Class: Tweek::Section

Inherits:
Array
  • Object
show all
Defined in:
lib/tweek/section.rb

Overview

A section is an array of the parsed lines, each element is an OpenStruct There are the following types of Entry With line attributes - single lines With section type and list attributes With parameter value and conditional attributes All entries may have an optional comment attribute

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(lineno, type, list, comment) ⇒ Section

Returns a new instance of Section.



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# File 'lib/tweek/section.rb', line 11

def initialize lineno, type, list, comment
  @lineno = lineno
  @type = type
  @list = list
  @comment = comment
end

Instance Attribute Details

#comment ⇒ Object (readonly)

Returns the value of attribute comment.



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# File 'lib/tweek/section.rb', line 10

def comment
  @comment
end

#lineno ⇒ Object (readonly)

Returns the value of attribute lineno.



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# File 'lib/tweek/section.rb', line 10

def lineno
  @lineno
end

#list ⇒ Object (readonly)

Returns the value of attribute list.



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# File 'lib/tweek/section.rb', line 10

def list
  @list
end

#type ⇒ Object (readonly)

Returns the value of attribute type.



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# File 'lib/tweek/section.rb', line 10

def type
  @type
end

Instance Method Details

#each_entry(cs, &block) ⇒ Object

Iterate through each entry in the section. If it’s a comment then pass to the generate method If it has a condition which is not met then pass to generate If it passes yield the entry



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# File 'lib/tweek/section.rb', line 27

def each_entry cs, &block
  self.each do |entry|
    if entry.line
      cs.generate :line, entry
      next
    end
    begin
      if cs.condfail entry.cond
        cs.generate :entry, entry
        cs.skipcond entry
        next
      end
      yield entry
    rescue Exception => e
      cs.error "#{entry.lineno}: #{e.message}"
    end
  end
end

#process(cs) ⇒ Object 



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# File 'lib/tweek/section.rb', line 46

def process cs

  cs.generate :section, section_entry unless type == '<initial>'

  return if self.empty?

  case type
  when '<initial>'
      each_entry (cs) do |entry|
      end

  when 'BLKDEV' # BLOCK DEVICE PARAMETERS

    Dir.chdir('/dev')
    devices = Dir.glob(self.list.split(' ').map{|dev| dev.gsub(/^\/dev\//,'')})

    cs.warn "Block device check skipped: no devices found" if devices.empty?

    devices.each do |blk|
      each_entry (cs) do |entry|
        entry.actual = File.open("/sys/block/#{blk}/queue/#{entry.param}", &:read).chomp rescue $!.message
        if entry.param == 'scheduler'
          entry.actual = entry.actual.slice(/\[(.*?)\]/,1) unless entry.actual == 'none'
        end
        cs.assert_equal entry.value, entry.actual, "/dev/#{blk} #{entry.param}"
        cs.generate :entry, entry
      end
    end

  when 'KERNEL' # KERNEL PARAMETERS
    each_entry (cs) do |entry|
      actual = /\b(#{entry.param})(=\S+)?\b/.match(Tweek::App.bootline)
      case
      when (entry.value == 'true' and actual)
        observed = actual.to_s
        expected = entry.param
      when (entry.value == 'true' and actual.nil?)
        expected = 'to be found'
        observed = 'was not found'
      when (entry.value == 'false' and actual)
        expected = 'to not be found'
        observed = 'was found'
      when (entry.value == 'false' and actual.nil?)
        expected = nil
        observed = nil
	else
 expected = entry.value
        observed = actual.nil? ? 'was not found' : actual[2][1..-1]
      end
      cs.assert_equal expected, observed, "Kernel parameter #{entry.param}"
      entry.actual = !actual.nil?
      cs.generate :entry, entry
    end

  when 'CLOCKSOURCE'
    each_entry (cs) do |entry|
      entry.actual=File.open("/sys/devices/system/clocksource/#{entry.param}/current_clocksource",&:read).chomp rescue $!.message
      cs.assert_equal entry.value, entry.actual, entry.param
      cs.generate :entry, entry
    end

  when 'SYSCTL' # SYSCTL SETTINGS
    each_entry (cs) do |entry|
      file = entry.param.gsub(/\./,'/')
      entry.actual = File.open("/proc/sys/#{file}", &:read).chomp.gsub(/\s+/,' ') rescue $!.message
      cs.assert_equal entry.value, entry.actual, entry.param
      cs.generate :entry, entry
    end

  when 'NET'  # NETWORK DEVICES
    devices = self.list.split(' ').map{|dev| dev.gsub(/^\/dev\//,'')}
    cs.warn "Network device check skipped: no devices found" if devices.empty?

    devices.each do |netdev|
      each_entry (cs) do |entry|

 case entry.param
 when 'driver'
   entry.actual = File.basename(File.readlink("/sys/class/net/#{netdev}/device/driver"))
   cs.assert_equal entry.value, entry.actual, entry.param

 when 'irqs'

   irqs=File.open("/proc/interrupts", &:readlines).grep(/\b#{netdev}\b/).map{|m| m.partition(':')[0].strip}

   if irqs.empty?
     cs.warn "#{netdev} IRQ check skipped: none found"
     entry.actual = 'null'
     cs.generate :entry, entry
     next
   end

   ncores = `getconf _NPROCESSORS_ONLN`.chomp.to_i rescue 0
   mismatches = 0
   irqs.each_with_index do |irq, ix|
     case entry.value
     when 'null','none','ignore'
next

