Packet/Bytes FIFO (pfifo/bfifo)

The FIFO qdisc comes in two flavours: More...

Attribute Modification
int	rtnl_qdisc_fifo_set_limit (struct rtnl_qdisc *qdisc, int limit)
	Set limit of FIFO qdisc.
int	rtnl_qdisc_fifo_get_limit (struct rtnl_qdisc *qdisc)
	Get limit of a FIFO qdisc.

Detailed Description

bfifo (Byte FIFO)

Allows enqueuing until the currently queued volume in bytes exceeds the configured limit.backlog contains currently enqueued volume in bytes.

pfifo (Packet FIFO)

Allows enquueing until the currently queued number of packets exceeds the configured limit.

The configuration is exactly the same, the decision which of the two variations is going to be used is made based on the kind of the qdisc (rtnl_qdisc_set_kind()).

Function Documentation

rtnl_qdisc_fifo_set_limit()

int rtnl_qdisc_fifo_set_limit	(	struct rtnl_qdisc *	qdisc,
		int	limit
	)

Parameters

qdisc	FIFO qdisc to be modified.
limit	New limit.

Returns

0 on success or a negative error code.

Definition at line 145 of file fifo.c.

{
        struct rtnl_fifo *fifo;
        
        fifo = fifo_alloc(qdisc);
        if (!fifo)
                return nl_errno(ENOMEM);
                
        fifo->qf_limit = limit;
        fifo->qf_mask |= SCH_FIFO_ATTR_LIMIT;
 
        return 0;
}

rtnl_qdisc_fifo_get_limit()

int rtnl_qdisc_fifo_get_limit

(

struct rtnl_qdisc *

qdisc

)

Parameters

qdisc

FIFO qdisc.

Returns

Numeric limit or a negative error code.

Definition at line 164 of file fifo.c.

{
        struct rtnl_fifo *fifo;
        
        fifo = fifo_qdisc(qdisc);
        if (fifo && fifo->qf_mask & SCH_FIFO_ATTR_LIMIT)
                return fifo->qf_limit;
        else
                return nl_errno(ENOMEM);
}