Re: [PATCH v5 4/4] net/af_packet: add software checksum offload support

Stephen Hemminger
2026-02-03T14:14:05Z

On Mon, 2 Feb 2026 23:07:40 -0800
scott.k.mitch1@gmail.com wrote:

>
> +/**
> + * Compute IP and L4 checksums in software for mbufs with
> + * RTE_MBUF_F_TX_IP_CKSUM, RTE_MBUF_F_TX_UDP_CKSUM, or
> + * RTE_MBUF_F_TX_TCP_CKSUM offload flags set.
> + *
> + * On success, this function takes ownership of the input mbuf. The mbuf may be
> + * modified in-place (for direct, non-shared mbufs) or a new mbuf chain may be
> + * created (for indirect/shared mbufs) with the original becoming part of the chain.
> + *
> + * @param mbuf
> + * The packet mbuf to checksum.
> + * @return
> + * - On success: pointer to mbuf with checksums computed (may be same as input
> + * or a new mbuf chain). Caller must free only this returned pointer; the input
> + * mbuf pointer should not be freed separately as it may be part of the returned
> + * chain or may be the same as the returned pointer.
> + * - On error: NULL. Original mbuf remains valid and owned by caller.
> + */
> +__rte_experimental
> +struct rte_mbuf *
> +rte_net_ip_udptcp_cksum_mbuf(struct rte_mbuf *mbuf);

Probably need to add EXPERIMENTAL into docbook comment as well.