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oshi.hardware.platform.linux.LinuxDisks Maven / Gradle / Ivy
/**
* Oshi (https://github.com/dblock/oshi)
*
* Copyright (c) 2010 - 2016 The Oshi Project Team
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Maintainers:
* dblock[at]dblock[dot]org
* widdis[at]gmail[dot]com
* enrico.bianchi[at]gmail[dot]com
*
* Contributors:
* https://github.com/dblock/oshi/graphs/contributors
*/
package oshi.hardware.platform.linux;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import oshi.hardware.Disks;
import oshi.hardware.HWDiskStore;
import oshi.hardware.HWPartition;
import oshi.jna.platform.linux.Udev;
import oshi.util.FileUtil;
import oshi.util.ParseUtil;
/**
* Linux hard disk implementation.
*
* @author enrico[dot]bianchi[at]gmail[dot]com
*/
public class LinuxDisks implements Disks {
private static final long serialVersionUID = 1L;
private static final Logger LOG = LoggerFactory.getLogger(LinuxDisks.class);
private static final int SECTORSIZE = 512;
private final Map mountsMap = new HashMap<>();
@Override
public HWDiskStore[] getDisks() {
HWDiskStore store = null;
List result;
updateMountsMap();
Udev.UdevHandle handle = null;
Udev.UdevDevice device = null;
Udev.UdevEnumerate enumerate = null;
Udev.UdevListEntry entry;
Udev.UdevListEntry oldEntry;
result = new ArrayList<>();
handle = Udev.INSTANCE.udev_new();
enumerate = Udev.INSTANCE.udev_enumerate_new(handle);
Udev.INSTANCE.udev_enumerate_add_match_subsystem(enumerate, "block");
Udev.INSTANCE.udev_enumerate_scan_devices(enumerate);
entry = Udev.INSTANCE.udev_enumerate_get_list_entry(enumerate);
while (true) {
try {
oldEntry = entry;
device = Udev.INSTANCE.udev_device_new_from_syspath(handle,
Udev.INSTANCE.udev_list_entry_get_name(entry));
if (Udev.INSTANCE.udev_device_get_devnode(device).startsWith("/dev/loop")
|| Udev.INSTANCE.udev_device_get_devnode(device).startsWith("/dev/ram")) {
// Ignore loopback and ram disks; do nothing
} else if ("disk".equals(Udev.INSTANCE.udev_device_get_devtype(device))) {
store = new HWDiskStore();
store.setName(Udev.INSTANCE.udev_device_get_devnode(device));
// Avoid model and serial in virtual environments
store.setModel(Udev.INSTANCE.udev_device_get_property_value(device, "ID_MODEL") == null ? "Unknown"
: Udev.INSTANCE.udev_device_get_property_value(device, "ID_MODEL"));
store.setSerial(Udev.INSTANCE.udev_device_get_property_value(device, "ID_SERIAL_SHORT") == null
? "Unknown" : Udev.INSTANCE.udev_device_get_property_value(device, "ID_SERIAL_SHORT"));
store.setSize(ParseUtil.parseLongOrDefault(
Udev.INSTANCE.udev_device_get_sysattr_value(device, "size"), 0L) * SECTORSIZE);
store.setPartitions(new HWPartition[0]);
computeDiskStats(store, device);
result.add(store);
} else if ("partition".equals(Udev.INSTANCE.udev_device_get_devtype(device)) && store != null) {
// `store` should still point to the HWDiskStore this
// partition is attached to. If not, it's an error, so skip.
HWPartition[] partArray = new HWPartition[store.getPartitions().length + 1];
System.arraycopy(store.getPartitions(), 0, partArray, 0, store.getPartitions().length);
String name = Udev.INSTANCE.udev_device_get_devnode(device);
partArray[partArray.length - 1] = new HWPartition(name,
Udev.INSTANCE.udev_device_get_sysname(device),
Udev.INSTANCE.udev_device_get_property_value(device, "ID_FS_TYPE") == null ? "partition"
: Udev.INSTANCE.udev_device_get_property_value(device, "ID_FS_TYPE"),
Udev.INSTANCE.udev_device_get_property_value(device, "ID_FS_UUID") == null ? ""
: Udev.INSTANCE.udev_device_get_property_value(device, "ID_FS_UUID"),
ParseUtil.parseLongOrDefault(Udev.INSTANCE.udev_device_get_sysattr_value(device, "size"),
0L) * SECTORSIZE,
ParseUtil.parseIntOrDefault(Udev.INSTANCE.udev_device_get_property_value(device, "MAJOR"),
0),
ParseUtil.parseIntOrDefault(Udev.INSTANCE.udev_device_get_property_value(device, "MINOR"),
0),
this.mountsMap.getOrDefault(name, ""));
store.setPartitions(partArray);
}
entry = Udev.INSTANCE.udev_list_entry_get_next(oldEntry);
} catch (NullPointerException ex) { // NOSONAR squid:S1166
LOG.debug("Reached all disks. Exiting ");
break;
} finally {
Udev.INSTANCE.udev_device_unref(device);
}
}
Udev.INSTANCE.udev_enumerate_unref(enumerate);
Udev.INSTANCE.udev_unref(handle);
return result.toArray(new HWDiskStore[result.size()]);
}
private void updateMountsMap() {
this.mountsMap.clear();
List mounts = FileUtil.readFile("/proc/self/mounts");
for (String mount : mounts) {
String[] split = mount.split("\\s+");
if (split.length < 2 || !split[0].startsWith("/dev/")) {
continue;
}
this.mountsMap.put(split[0], split[1]);
}
}
private void computeDiskStats(HWDiskStore store, Udev.UdevDevice disk) {
LinuxBlockDevStats stats;
stats = new LinuxBlockDevStats(store.getName(), disk);
store.setTimeStamp(System.currentTimeMillis());
// Reads and writes are converted in bytes
store.setReads(stats.read_ops);
store.setReadBytes(stats.read_512bytes * SECTORSIZE);
store.setWrites(stats.write_ops);
store.setWriteBytes(stats.write_512bytes * SECTORSIZE);
store.setTransferTime(stats.active_ms);
}
}
