
| |
| private void setPermission(String prop, char type, Device device, int accesses) throws IOException { |
| Record record = new Record(type, device, accesses); |
| CgroupUtils.writeFileByLine(Constants.getDir(this.dir, prop), record.toString()); |
| } |
| |
| public void setAllow(char type, Device device, int accesses) throws IOException { |
| setPermission(DEVICES_ALLOW, type, device, accesses); |
| } |
| |
| public void setDeny(char type, Device device, int accesses) throws IOException { |
| setPermission(DEVICES_DENY, type, device, accesses); |
| } |
| |
| public Record[] getList() throws IOException { |
| List<String> output = CgroupUtils.readFileByLine(Constants.getDir(this.dir, DEVICES_LIST)); |
| return Record.parseRecordList(output); |
| } |
| |
| } |