Module: NativeFS

Defined in:
lib/fs/MiqFS/modules/NativeFS.rb

Constant Summary collapse

MOUNT_DIR = 
"/miq_mounts"
VOL_ID = 
"/KNOPPIX/lib/udev/vol_id"

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.supported?(dobj) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fs/MiqFS/modules/NativeFS.rb', line 5

def self.supported?(dobj)
  devNode = dobj.devFile
  fsType = `fstype #{devNode}`.chomp
  $log.debug "NativeFS.supported?: devNode = #{devNode}, fsType = #{fsType}" if $log.debug?

  return(false) if fsType.empty? || fsType == "auto" || fsType == "swap"
  (true)
end

Instance Method Details

#dirRmdir(p) ⇒ Object 



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# File 'lib/fs/MiqFS/modules/NativeFS.rb', line 71

def dirRmdir(p)
  Dir.rmdir(internalPath(p))
end

#freeBytes ⇒ Object 



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# File 'lib/fs/MiqFS/modules/NativeFS.rb', line 58

def freeBytes
  raise "NativeFS: #{@devNode} is not mounted" if @mountPoint.nil?
  (`df -lPB1 | grep '#{@mountPoint}$' | awk '{ print $4 }'`.chomp.to_i)
end

#fs_dirEntries(p) ⇒ Object 



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# File 'lib/fs/MiqFS/modules/NativeFS.rb', line 63

def fs_dirEntries(p)
  Dir.entries(internalPath(p))
end

#fs_dirMkdir(p) ⇒ Object 



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# File 'lib/fs/MiqFS/modules/NativeFS.rb', line 67

def fs_dirMkdir(p)
  Dir.mkdir(internalPath(p))
end

#fs_fileAtime(p) ⇒ Object 



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# File 'lib/fs/MiqFS/modules/NativeFS.rb', line 99

def fs_fileAtime(p)
  File.atime(internalPath(p))
end

#fs_fileAtime_obj(fobj) ⇒ Object 



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# File 'lib/fs/MiqFS/modules/NativeFS.rb', line 111

def fs_fileAtime_obj(fobj)
  fobj.atime
end

#fs_fileClose(fobj) ⇒ Object 



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# File 'lib/fs/MiqFS/modules/NativeFS.rb', line 141

def fs_fileClose(fobj)
  fobj.close
end

#fs_fileCtime(p) ⇒ Object 



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# File 'lib/fs/MiqFS/modules/NativeFS.rb', line 103

def fs_fileCtime(p)
  File.ctime(internalPath(p))
end

#fs_fileCtime_obj(fobj) ⇒ Object 



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# File 'lib/fs/MiqFS/modules/NativeFS.rb', line 115

def fs_fileCtime_obj(fobj)
  fobj.ctime
end

#fs_fileDelete(p) ⇒ Object 



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# File 'lib/fs/MiqFS/modules/NativeFS.rb', line 75

def fs_fileDelete(p)
  File.delete(internalPath(p))
end

#fs_fileDirectory?(p) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fs/MiqFS/modules/NativeFS.rb', line 87

def fs_fileDirectory?(p)
  File.directory? internalPath((p))
end

#fs_fileExists?(p) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fs/MiqFS/modules/NativeFS.rb', line 79

def fs_fileExists?(p)
  File.exist?(internalPath(p))
end

#fs_fileFile?(p) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fs/MiqFS/modules/NativeFS.rb', line 83

def fs_fileFile?(p)
  File.file?(internalPath(p))
end

#fs_fileMtime(p) ⇒ Object 



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# File 'lib/fs/MiqFS/modules/NativeFS.rb', line 107

def fs_fileMtime(p)
  File.mtime(internalPath(p))
end

#fs_fileMtime_obj(fobj) ⇒ Object 



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# File 'lib/fs/MiqFS/modules/NativeFS.rb', line 119

def fs_fileMtime_obj(fobj)
  fobj.mtime
end

#fs_fileOpen(p, mode = "r") ⇒ Object 



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# File 'lib/fs/MiqFS/modules/NativeFS.rb', line 123

