Class: Distem::Algorithm::Network::TCAlgorithm

Inherits:
Algorithm
  • Object
show all
Defined in:
lib/distem/algorithm/network/tcalgorithm.rb

Overview

A common interface for TC based algorithms

Direct Known Subclasses

TBF

Constant Summary

@@lock = 
Mutex.new
@@store = 
{}
@@ifballocator = 
nil

Instance Method Summary (collapse)

Methods inherited from Algorithm

#undo

Constructor Details

- (TCAlgorithm) initialize

Returns a new instance of TCAlgorithm



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# File 'lib/distem/algorithm/network/tcalgorithm.rb', line 13

def initialize()
  @limited_bw_output = false
  @limited_lat_output = false
  @limited_bw_input = false
  @limited_lat_input = false
  if @@ifballocator.nil?
    @@ifballocator = Node::IFBAllocator::new
  end
end

Instance Method Details

- (Object) apply(viface)

:nodoc:



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# File 'lib/distem/algorithm/network/tcalgorithm.rb', line 24

def apply(viface)
  @@lock.synchronize {
    @@store[viface] = {} if !@@store[viface]
  }

  bw_output = (viface.voutput != nil) && (viface.voutput.get_property(Resource::Bandwidth.name) != nil) && (viface.voutput.get_property(Resource::Bandwidth.name).rate != nil)
  lat_output = (viface.voutput != nil) && (viface.voutput.get_property(Resource::Latency.name) != nil) && (viface.voutput.get_property(Resource::Latency.name).delay != nil)
  bw_input = (viface.vinput != nil) && (viface.vinput.get_property(Resource::Bandwidth.name) != nil) && (viface.vinput.get_property(Resource::Bandwidth.name).rate != nil)
  lat_input = (viface.vinput != nil) && (viface.vinput.get_property(Resource::Latency.name) != nil) && (viface.vinput.get_property(Resource::Latency.name).delay != nil)

  clean(viface) if (bw_output != @limited_bw_output) ||
    (lat_output != @limited_lat_output) ||
    (bw_input != @limited_bw_input) ||
    (lat_input != @limited_lat_input) ||
    viface.latency_filters
end

- (Object) clean(viface)

Clean every previous run config



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# File 'lib/distem/algorithm/network/tcalgorithm.rb', line 42

def clean(viface)
  @limited_bw_output = false
  @limited_lat_output = false
  @limited_bw_input = false
  @limited_lat_input = false
  @@lock.synchronize {
    @@store[viface] = {}
  }

  iface = Lib::NetTools::get_iface_name(viface.vnode,viface)
  ifb = viface.ifb

  str = Lib::Shell.run("tc qdisc show || true").split(/\n/).grep(/ dev #{ifb} /)
  if not str.empty? and not str[0].include?('pfifo_fast')
    inputroot = TCWrapper::QdiscRoot.new(ifb)
    Lib::Shell.run(inputroot.get_cmd(TCWrapper::Action::DEL))
  end

  str = Lib::Shell.run("tc qdisc show | grep #{iface} | grep ingress || true")
  if str and !str.empty?
    inputroot = TCWrapper::QdiscIngress.new(iface)
    Lib::Shell.run(inputroot.get_cmd(TCWrapper::Action::DEL))
  end

  @@ifballocator.free_ifb(ifb)

  str = Lib::Shell.run("tc qdisc show | grep #{iface}")
  if str and !str.empty? and !str.include?('pfifo_fast')
    outputroot = TCWrapper::QdiscRoot.new(iface)
    Lib::Shell.run(outputroot.get_cmd(TCWrapper::Action::DEL))
  end
end