Return to LogDiskAndInsertion CVS log

Up to [Apple Darwin 0.x] / driverkit / notes

Annotation of driverkit/notes/LogDiskAndInsertion, revision 1.1

1.1     ! root        1:                logical disks and insertion detection
        !             2:                
        !             3: * no multi-volume support. One unit per physical drive. Disallow eject 
        !             4:   while volume is open, just like disallow umount while root vnode is
        !             5:   referenced. (Poll OS group to find what they think of this...)
        !             6:   
        !             7: * definition : unit = physical drive.
        !             8: 
        !             9: * each physDevice always has a rawDevice (its first logicalDisk).
        !            10:   label is valid.
        !            11: 
        !            12: * a physDevice has blockDevices if a label is valid and the label has
        !            13:   valid partitions (one blockDev per partition).
        !            14:   
        !            15: * Probe time: 
        !            16:   for each unit {
        !            17:        live partition is DiskObject subclass;
        !            18:        LD +probe {
        !            19:                if label present {
        !            20:                        create a raw disk Logical Unit;
        !            21:                        create a Block Device LD for each partition;
        !            22:                }
        !            23:        }
        !            24:        if removable {
        !            25:                start a vol_check thread;
        !            26:        }
        !            27:   }
        !            28:   
        !            29:   actions on physDevice
        !            30:     
        !            31:     boot
        !            32:        set one-time only params in subclass-private init
        !            33:        set phys params in getPhysParams
        !            34:        UnixDisk +probe (create live device, raw/block if necessary)
        !            35:                
        !            36:     setFormatted:flag
        !            37:         if any logicalDevices open
        !            38:                reject;
        !            39:          self labelValid, formatted = 0
        !            40:         delete raw devices and blockDevices
        !            41: 
        !            42:     setLabelValid:1
        !            43:        set labelValid
        !            44:        UnixDisk +probe
        !            45: 
        !            46:     setLabelValid:0
        !            47:         if any logicalDevices open
        !            48:                reject;
        !            49:          self labelValid = 0
        !            50:         delete raw devices and blockDevices
        !            51:        
        !            52:     eject
        !            53:        if any logicalDisks open
        !            54:                reject;
        !            55:        labelValid, formatted = 0
        !            56:        delete raw devices and blockDevices
        !            57:        
        !            58:     insert detection
        !            59:        set phys params in getPhysParams
        !            60:        UnixDisk +probe (create live device, raw/block if necessary)
        !            61: 
        !            62: DiskObject/subclass
        !            63:        created:
        !            64:                subclass's probe:
        !            65:        one-time only init:
        !            66:                subclass-private init
        !            67:        physical parameter init (dev_size, block_size)
        !            68:                subclass getPhysParams (mandatory for all subclasses)
        !            69:                
        !            70: UnixDisk probe:physDevice
        !            71:        read label;
        !            72:        if bad
        !            73:                return;
        !            74:        create rawDevice per label info;
        !            75:        registerUnixDisk:rawDevice type:DISK_TYPE_RAW
        !            76:        create blockDevice for each valid partition;
        !            77:        
        !            78: todo on thursd:
        !            79:        old unixdisk class
        !            80:                rename
        !            81:                add devEjectDisk, getPhysParams
        !            82:                make it work wirth new DiskObject, UnixDisk.
        !            83:        write a disk insertion detection thread (somewhere....)

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.