| // 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 |
| // 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 org.apache.cloudstack.utils.qemu; |
| |
| import java.util.HashMap; |
| import java.util.Iterator; |
| import java.util.Map; |
| |
| import sun.reflect.generics.reflectiveObjects.NotImplementedException; |
| |
| import com.cloud.storage.Storage; |
| import com.cloud.utils.script.OutputInterpreter; |
| import com.cloud.utils.script.Script; |
| |
| public class QemuImg { |
| |
| /* The qemu-img binary. We expect this to be in $PATH */ |
| public String _qemuImgPath = "qemu-img"; |
| private int timeout; |
| |
| /* Shouldn't we have KVMPhysicalDisk and LibvirtVMDef read this? */ |
| public static enum PhysicalDiskFormat { |
| RAW("raw"), QCOW2("qcow2"), VMDK("vmdk"), FILE("file"), RBD("rbd"), SHEEPDOG("sheepdog"), HTTP("http"), HTTPS("https"), TAR("tar"), DIR("dir"); |
| String format; |
| |
| private PhysicalDiskFormat(final String format) { |
| this.format = format; |
| } |
| |
| @Override |
| public String toString() { |
| return format; |
| } |
| } |
| |
| public static enum PreallocationType { |
| Off("off"), |
| Metadata("metadata"), |
| Full("full"); |
| |
| private final String preallocationType; |
| |
| private PreallocationType(final String preallocationType){ |
| this.preallocationType = preallocationType; |
| } |
| |
| @Override |
| public String toString(){ |
| return preallocationType; |
| } |
| |
| public static PreallocationType getPreallocationType(final Storage.ProvisioningType provisioningType){ |
| switch (provisioningType){ |
| case THIN: |
| return PreallocationType.Off; |
| case SPARSE: |
| return PreallocationType.Metadata; |
| case FAT: |
| return PreallocationType.Full; |
| default: |
| throw new NotImplementedException(); |
| } |
| } |
| } |
| |
| public QemuImg(final int timeout) { |
| this.timeout = timeout; |
| } |
| |
| public void setTimeout(final int timeout) { |
| this.timeout = timeout; |
| } |
| |
| /** |
| * Create a QemuImg object |
| * |
| * |
| * @param qemuImgPath |
| * A alternative path to the qemu-img binary |
| * @return void |
| */ |
| public QemuImg(final String qemuImgPath) { |
| _qemuImgPath = qemuImgPath; |
| } |
| |
| /* These are all methods supported by the qemu-img tool */ |
| |
| /* Perform a consistency check on the disk image */ |
| public void check(final QemuImgFile file) { |
| |
| } |
| |
| /** |
| * Create a new image |
| * |
| * This method calls 'qemu-img create' |
| * |
| * @param file |
| * The file to create |
| * @param backingFile |
| * A backing file if used (for example with qcow2) |
| * @param options |
| * Options for the create. Takes a Map<String, String> with key value |
| * pairs which are passed on to qemu-img without validation. |
| * @return void |
| */ |
| public void create(final QemuImgFile file, final QemuImgFile backingFile, final Map<String, String> options) throws QemuImgException { |
| final Script s = new Script(_qemuImgPath, timeout); |
| s.add("create"); |
| |
| if (options != null && !options.isEmpty()) { |
| s.add("-o"); |
| final StringBuilder optionsStr = new StringBuilder(); |
| final Iterator<Map.Entry<String, String>> optionsIter = options.entrySet().iterator(); |
| while(optionsIter.hasNext()){ |
| final Map.Entry option = optionsIter.next(); |
| optionsStr.append(option.getKey()).append('=').append(option.getValue()); |
| if(optionsIter.hasNext()){ |
| //Add "," only if there are more options |
| optionsStr.append(','); |
| } |
| } |
| s.add(optionsStr.toString()); |
| } |
| |
| /* |
| -b for a backing file does not show up in the docs, but it works. |
| Shouldn't this be -o backing_file=filename instead? |
| */ |
| s.add("-f"); |
| if (backingFile != null) { |
