libnl: Stochastic Fairness Queueing (SFQ)

libnl 3.10.0

Stochastic Fairness Queueing (SFQ)
Routing Library (libnl-route) » Traffic Control » Queueing Disciplines

## Attribute Access
void | rtnl_sfq_set_quantum (struct rtnl_qdisc *qdisc, int quantum)
| Set quantum of SFQ qdisc.
int | rtnl_sfq_get_quantum (struct rtnl_qdisc *qdisc)
| Get quantum of SFQ qdisc.
void | rtnl_sfq_set_limit (struct rtnl_qdisc *qdisc, int limit)
| Set limit of SFQ qdisc.
int | rtnl_sfq_get_limit (struct rtnl_qdisc *qdisc)
| Get limit of SFQ qdisc.
void | rtnl_sfq_set_perturb (struct rtnl_qdisc *qdisc, int perturb)
| Set perturbation interval of SFQ qdisc.
int | rtnl_sfq_get_perturb (struct rtnl_qdisc *qdisc)
| Get perturbation interval of SFQ qdisc.
int | rtnl_sfq_get_divisor (struct rtnl_qdisc *qdisc)
| Get divisor of SFQ qdisc.

## Detailed Description

Parameter Description
  - Quantum: Number of bytes to send out per slot and round.
  - Perturbation: Timer period between changing the hash function.
  - Limit: Upper limit of queue in number of packets before SFQ starts dropping packets.
  - Divisor: Hash table divisor, i.e. size of hash table.

## Function Documentation

## ◆ rtnl_sfq_set_quantum()

void rtnl_sfq_set_quantum | ( | struct rtnl_qdisc * | qdisc,
|  | int | quantum )

Set quantum of SFQ qdisc.

Parameters

  qdisc | SFQ qdisc to be modified.
  quantum | New quantum in bytes.

Returns
  0 on success or a negative error code.

Definition at line 118 of file sfq.c.

References rtnl_tc_data(), and TC_CAST.

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## ◆ rtnl_sfq_get_quantum()

int rtnl_sfq_get_quantum | ( | struct rtnl_qdisc * | qdisc | ) |

Get quantum of SFQ qdisc.

Parameters

  qdisc | SFQ qdisc.

Returns
  Quantum in bytes or a negative error code.

Definition at line 134 of file sfq.c.

References rtnl_tc_data(), and TC_CAST.

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## ◆ rtnl_sfq_set_limit()

void rtnl_sfq_set_limit | ( | struct rtnl_qdisc * | qdisc,
|  | int | limit )

Set limit of SFQ qdisc.

Parameters

  qdisc | SFQ qdisc to be modified.
  limit | New limit in number of packets.

Returns
  0 on success or a negative error code.

Definition at line 153 of file sfq.c.

References rtnl_tc_data(), and TC_CAST.

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## ◆ rtnl_sfq_get_limit()

int rtnl_sfq_get_limit | ( | struct rtnl_qdisc * | qdisc | ) |

Get limit of SFQ qdisc.

Parameters

  qdisc | SFQ qdisc.

Returns
  Limit or a negative error code.

Definition at line 169 of file sfq.c.

References rtnl_tc_data(), and TC_CAST.

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## ◆ rtnl_sfq_set_perturb()

void rtnl_sfq_set_perturb | ( | struct rtnl_qdisc * | qdisc,
|  | int | perturb )

Set perturbation interval of SFQ qdisc.

Parameters

  qdisc | SFQ qdisc to be modified.
  perturb | New perturbation interval in seconds.

Note
  A value of 0 disables perturbation altogether.

Returns
  0 on success or a negative error code.

Definition at line 189 of file sfq.c.

References rtnl_tc_data(), and TC_CAST.

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## ◆ rtnl_sfq_get_perturb()

int rtnl_sfq_get_perturb | ( | struct rtnl_qdisc * | qdisc | ) |

Get perturbation interval of SFQ qdisc.

Parameters

  qdisc | SFQ qdisc.

Returns
  Perturbation interval in seconds or a negative error code.

Definition at line 205 of file sfq.c.

References rtnl_tc_data(), and TC_CAST.

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## ◆ rtnl_sfq_get_divisor()

int rtnl_sfq_get_divisor | ( | struct rtnl_qdisc * | qdisc | ) |

Get divisor of SFQ qdisc.

Parameters

  qdisc | SFQ qdisc.

Returns
  Divisor in number of entries or a negative error code.

Definition at line 223 of file sfq.c.

References rtnl_tc_data(), and TC_CAST.

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