ffbd2dbd8e
e1000e didn't perform software segmentation for loopback if virtio-net header is enabled, which is wrong. To fix the problem, introduce net_tx_pkt_send_custom(), which allows the caller to specify whether offloading should be assumed or not. net_tx_pkt_send_custom() also allows the caller to provide a custom sending function. Packets with virtio-net headers and ones without virtio-net headers will be provided at the same time so the function can choose the preferred version. In case of e1000e loopback, it prefers to have virtio-net headers as they allows to skip the checksum verification if VIRTIO_NET_HDR_F_DATA_VALID is set. Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com> Signed-off-by: Jason Wang <jasowang@redhat.com>
208 lines
4.8 KiB
C
208 lines
4.8 KiB
C
/*
|
|
* QEMU TX packets abstraction
|
|
*
|
|
* Copyright (c) 2012 Ravello Systems LTD (http://ravellosystems.com)
|
|
*
|
|
* Developed by Daynix Computing LTD (http://www.daynix.com)
|
|
*
|
|
* Authors:
|
|
* Dmitry Fleytman <dmitry@daynix.com>
|
|
* Tamir Shomer <tamirs@daynix.com>
|
|
* Yan Vugenfirer <yan@daynix.com>
|
|
*
|
|
* This work is licensed under the terms of the GNU GPL, version 2 or later.
|
|
* See the COPYING file in the top-level directory.
|
|
*
|
|
*/
|
|
|
|
#ifndef NET_TX_PKT_H
|
|
#define NET_TX_PKT_H
|
|
|
|
#include "net/eth.h"
|
|
#include "exec/hwaddr.h"
|
|
|
|
/* define to enable packet dump functions */
|
|
/*#define NET_TX_PKT_DEBUG*/
|
|
|
|
struct NetTxPkt;
|
|
|
|
typedef void (* NetTxPktCallback)(void *, const struct iovec *, int, const struct iovec *, int);
|
|
|
|
/**
|
|
* Init function for tx packet functionality
|
|
*
|
|
* @pkt: packet pointer
|
|
* @pci_dev: PCI device processing this packet
|
|
* @max_frags: max tx ip fragments
|
|
*/
|
|
void net_tx_pkt_init(struct NetTxPkt **pkt, PCIDevice *pci_dev,
|
|
uint32_t max_frags);
|
|
|
|
/**
|
|
* Clean all tx packet resources.
|
|
*
|
|
* @pkt: packet.
|
|
*/
|
|
void net_tx_pkt_uninit(struct NetTxPkt *pkt);
|
|
|
|
/**
|
|
* get virtio header
|
|
*
|
|
* @pkt: packet
|
|
* @ret: virtio header
|
|
*/
|
|
struct virtio_net_hdr *net_tx_pkt_get_vhdr(struct NetTxPkt *pkt);
|
|
|
|
/**
|
|
* build virtio header (will be stored in module context)
|
|
*
|
|
* @pkt: packet
|
|
* @tso_enable: TSO enabled
|
|
* @csum_enable: CSO enabled
|
|
* @gso_size: MSS size for TSO
|
|
* @ret: operation result
|
|
*
|
|
*/
|
|
bool net_tx_pkt_build_vheader(struct NetTxPkt *pkt, bool tso_enable,
|
|
bool csum_enable, uint32_t gso_size);
|
|
|
|
/**
|
|
* updates vlan tag, and adds vlan header with custom ethernet type
|
|
* in case it is missing.
|
|
*
|
|
* @pkt: packet
|
|
* @vlan: VLAN tag
|
|
* @vlan_ethtype: VLAN header Ethernet type
|
|
*
|
|
*/
|
|
void net_tx_pkt_setup_vlan_header_ex(struct NetTxPkt *pkt,
|
|
uint16_t vlan, uint16_t vlan_ethtype);
|
|
|
|
/**
|
|
* updates vlan tag, and adds vlan header in case it is missing
|
|
*
|
|
* @pkt: packet
|
|
* @vlan: VLAN tag
|
|
*
|
|
*/
|
|
static inline void
|
|
net_tx_pkt_setup_vlan_header(struct NetTxPkt *pkt, uint16_t vlan)
|
|
{
|
|
net_tx_pkt_setup_vlan_header_ex(pkt, vlan, ETH_P_VLAN);
|
|
}
|
|
|
|
/**
|
|
* populate data fragment into pkt context.
