Class LinuxHWDiskStoreNF

java.lang.Object

oshi.hardware.common.AbstractHWDiskStore

oshi.hardware.common.platform.linux.LinuxHWDiskStore

oshi.hardware.common.platform.linux.nativefree.LinuxHWDiskStoreNF

All Implemented Interfaces:

HWDiskStore

@ThreadSafe
public final class LinuxHWDiskStoreNF
extends LinuxHWDiskStore

Native-free Linux disk store implementation. Enumerates block devices from /sys/block/ and reads stats from sysfs, without requiring udev.

Nested Class Summary

Nested classes/interfaces inherited from class LinuxHWDiskStore

LinuxHWDiskStore.UdevStat

Modifier and Type	Class	Description
protected static enum	LinuxHWDiskStore.UdevStat	Field ordering in udev stat output.

Field Summary

Fields inherited from class LinuxHWDiskStore

BLOCK, DEVICE_MAPPER, DISK, DM_LV_NAME, DM_NAME, DM_UUID, DM_VG_NAME, ENCRYPTED_VOLUME, ID_FS_LABEL, ID_FS_TYPE, ID_FS_UUID, ID_MODEL, ID_SERIAL_SHORT, LOGICAL_VOLUME_GROUP, MAJOR, MINOR, PARTITION, SECTORSIZE, SIZE, STAT, UDEV_STAT_LENGTH, UDEV_STAT_ORDERS

Modifier and Type	Field	Description
protected static final String	BLOCK	Sysfs block device type.
protected static final String	DEVICE_MAPPER	Device-mapper description string.
protected static final String	DISK	Sysfs disk device type.
protected static final String	DM_LV_NAME	Device-mapper logical volume name property.
protected static final String	DM_NAME	Device-mapper name property.
protected static final String	DM_UUID	Device-mapper UUID property.
protected static final String	DM_VG_NAME	Device-mapper volume group name property.
protected static final String	ENCRYPTED_VOLUME	Encrypted volume description string.
protected static final String	ID_FS_LABEL	Udev filesystem label property.
protected static final String	ID_FS_TYPE	Udev filesystem type property.
protected static final String	ID_FS_UUID	Udev filesystem UUID property.
protected static final String	ID_MODEL	Udev model property.
protected static final String	ID_SERIAL_SHORT	Udev serial number property.
protected static final String	LOGICAL_VOLUME_GROUP	Logical volume group description string.
protected static final String	MAJOR	Udev MAJOR property.
protected static final String	MINOR	Udev MINOR property.
protected static final String	PARTITION	Sysfs partition device type.
protected static final int	SECTORSIZE	Sector size in bytes.
protected static final String	SIZE	Sysfs size file name.
protected static final String	STAT	Sysfs stat file name.
protected static final int	UDEV_STAT_LENGTH	Number of fields in udev stat output.
protected static final int[]	UDEV_STAT_ORDERS	Ordering array for parsing udev stat fields.

Fields inherited from class AbstractHWDiskStore

currentQueueLength, partitionList, readBytes, reads, timeStamp, transferTime, writeBytes, writes

Modifier and Type	Field	Description
protected long	currentQueueLength
protected final AtomicReference<List<HWPartition>>	partitionList
protected long	readBytes
protected long	reads
protected long	timeStamp
protected long	transferTime
protected long	writeBytes
protected long	writes

Method Summary

Modifier and Type	Method	Description
static List<HWDiskStore>	getDisks()	Gets disk stores on this machine.
boolean	updateAttributes()	Make a best effort to update all the statistics about the drive without needing to recreate the drive list.

Methods inherited from class LinuxHWDiskStore

addDeviceMapperPartition, computeDiskStats, finalizePartitions, getDependentNamesFromHoldersDirectory, getDmDevicePath, getModelForDmDevice, getMountPointForDmDevice, getMountPointOfDmDevice, getMutablePartitionList, getPartitionNameForDmDevice, isEncryptedVolume, isLogicalVolume, readMountsMap

Modifier and Type	Method	Description
protected static void	addDeviceMapperPartition(LinuxHWDiskStore store, Map<String,String> mountsMap, String dmUuid, String vgName, String lvName, String dmName, String devnode, String sysname, String sysPath, String fsType, String fsUuid, String fsLabel, long size, int major, int minor)	Adds a partition entry for a supported device-mapper device.
protected static void	computeDiskStats(LinuxHWDiskStore store, String devstat)	Computes and sets disk statistics from a stat string.
protected static void	finalizePartitions(List<HWDiskStore> result)	Sorts and makes partition lists unmodifiable for all disk stores.
protected static String	getDependentNamesFromHoldersDirectory(String sysPath)	Gets dependent device names from the holders directory.
protected static String	getDmDevicePath(String dmName, String devnode)	Gets the preferred path for a device-mapper device.
protected static String	getModelForDmDevice(String dmUuid)	Gets the model description for a device-mapper device.
protected static String	getMountPointForDmDevice(Map<String,String> mountsMap, String dmName, String devnode, String sysPath)	Gets the mount point for a device-mapper device.
protected static String	getMountPointOfDmDevice(String vgName, String lvName)	Gets the mount point path for a device-mapper device.
protected List<HWPartition>	getMutablePartitionList()	Gets the mutable partition list for building.
protected static String	getPartitionNameForDmDevice(String vgName, String lvName)	Gets the partition name for a device-mapper device.
protected static boolean	isEncryptedVolume(String dmUuid)	Checks whether a device-mapper UUID identifies an encrypted volume.
protected static boolean	isLogicalVolume(String dmUuid)	Checks whether a device-mapper UUID identifies an LVM logical volume.
protected static Map<String,String>	readMountsMap()	Reads /proc/mounts into a map of device to mount point.

Methods inherited from class AbstractHWDiskStore

getCurrentQueueLength, getDiskType, getModel, getName, getPartitions, getReadBytes, getReads, getSerial, getSize, getTimeStamp, getTransferTime, getWriteBytes, getWrites, setDiskStats, setPartitionList, toString

Modifier and Type	Method	Description
long	getCurrentQueueLength()	The length of the disk queue (#I/O's in progress).
String	getDiskType()	The type of the disk, such as SSD, HDD, Removable, Virtual, or Unknown.
String	getModel()	The disk model
String	getName()	The disk name
List<HWPartition>	getPartitions()	The partitions on this disk.
long	getReadBytes()	The number of bytes read from the disk
long	getReads()	The number of reads from the disk
String	getSerial()	The disk serial number, if available.
long	getSize()	The size of the disk
long	getTimeStamp()	The time this disk's statistics were updated.
long	getTransferTime()	The time spent reading or writing, in milliseconds.
long	getWriteBytes()	The number of bytes written to the disk
long	getWrites()	The number of writes to the disk
protected void	setDiskStats(long reads, long readBytes, long writes, long writeBytes, long currentQueueLength, long transferTime, long timeStamp)	Sets the disk statistics.
protected void	setPartitionList(List<HWPartition> partitionList)	Sets the partition list.
String	toString()

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Method Details

getDisks

public static List<HWDiskStore> getDisks()

Gets disk stores on this machine.

Returns:

a list of HWDiskStore objects

updateAttributes

public boolean updateAttributes()

Description copied from interface: HWDiskStore

Make a best effort to update all the statistics about the drive without needing to recreate the drive list. This method provides for more frequent periodic updates of individual drive statistics but may be less efficient to use if updating all drives. It will not detect if a removable drive has been removed and replaced by a different drive in between method calls.

Returns:

True if the update was (probably) successful, false if the disk was not found