System information

Added the ability to describe a parent object in a matching dictionary. (r. 2845592).

Fixed a problem with interruptible IOCommandGate::commandSleep() that could corrupt the driver's work loop.

(r. 2789143).

A mechanism was added to track the number of OSContainers an object is in. If the retain count goes less than the

container count the system will panic. This is to track cases where drivers are releasing too many object

references thus corrupting the I/O Registry. (r. 2781013).

Changed IOMemoryDescriptor::getSourceSegment() to no longer ignore errors from

IOMemoryDescriptor::prepare(). This avoids the rare case where callers would assume that the memory was

prepared when it actually wasn't. (r. 2757553).

Added new API IOBufferMemoryDescriptor::inTaskWithOptions.This method allocates a memory buffer with a given

size and alignment in the task's address space specified, and returns a memory descriptor instance representing

the memory. Pageability and sharing are specified with option bits. This API is useful for graphics accelerators

drivers, for example. (r. 2950553).

The constant kIOMasterPortDefault may now be passed in IOKit APIs. When the kIOMasterPortDefault constant is

used, the IOKit APIs will look up the default master port on behalf of the caller. (r. 2920131).

A new API, IOServiceGetMatchingService, has been added that allows callers to create simpler code for locating

services they require. This new call is a combination of IOServiceGetMatchingServices() and IOIteratorNext() that

saves callers from having to create iterator and retrieve the first object from it when it is known that there is

only one match. (r. 2920026).

Mass Storage

Drivers for storage devices such as hard disks and CD-RW drives.

Fixed a problem that occurs when editing content on a disk node that (a) has content that some content driver

wishes to probe, and (b) whose driver is not loaded at the time it is needed to probe. (r. 2913406).

Fixed a bug that caused premature closure of the IOBlockStrorage driver before all of its the completion routines

had finished executing. (r. 2886160).

Added support in Storage Family to accommodate incrementally recordable file systems. For instance, udf on CD-R.

(r. 2885228).

IOBlockStorageDevice now supports 64-bit block numbers. (r. 2826537).

The new IOMedia object property kIOMediaRemovableKey and IOBlockStorageDevice object property

kIOPropertyProtocolCharacteristicsKey { kIOPropertyPhysicalInterconnectLocationKey } are now available in

IOMedia.h, IOStorageDeviceCharacteristics.h. These properties are used to describe objects as either "removable"

and "detachable". (r. 2751422).

The property IOMediaIcon was added to IOMedia objects to support custom media icons. As well the new

KextManagerCreateURLForBundleIdentifier() client function has been added for getting path to a loaded bundle so a

program can get at the bundle and its info dictionary. (r. 2566007).

Power Manager

The Power Manager is the part of the Mac OS that controls power to the internal hardware devices of Macintosh PowerBook

computers.

Uninterruptible power supplies are now supported. A basic driver now exists for UPSes conforming to the USB

Power Class specification. The default behavior is for the system to be shut down via /sbin/halt when the UPS

battery is drained below 20% of its capacity. Developers can replace this behavior with their own UPS monitor

process.(r. 2863893). (r. 2972495).

SCSI Architecture Model (SAM)

Support for devices conforming to the SCSI Architecture Model. This includes ATAPI, FireWire, and some USB storage

devices.

Added a new API, SetAutoSenseDataBuffer, to SCSITaskInterface to allow retrieving sense data longer than the

minimum eighteen bytes. (r. 2972370).