Class: MiqDisk

Inherits:
Object
  • Object
show all
Defined in:
lib/disk/MiqDisk.rb

Direct Known Subclasses

MiqPartition

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(dm, dInfo, pType, *lbaSE) ⇒ MiqDisk

Returns a new instance of MiqDisk.



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# File 'lib/disk/MiqDisk.rb', line 37

def initialize(dm, dInfo, pType, *lbaSE)
  extend(dm) unless dm.nil?
  @dModule  = dm
  @dInfo    = dInfo
  @partType = pType
  @partNum  = lbaSE.length == 3 ? lbaSE[2] : 0
  @partitions = nil
  @pvObj    = nil
  @fs     = nil   # the filesystem that resides on this disk

  if dInfo.lvObj
    @logName = "logical volume: #{dInfo.lvObj.vgObj.vgName}/#{dInfo.lvObj.lvName}"
  else
    @logName = "disk file: #{dInfo.fileName}"
  end
  @logName << " (partition: #{@partNum})"
  $log.debug "MiqDisk<#{object_id}> initialize, #{@logName}"

  d_init

  case lbaSE.length
  when 0
    @lbaStart = 0
    @lbaEnd = d_size
  when 1
    @lbaStart = lbaSE[0]
    @lbaEnd = d_size
  else
    @lbaStart = lbaSE[0]
    @lbaEnd = lbaSE[1] + @lbaStart # lbaSE[1] is the partiton size in sectors
  end

  @startByteAddr = @lbaStart * @blockSize
  @endByteAddr = @lbaEnd * @blockSize
  @size = @endByteAddr - @startByteAddr
  @seekPos = @startByteAddr

  @dInfo.diskSig ||= getDiskSig if @partNum == 0 && !@dInfo.baseOnly
  @hwId = "#{@dInfo.hardwareId}:#{@partNum}" if @dInfo.hardwareId
end

Instance Attribute Details

#blockSize ⇒ Object

Returns the value of attribute blockSize.



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# File 'lib/disk/MiqDisk.rb', line 5

def blockSize
  @blockSize
end

#dInfo ⇒ Object

Returns the value of attribute dInfo.



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# File 'lib/disk/MiqDisk.rb', line 5

def dInfo
  @dInfo
end

#diskType ⇒ Object

Returns the value of attribute diskType.



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# File 'lib/disk/MiqDisk.rb', line 5

def diskType
  @diskType
end

#endByteAddr ⇒ Object (readonly)

Returns the value of attribute endByteAddr.



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# File 'lib/disk/MiqDisk.rb', line 6

def endByteAddr
  @endByteAddr
end

#fs ⇒ Object

Returns the value of attribute fs.



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# File 'lib/disk/MiqDisk.rb', line 5

def fs
  @fs
end

#hwId ⇒ Object (readonly)

Returns the value of attribute hwId.



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# File 'lib/disk/MiqDisk.rb', line 6

def hwId
  @hwId
end

#lbaEnd ⇒ Object (readonly)

Returns the value of attribute lbaEnd.



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# File 'lib/disk/MiqDisk.rb', line 6

def lbaEnd
  @lbaEnd
end

#lbaStart ⇒ Object (readonly)

Returns the value of attribute lbaStart.



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# File 'lib/disk/MiqDisk.rb', line 6

def lbaStart
  @lbaStart
end

#logName ⇒ Object (readonly)

Returns the value of attribute logName.



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# File 'lib/disk/MiqDisk.rb', line 6

def logName
  @logName
end

#partNum ⇒ Object (readonly)

Returns the value of attribute partNum.



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# File 'lib/disk/MiqDisk.rb', line 6

def partNum
  @partNum
end

#partType ⇒ Object (readonly)

Returns the value of attribute partType.



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# File 'lib/disk/MiqDisk.rb', line 6

def partType
  @partType
end

#pvObj ⇒ Object

Returns the value of attribute pvObj.



