mbuf.c File Reference

#include "mbuf.h"

Functions
bool	Mbuf_RegisterDynFields ()
	Register mbuf dynfields. More...
int	Mbuf_AsIovec (struct rte_mbuf *m, struct iovec *iov, uint32_t offset, uint32_t length)
	Gather segments of m as iovec. More...
struct rte_mbuf *	Mbuf_AllocRoom (struct rte_mempool *mp, struct iovec *iov, int *iovcnt, uint16_t firstHeadroom, uint16_t firstDataLen, uint16_t eachHeadroom, uint16_t eachDataLen, uint32_t pktLen)
	Allocate room within chained mbufs. More...
void	Mbuf_RemainingIovec (struct spdk_iov_xfer ix, struct iovec *iov, int *iovcnt)
	Recover remaining iovecs after spdk_iov_xfer_* operations. More...

Variables
int	Mbuf_Timestamp_DynFieldOffset_ = -1

Function Documentation

Mbuf_AllocRoom()

struct rte_mbuf* Mbuf_AllocRoom	(	struct rte_mempool *	mp,
		struct iovec *	iov,
		int *	iovcnt,
		uint16_t	firstHeadroom,
		uint16_t	firstDataLen,
		uint16_t	eachHeadroom,
		uint16_t	eachDataLen,
		uint32_t	pktLen
	)

Allocate room within chained mbufs.

Parameters

	mp	mempool to create mbufs.
[out]	iov	room iov, must be filled/zeroed by caller.
[in,out]	iovcnt	iov capacity; room iov count.
	firstHeadroom	headroom in first mbuf.
	firstDataLen	data length in first mbuf, defaults to maximum available.
	eachHeadroom	headroom in subsequent mbuf.
	eachDataLen	data length in subsequent mbuf, defaults to maximum available.
	pktLen	total packet length i.e. size of room.

Returns

chained mbuf, or NULL upon failure.

Postcondition

rte_errno=E2BIG if either firstHeadroom+firstDataLen or eachHeadroom+eachDataLen exceeds mp dataroom.

rte_errno=EFBIG if number of segments would exceed *iovcnt .

Mbuf_AsIovec()

int Mbuf_AsIovec	(	struct rte_mbuf *	m,
		struct iovec *	iov,
		uint32_t	offset,
		uint32_t	length
	)

Gather segments of m as iovec.

Parameters

[out]

iov

must have m->nb_segs room.

Returns

iov count.

Mbuf_RegisterDynFields()

bool Mbuf_RegisterDynFields

(

)

Register mbuf dynfields.

Mbuf_RemainingIovec()

void Mbuf_RemainingIovec	(	struct spdk_iov_xfer	ix,
		struct iovec *	iov,
		int *	iovcnt
	)

Recover remaining iovecs after spdk_iov_xfer_* operations.

Parameters

	ix	initialized io_xfer instance.
[out]	iov	remaining iov, must have capacity as spdk_iov_xfer_init iovcnt.
[out]	iovcnt	remaining iov count.

Variable Documentation

Mbuf_Timestamp_DynFieldOffset_

int Mbuf_Timestamp_DynFieldOffset_ = -1