|
|
*
|
|
* @pkt: packet
|
|
* @pa: physical address of fragment
|
|
* @len: length of fragment
|
|
*
|
|
*/
|
|
bool net_tx_pkt_add_raw_fragment(struct NetTxPkt *pkt, hwaddr pa,
|
|
size_t len);
|
|
|
|
/**
|
|
* Fix ip header fields and calculate IP header and pseudo header checksums.
|
|
*
|
|
* @pkt: packet
|
|
*
|
|
*/
|
|
void net_tx_pkt_update_ip_checksums(struct NetTxPkt *pkt);
|
|
|
|
/**
|
|
* Calculate the IP header checksum.
|
|
*
|
|
* @pkt: packet
|
|
*
|
|
*/
|
|
void net_tx_pkt_update_ip_hdr_checksum(struct NetTxPkt *pkt);
|
|
|
|
/**
|
|
* get length of all populated data.
|
|
*
|
|
* @pkt: packet
|
|
* @ret: total data length
|
|
*
|
|
*/
|
|
size_t net_tx_pkt_get_total_len(struct NetTxPkt *pkt);
|
|
|
|
/**
|
|
* get packet type
|
|
*
|
|
* @pkt: packet
|
|
* @ret: packet type
|
|
*
|
|
*/
|
|
eth_pkt_types_e net_tx_pkt_get_packet_type(struct NetTxPkt *pkt);
|
|
|
|
/**
|
|
* prints packet data if debug is enabled
|
|
*
|
|
* @pkt: packet
|
|
*
|
|
*/
|
|
void net_tx_pkt_dump(struct NetTxPkt *pkt);
|
|
|
|
/**
|
|
* reset tx packet private context (needed to be called between packets)
|
|
*
|
|
* @pkt: packet
|
|
*
|
|
*/
|
|
void net_tx_pkt_reset(struct NetTxPkt *pkt);
|
|
|
|
/**
|
|
* Send packet to qemu. handles sw offloads if vhdr is not supported.
|
|
*
|
|
* @pkt: packet
|
|
* @nc: NetClientState
|
|
* @ret: operation result
|
|
*
|
|
*/
|
|
bool net_tx_pkt_send(struct NetTxPkt *pkt, NetClientState *nc);
|
|
|
|
/**
|
|
* Send packet with a custom function.
|
|
*
|
|
* @pkt: packet
|
|
* @offload: whether the callback implements offloading
|
|
* @callback: a function to be called back for each transformed packet
|
|
* @context: a pointer to be passed to the callback.
|
|
* @ret: operation result
|
|
*/
|
|
bool net_tx_pkt_send_custom(struct NetTxPkt *pkt, bool offload,
|
|
NetTxPktCallback callback, void *context);
|
|
|
|
/**
|
|
* parse raw packet data and analyze offload requirements.
|
|
*
|
|
* @pkt: packet
|
|
*
|
|
*/
|
|
bool net_tx_pkt_parse(struct NetTxPkt *pkt);
|
|
|
|
/**
|
|
* indicates if there are data fragments held by this packet object.
|
|
*
|
|
* @pkt: packet
|
|
*
|
|
*/
|
|
bool net_tx_pkt_has_fragments(struct NetTxPkt *pkt);
|
|
|
|
/**
|
|
* Fix IPv6 'plen' field.
|
|
* If ipv6 payload length field is 0 - then there should be Hop-by-Hop
|
|
* option for packets greater than 65,535.
|
|
* For packets with a payload less than 65,535: fix 'plen' field.
|
|
* For backends with vheader, we need just one packet with proper
|
|
* payload size. For now, qemu drops every packet with size greater 64K
|
|
* (see net_tx_pkt_send()) so, there is no reason to add jumbo option to ip6
|
|
* hop-by-hop extension if it's missed
|
|
*
|
|
* @pkt packet
|
|
*/
|
|
void net_tx_pkt_fix_ip6_payload_len(struct NetTxPkt *pkt);
|
|
|
|
#endif
|