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# File 'lib/disk/MiqDisk.rb', line 5

def pvObj
  @pvObj
end

#size ⇒ Object (readonly)

Returns the value of attribute size.



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# File 'lib/disk/MiqDisk.rb', line 6

def size
  @size
end

#startByteAddr ⇒ Object (readonly)

Returns the value of attribute startByteAddr.



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# File 'lib/disk/MiqDisk.rb', line 6

def startByteAddr
  @startByteAddr
end

Class Method Details

.getDisk(dInfo, probes = nil) ⇒ Object 



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# File 'lib/disk/MiqDisk.rb', line 8

def self.getDisk(dInfo, probes = nil)
  $log.debug "MiqDisk::getDisk: baseOnly = #{dInfo.baseOnly}" if $log
  if (dm = DiskProbe.getDiskMod(dInfo, probes))
    d = new(dm, dInfo.clone, 0)
    if dInfo.baseOnly
      $log.debug "MiqDisk::getDisk: baseOnly = true, returning parent: #{d.getBase.dInfo.fileName}" if $log
      $log.debug "MiqDisk::getDisk: child (current) disk file: #{dInfo.fileName}" if $log
      return d.getBase
    else
      $log.debug "MiqDisk::getDisk: baseOnly = false, returning: #{dInfo.fileName}" if $log
    end
    return d
  end
  (nil)
end

.pushFormatSupportForDisk(disk, probes = nil) ⇒ Object 



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# File 'lib/disk/MiqDisk.rb', line 24

def self.pushFormatSupportForDisk(disk, probes = nil)
  if (dm = DiskProbe.getDiskModForDisk(disk, probes))
    $log.debug "#{name}.pushFormatSupportForDisk: pushing #{dm.name} onto #{disk.logName}"
    di = disk.dInfo.clone
    di.downstreamDisk = disk
    d = new(dm, di, 0)
    disk.dInfo.upstreamDisk = d
    return d
  end
  $log.debug "#{name}.pushFormatSupportForDisk: no module to push for #{disk.logName}"
  disk
end

Instance Method Details

#close ⇒ Object 



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# File 'lib/disk/MiqDisk.rb', line 118

def close
  $log.debug "MiqDisk<#{object_id}> close, #{@logName}" if $log
  @partitions.each(&:close) if @partitions
  @partitions = nil
  d_close
end

#diskSig ⇒ Object 



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# File 'lib/disk/MiqDisk.rb', line 82

def diskSig
  @dInfo.diskSig ||= getDiskSig
end

#getPartitions ⇒ Object 



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# File 'lib/disk/MiqDisk.rb', line 86

def getPartitions
  discoverPartitions
end

#pushFormatSupport ⇒ Object 



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# File 'lib/disk/MiqDisk.rb', line 78

def pushFormatSupport
  self.class.pushFormatSupportForDisk(self)
end

#read(len) ⇒ Object 



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# File 'lib/disk/MiqDisk.rb', line 106

def read(len)
  rb = d_read(@seekPos, len)
  @seekPos += rb.length unless rb.nil?
  (rb)
end

#seek(amt, whence = IO::SEEK_SET) ⇒ Object 



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# File 'lib/disk/MiqDisk.rb', line 94

def seek(amt, whence = IO::SEEK_SET)
  case whence
  when IO::SEEK_CUR
    @seekPos += amt
  when IO::SEEK_END
    @seekPos = @endByteAddr + amt
  when IO::SEEK_SET
    @seekPos = amt + @startByteAddr
  end
  @seekPos
end

#seekPos ⇒ Object 



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# File 'lib/disk/MiqDisk.rb', line 90

def seekPos
  @seekPos - @startByteAddr
end

#write(buf, len) ⇒ Object 



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# File 'lib/disk/MiqDisk.rb', line 112

def write(buf, len)
  nbytes = d_write(@seekPos, buf, len)
  @seekPos += nbytes
  (nbytes)
end