| s.add(backingFile.getFormat().toString()); |
| s.add("-b"); |
| s.add(backingFile.getFileName()); |
| } else { |
| s.add(file.getFormat().toString()); |
| } |
| |
| s.add(file.getFileName()); |
| if (file.getSize() != 0L) { |
| s.add(Long.toString(file.getSize())); |
| } else if (backingFile == null) { |
| throw new QemuImgException("No size was passed, and no backing file was passed"); |
| } |
| |
| final String result = s.execute(); |
| if (result != null) { |
| throw new QemuImgException(result); |
| } |
| } |
| |
| /** |
| * Create a new image |
| * |
| * This method calls 'qemu-img create' |
| * |
| * @param file |
| * The file to create |
| * @return void |
| */ |
| public void create(final QemuImgFile file) throws QemuImgException { |
| this.create(file, null, null); |
| } |
| |
| /** |
| * Create a new image |
| * |
| * This method calls 'qemu-img create' |
| * |
| * @param file |
| * The file to create |
| * @param backingFile |
| * A backing file if used (for example with qcow2) |
| * @return void |
| */ |
| public void create(final QemuImgFile file, final QemuImgFile backingFile) throws QemuImgException { |
| this.create(file, backingFile, null); |
| } |
| |
| /** |
| * Create a new image |
| * |
| * This method calls 'qemu-img create' |
| * |
| * @param file |
| * The file to create |
| * @param options |
| * Options for the create. Takes a Map<String, String> with key value |
| * pairs which are passed on to qemu-img without validation. |
| * @return void |
| */ |
| public void create(final QemuImgFile file, final Map<String, String> options) throws QemuImgException { |
| this.create(file, null, options); |
| } |
| |
| /** |
| * Convert a image from source to destination |
| * |
| * This method calls 'qemu-img convert' and takes two objects |
| * as an argument. |
| * |
| * |
| * @param srcFile |
| * The source file |
| * @param destFile |
| * The destination file |
| * @param options |
| * Options for the convert. Takes a Map<String, String> with key value |
| * pairs which are passed on to qemu-img without validation. |
| * @return void |
| */ |
| public void convert(final QemuImgFile srcFile, final QemuImgFile destFile, final Map<String, String> options) throws QemuImgException { |
| final Script script = new Script(_qemuImgPath, timeout); |
| script.add("convert"); |
| // autodetect source format. Sometime int he future we may teach KVMPhysicalDisk about more formats, then we can explicitly pass them if necessary |
| //s.add("-f"); |
| //s.add(srcFile.getFormat().toString()); |
| script.add("-O"); |
| script.add(destFile.getFormat().toString()); |
| |
| if (options != null && !options.isEmpty()) { |
| script.add("-o"); |
| final StringBuffer optionsBuffer = new StringBuffer(); |
| for (final Map.Entry<String, String> option : options.entrySet()) { |
| optionsBuffer.append(option.getKey()).append('=').append(option.getValue()).append(','); |
| } |
| String optionsStr = optionsBuffer.toString(); |
| optionsStr = optionsStr.replaceAll(",$", ""); |
| script.add(optionsStr); |
| } |
| |
| script.add(srcFile.getFileName()); |
| script.add(destFile.getFileName()); |
| |
| final String result = script.execute(); |
| if (result != null) { |
| throw new QemuImgException(result); |
| } |
| |
| if (srcFile.getSize() < destFile.getSize()) { |
| this.resize(destFile, destFile.getSize()); |
| } |
| } |
| |
| /** |
| * Convert a image from source to destination |
| * |
| * This method calls 'qemu-img convert' and takes two objects |
| * as an argument. |
| * |
| * |
| * @param srcFile |
| * The source file |
| * @param destFile |
| * The destination file |
| * @return void |
| */ |
| public void convert(final QemuImgFile srcFile, final QemuImgFile destFile) throws QemuImgException { |
