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/* Copyright (c) 1991 NeXT Computer, Inc. All rights reserved.
*
* IODiskPartition.h - interface for NeXT-style LogicalDisk.
*
* HISTORY
* 01-May-91 Doug Mitchell at NeXT
* Created.
*
*
* This IOLogicalDisk class handles all NeXT/Unix File system specific
* operations pertaining to a physical disk.
*
* For a given physical disk, there are two types of DiskObjects:
*
* -- The physical disk. This is a subclass of DiskObject like SCSIDisk.
* I/O to the Unix "live partition" is performed directly on the
* physical disk, as are device-specific ioctl's.
*
* -- IODiskPartition partition instances. There is one of these per valid
* partition in physicalDisk's label. There is always at least one
* IODiskPartition partition, corresponding to partition 0, even if
* there is no valid label or if the label has no partition 0. Common
* ioctl-type operations like eject are performed on IODiskPartition
* partitions; this allows common error checking before (possibly)
* passing the method on to device-specific code. All normal Unix
* reads and writes (other than thru the live partition) are performed
* on an IODiskPartition partition.
*
* Certain operations result in freeing all IODiskPartition partitions
* other than partition 0. These operations are: eject, writeLabel, and
* setFormatted. Each of these force us to discard our current partition
* state since they basically obliterate the current label. All of these
* have the following restrictions:
*
* -- they must be performed on partition 0, since all other
* IODiskPartition partitions wil be freed.
* -- No block devices can be open. (Open block devices represent open
* file systems, for which these operations are catastrophic).
* -- No other IODiskPartition partitions may be open.
*/
#import <driverkit/IOLogicalDisk.h>
#import <bsd/dev/disk_label.h>
#ifdef KERNEL
#import <driverkit/kernelDiskMethods.h>
#import <bsd/dev/ldd.h>
#endif
/*
* Public NXDisk methods.
*/
@protocol IODiskPartitionExported
/*
* Read disk label.
*/
- (IOReturn) readLabel : (out disk_label_t *)label_p;
/*
* Write disk label.
*/
- (IOReturn) writeLabel : (in disk_label_t *)label_p;
/*
* Get/set "device open" flags.
*/
- (BOOL)isBlockDeviceOpen;
- (void)setBlockDeviceOpen : (BOOL)openFlag;
- (BOOL)isRawDeviceOpen;
- (void)setRawDeviceOpen : (BOOL)openFlag;
@end
@interface IODiskPartition:IOLogicalDisk <IODiskPartitionExported>
{
@private
int _partition; /* like 3 LSB's of the old*/
/* UNIX minor number*/
BOOL _labelValid; /* label is valid*/
BOOL _blockDeviceOpen; /* block device is open*/
BOOL _rawDeviceOpen; /* raw device is open*/
int _IODiskPartition_reserved[4];
}
+ (IODeviceStyle)deviceStyle;
+ (Protocol **)requiredProtocols;
/*
* Examine a physical disk; create necessary instances of NXDisk.
* Returns non-nil if any instances were created.
*/
+ (BOOL)probe : (id)deviceDescription;
/*
* Free all attached logicalDisks.
*/
- free;
@end
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.