     when 'aws'
expected_rps = ("00000000," * 3) + "0000ff00"
expected_rss = ("00000000," * 3) + sprintf("%08x", 1<<ix)

     when 'pin'
case ncores
when 32 # RPS on cores 10-15 and 18-31, RSS tied to 0-7
  case ix
  when 0..7
    expected_rps = ("00000000," * 3) + "fffefe00"
    expected_rss = ("00000000," * 3) + sprintf("%08x", 1<<(ix+1))
  else
    cs.warn "#{netdev} IRQ strategy '#{entry.value}' can't handle IRQ#{ix}"
  end

when 64 # Split the work across the two nodes
  case ix
  when 0..3 # alloc on node 0 (cpus 0-3)
    expected_rps = ("00000000," * 2) + "0000ffff," + "0000ffe0"
    expected_rss = ("00000000," * 3) + sprintf("%08x", 1<<(ix+1))
  when 4..7 # alloc on node 1 (
    expected_rps = ("00000000," * 2) + "ffff0000," + "ffe00000"
    expected_rss = ("00000000," * 3) + sprintf("%08x", 1<<(ix + 9))
  else
    cs.warn "#{netdev} IRQ strategy '#{entry.value}' can't handle IRQ#{ix}"
  end

else
  cs.error "#{entry.lineno}: Can't handle #{ncores} cores in IRQ strategy '#{entry.value}'"
end

     else
cs.error "#{entry.lineno}: Unrecognized #{netdev} IRQ strategy '#{entry.value}'"
     end
     actual_rss = File.open("/proc/irq/#{irq}/smp_affinity",&:read).chomp rescue $!.message
     actual_rps = File.open("/sys/class/net/#{netdev}/queues/rx-#{ix}/rps_cpus", &:read).chomp rescue $!.message
     mismatches += cs.assert_equal expected_rss, actual_rss, "#{netdev}_irq_#{irq}_rss"
     mismatches += cs.assert_equal expected_rps, actual_rps, "#{netdev}_irq_#{irq}_rps"
   end
   entry.actual = 'null' if mismatches > 0

 else # try getting the name
   begin
     entry.actual = File.open("/sys/class/net/#{netdev}/#{entry.param}", &:read).chomp.gsub(/\s+/,' ')
     cs.assert_equal entry.value, entry.actual, entry.param

   rescue
     cs.error "#{entry.lineno}: Network parameter #{entry.param} not handled: #{$!.message}"
     next
   end
        end
 cs.generate :entry, entry
      end
    end

  when 'EXT4' # EXT4 filesystems info via `dumpe2fs -h /dev/#{device}`
    mounted = File.open("/proc/mounts", &:readlines).map{|m| m.split(' ')}
    mounts = Dir.glob(self.list.split(' '))
    mounts.each do |mount|
      unless this = mounted.select{|m| (mount == m[0] or mount == m[1]) and m[2] == 'ext4'}.first
        cs.warn "EXT4 path #{mount} is not mounted or is not mounted as ext4"
        next
      end
      device = this[0].gsub('/dev/','')
      optstring = File.open("/proc/fs/ext4/#{device}/options",&:read)
      options = Hash[optstring.scan(/([^=\s]+)=([^=\s,]+)/)] # options a=b
      optstring.split(/\n/).reject{|o| o.index('=')}.each{|o| options[o] = 'true'}
      each_entry (cs) do |entry|
        entry.actual = options[entry.param] || "<not found>"
        cs.assert_equal entry.value, entry.actual, "EXT4 #{mount}: #{entry.param}"
        cs.generate :entry, entry
      end
    end

  when 'XFS' # XFS filesystems info  via `xfs_info`
    # Dynamically via: /proc/fs/xfs/... ?
    mounts = self.list.split(' ')
    if mounts.empty?
      cs.warn "#{self.lineno}: XFS device check skipped: no mountpoints found"
    end
    mounts.each do |mount|
      xfsinfo = `xfs_info #{mount} 2>/dev/null`.chomp
      if $?.exitstatus > 0
        cs.warn "No XFS filesystem at #{mount}"
        each_entry (cs) { |entry| cs.generate :entry, entry }
        next
      end
      data = Hash[xfsinfo.slice!(/^meta-data.*(?=^naming)/m).scan(/([^=\s]+)=([^=\s,]+)/)]
      naming = Hash[xfsinfo.slice!(/^naming.*(?=^log)/m).scan(/([^=\s]+)=([^=\s,]+)/)]
      log = Hash[xfsinfo.slice!(/^log.*(?=^realtime)/m).scan(/([^=\s]+)=([^=\s,]+)/)]
      realtime = Hash[xfsinfo.slice!(/^realtime.*$/m).scan(/([^=\s]+)=([^=\s,]+)/)]
      xfsparms = { 'data' => data, 'naming' => naming, 'log' => log, 'realtime' => realtime }

      each_entry (cs) do |entry|
        parameter = entry.param.split('.',2)
        entry.actual = xfsparms[parameter[0]][parameter[1]] rescue "<invalid name>"
        cs.assert_equal entry.value, entry.actual, "XFS #{mount}: #{entry.param}"
        cs.generate :entry, entry
      end
    end

  else
    cs.error "#{self.lineno}: Unknown type #{self.type}"
  end

end

#section_entry ⇒ Object 



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# File 'lib/tweek/section.rb', line 18

def section_entry
    OpenStruct.new(:lineno => lineno, :type => type, :list => list, :comment => comment )
end