| this.convert(srcFile, destFile, null); |
| } |
| |
| /** |
| * Commit the changes recorded in the file in its base image. |
| * |
| * This method calls 'qemu-img commit' and takes one object as |
| * an argument |
| * |
| * @param file |
| * The file of which changes have to be committed |
| * @return void |
| */ |
| public void commit(final QemuImgFile file) throws QemuImgException { |
| |
| } |
| |
| /** |
| * Execute qemu-img info for the given file |
| * |
| * Qemu-img returns human readable output, but this method does it's best |
| * to turn that into machine readeable data. |
| * |
| * Spaces in keys are replaced by underscores (_). |
| * Sizes (virtual_size and disk_size) are returned in bytes |
| * Paths (image and backing_file) are the absolute path to the file |
| * |
| * @param file |
| * A QemuImgFile object containing the file to get the information from |
| * @return A HashMap with String key-value information as returned by 'qemu-img info' |
| */ |
| public Map<String, String> info(final QemuImgFile file) throws QemuImgException { |
| final Script s = new Script(_qemuImgPath); |
| s.add("info"); |
| s.add(file.getFileName()); |
| final OutputInterpreter.AllLinesParser parser = new OutputInterpreter.AllLinesParser(); |
| final String result = s.execute(parser); |
| if (result != null) { |
| throw new QemuImgException(result); |
| } |
| |
| final HashMap<String, String> info = new HashMap<String, String>(); |
| final String[] outputBuffer = parser.getLines().trim().split("\n"); |
| for (int i = 0; i < outputBuffer.length; i++) { |
| final String[] lineBuffer = outputBuffer[i].split(":", 2); |
| if (lineBuffer.length == 2) { |
| final String key = lineBuffer[0].trim().replace(" ", "_"); |
| String value = null; |
| |
| if (key.equals("virtual_size")) { |
| value = lineBuffer[1].trim().replaceAll("^.*\\(([0-9]+).*$", "$1"); |
| } else { |
| value = lineBuffer[1].trim(); |
| } |
| |
| info.put(key, value); |
| } |
| } |
| return info; |
| } |
| |
| /* List, apply, create or delete snapshots in image */ |
| public void snapshot() throws QemuImgException { |
| |
| } |
| |
| /* Changes the backing file of an image */ |
| public void rebase() throws QemuImgException { |
| |
| } |
| |
| /** |
| * Resize an image |
| * |
| * This method simple calls 'qemu-img resize'. |
| * A negative size value will get prefixed with - and a positive with + |
| * |
| * Sizes are in bytes and will be passed on that way |
| * |
| * @param file |
| * The file to resize |
| * @param size |
| * The new size |
| * @param delta |
| * Flag if the new size is a delta |
| */ |
| public void resize(final QemuImgFile file, final long size, final boolean delta) throws QemuImgException { |
| String newSize = null; |
| |
| if (size == 0) { |
| throw new QemuImgException("size should never be exactly zero"); |
| } |
| |
| if (delta) { |
| if (size > 0) { |
| newSize = "+" + Long.toString(size); |
| } else { |
| newSize = Long.toString(size); |
| } |
| } else { |
| if (size <= 0) { |
| throw new QemuImgException("size should not be negative if 'delta' is false!"); |
| } |
| newSize = Long.toString(size); |
| } |
| |
| final Script s = new Script(_qemuImgPath); |
| s.add("resize"); |
| s.add(file.getFileName()); |
| s.add(newSize); |
| s.execute(); |
| } |
| |
| /** |
| * Resize an image |
| * |
| * This method simple calls 'qemu-img resize'. |
| * A negative size value will get prefixed with - and a positive with + |
| * |
| * Sizes are in bytes and will be passed on that way |
| * |
| * @param file |
| * The file to resize |
| * @param size |
| * The new size |
| */ |
| public void resize(final QemuImgFile file, final long size) throws QemuImgException { |
| this.resize(file, size, false); |
| } |
| } |