def fs_fileOpen(p, mode = "r")
  File.new(internalPath(p), mode)
end

#fs_fileRead(fobj, len) ⇒ Object 



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# File 'lib/fs/MiqFS/modules/NativeFS.rb', line 131

def fs_fileRead(fobj, len)
  fobj.read(len)
end

#fs_fileSeek(fobj, offset, whence) ⇒ Object 



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# File 'lib/fs/MiqFS/modules/NativeFS.rb', line 127

def fs_fileSeek(fobj, offset, whence)
  fobj.seek(offset, whence)
end

#fs_fileSize(p) ⇒ Object 



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# File 'lib/fs/MiqFS/modules/NativeFS.rb', line 91

def fs_fileSize(p)
  File.size(internalPath(p))
end

#fs_fileSize_obj(fobj) ⇒ Object 



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# File 'lib/fs/MiqFS/modules/NativeFS.rb', line 95

def fs_fileSize_obj(fobj)
  fobj.stat.size
end

#fs_fileWrite(fobj, buf, len) ⇒ Object 



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# File 'lib/fs/MiqFS/modules/NativeFS.rb', line 135

def fs_fileWrite(fobj, buf, len)
  return(fobj.write(buf))     if buf.length == len
  return(fobj.write(buf[0, len])) if buf.length > len
  raise "NativeFS.fs_fileWrite: attempt to write passed the end of buffer"
end

#fs_init ⇒ Object 



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# File 'lib/fs/MiqFS/modules/NativeFS.rb', line 14

def fs_init
  dInfo = @dobj.dInfo
  raise "NativeFS: disk is not a local device" unless @dobj.devFile

  @devNode  = @dobj.devFile

  self.fsType = `fstype #{@devNode}`.chomp
  raise "NativeFS: cannot determine filesystem type for: #{@devNode}" if fsType.empty?

  @volName  = `#{VOL_ID} -l #{@devNode}`.chomp
  @fsId   = `#{VOL_ID} -u #{@devNode}`.chomp

  if dInfo.lvObj
    lv = "#{dInfo.lvObj.vgObj.vgName}-#{dInfo.lvObj.lvName}"
    @mountPoint = File.join(MOUNT_DIR, lv)
    @devNode  = File.join("/dev/mapper", lv)
  else
    @mountPoint = File.join(MOUNT_DIR, File.basename(@devNode))
  end

  if $log.debug?
    $log.debug "NativeFS.fs_init: devNode   = #{@devNode}"
    $log.debug "NativeFS.fs_init: fsType    = #{fsType}"
    $log.debug "NativeFS.fs_init: volName     = #{@volName}"
    $log.debug "NativeFS.fs_init: fsId      = #{@fsId}"
  end

  return if isMounted?(@devNode)
  system("mkdir", "-p", @mountPoint)
  $log.debug "NativeFS.fs_init: mounting #{@devNode} on #{@mountPoint}" if $log.debug?
  unless system("mount", @devNode, @mountPoint)
    raise "NativeFS: Could not mount #{@devNode} on #{@mountPoint}, exit status: #{$?.exitstatus}"
  end
end

#fs_umount ⇒ Object 



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# File 'lib/fs/MiqFS/modules/NativeFS.rb', line 49

def fs_umount
  raise "NativeFS: #{@devNode} is not mounted" if @mountPoint.nil?
  $log.debug "NativeFS.fs_umount: unmounting #{@mountPoint}" if $log.debug?
  unless system("umount", @mountPoint)
    raise "NativeFS: Could not unmount #{@devNode} from #{@mountPoint}, exit status: #{$?.exitstatus}"
  end
  @mountPoint = nil
end

#internalPath(p) ⇒ Object 



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# File 'lib/fs/MiqFS/modules/NativeFS.rb', line 145

def internalPath(p)
  raise "NativeFS: #{@devNode} is not mounted" if @mountPoint.nil?
  (File.join(@mountPoint, p))
end