Packet abstraction for VMWARE network devices
Signed-off-by: Dmitry Fleytman <dmitry@daynix.com> Signed-off-by: Yan Vugenfirer <yan@daynix.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
parent
75020a7021
commit
e263cd49c7
@ -119,6 +119,7 @@ common-obj-$(CONFIG_PCNET_PCI) += pcnet-pci.o
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common-obj-$(CONFIG_PCNET_COMMON) += pcnet.o
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common-obj-$(CONFIG_PCNET_COMMON) += pcnet.o
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common-obj-$(CONFIG_E1000_PCI) += e1000.o
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common-obj-$(CONFIG_E1000_PCI) += e1000.o
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common-obj-$(CONFIG_RTL8139_PCI) += rtl8139.o
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common-obj-$(CONFIG_RTL8139_PCI) += rtl8139.o
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common-obj-$(CONFIG_VMXNET3_PCI) += vmxnet_tx_pkt.o vmxnet_rx_pkt.o
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common-obj-$(CONFIG_SMC91C111) += smc91c111.o
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common-obj-$(CONFIG_SMC91C111) += smc91c111.o
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common-obj-$(CONFIG_LAN9118) += lan9118.o
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common-obj-$(CONFIG_LAN9118) += lan9118.o
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187
hw/vmxnet_rx_pkt.c
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187
hw/vmxnet_rx_pkt.c
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@ -0,0 +1,187 @@
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/*
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* QEMU VMWARE VMXNET* paravirtual NICs - RX packets abstractions
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*
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* Copyright (c) 2012 Ravello Systems LTD (http://ravellosystems.com)
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*
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* Developed by Daynix Computing LTD (http://www.daynix.com)
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*
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* Authors:
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* Dmitry Fleytman <dmitry@daynix.com>
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* Tamir Shomer <tamirs@daynix.com>
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* Yan Vugenfirer <yan@daynix.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*
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*/
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#include "vmxnet_rx_pkt.h"
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#include "net/eth.h"
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#include "qemu-common.h"
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#include "qemu/iov.h"
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#include "net/checksum.h"
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#include "net/tap.h"
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/*
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* RX packet may contain up to 2 fragments - rebuilt eth header
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* in case of VLAN tag stripping
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* and payload received from QEMU - in any case
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*/
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#define VMXNET_MAX_RX_PACKET_FRAGMENTS (2)
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struct VmxnetRxPkt {
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struct virtio_net_hdr virt_hdr;
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uint8_t ehdr_buf[ETH_MAX_L2_HDR_LEN];
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struct iovec vec[VMXNET_MAX_RX_PACKET_FRAGMENTS];
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uint16_t vec_len;
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uint32_t tot_len;
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uint16_t tci;
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bool vlan_stripped;
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bool has_virt_hdr;
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eth_pkt_types_e packet_type;
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/* Analysis results */
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bool isip4;
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bool isip6;
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bool isudp;
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bool istcp;
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};
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void vmxnet_rx_pkt_init(struct VmxnetRxPkt **pkt, bool has_virt_hdr)
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{
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struct VmxnetRxPkt *p = g_malloc0(sizeof *p);
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p->has_virt_hdr = has_virt_hdr;
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*pkt = p;
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}
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void vmxnet_rx_pkt_uninit(struct VmxnetRxPkt *pkt)
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{
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g_free(pkt);
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}
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struct virtio_net_hdr *vmxnet_rx_pkt_get_vhdr(struct VmxnetRxPkt *pkt)
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{
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assert(pkt);
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return &pkt->virt_hdr;
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}
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void vmxnet_rx_pkt_attach_data(struct VmxnetRxPkt *pkt, const void *data,
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size_t len, bool strip_vlan)
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{
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uint16_t tci = 0;
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uint16_t ploff;
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assert(pkt);
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pkt->vlan_stripped = false;
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if (strip_vlan) {
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pkt->vlan_stripped = eth_strip_vlan(data, pkt->ehdr_buf, &ploff, &tci);
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}
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if (pkt->vlan_stripped) {
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pkt->vec[0].iov_base = pkt->ehdr_buf;
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pkt->vec[0].iov_len = ploff - sizeof(struct vlan_header);
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pkt->vec[1].iov_base = (uint8_t *) data + ploff;
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pkt->vec[1].iov_len = len - ploff;
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pkt->vec_len = 2;
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pkt->tot_len = len - ploff + sizeof(struct eth_header);
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} else {
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pkt->vec[0].iov_base = (void *)data;
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pkt->vec[0].iov_len = len;
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pkt->vec_len = 1;
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pkt->tot_len = len;
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}
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pkt->tci = tci;
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eth_get_protocols(data, len, &pkt->isip4, &pkt->isip6,
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&pkt->isudp, &pkt->istcp);
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}
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void vmxnet_rx_pkt_dump(struct VmxnetRxPkt *pkt)
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{
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#ifdef VMXNET_RX_PKT_DEBUG
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VmxnetRxPkt *pkt = (VmxnetRxPkt *)pkt;
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assert(pkt);
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printf("RX PKT: tot_len: %d, vlan_stripped: %d, vlan_tag: %d\n",
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pkt->tot_len, pkt->vlan_stripped, pkt->tci);
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#endif
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}
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void vmxnet_rx_pkt_set_packet_type(struct VmxnetRxPkt *pkt,
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eth_pkt_types_e packet_type)
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{
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assert(pkt);
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pkt->packet_type = packet_type;
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}
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eth_pkt_types_e vmxnet_rx_pkt_get_packet_type(struct VmxnetRxPkt *pkt)
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{
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assert(pkt);
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return pkt->packet_type;
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}
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size_t vmxnet_rx_pkt_get_total_len(struct VmxnetRxPkt *pkt)
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{
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assert(pkt);
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return pkt->tot_len;
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}
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void vmxnet_rx_pkt_get_protocols(struct VmxnetRxPkt *pkt,
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bool *isip4, bool *isip6,
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bool *isudp, bool *istcp)
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{
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assert(pkt);
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*isip4 = pkt->isip4;
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*isip6 = pkt->isip6;
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*isudp = pkt->isudp;
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*istcp = pkt->istcp;
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}
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struct iovec *vmxnet_rx_pkt_get_iovec(struct VmxnetRxPkt *pkt)
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{
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assert(pkt);
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return pkt->vec;
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}
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void vmxnet_rx_pkt_set_vhdr(struct VmxnetRxPkt *pkt,
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struct virtio_net_hdr *vhdr)
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{
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assert(pkt);
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memcpy(&pkt->virt_hdr, vhdr, sizeof pkt->virt_hdr);
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}
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bool vmxnet_rx_pkt_is_vlan_stripped(struct VmxnetRxPkt *pkt)
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{
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assert(pkt);
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return pkt->vlan_stripped;
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}
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bool vmxnet_rx_pkt_has_virt_hdr(struct VmxnetRxPkt *pkt)
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{
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assert(pkt);
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return pkt->has_virt_hdr;
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}
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uint16_t vmxnet_rx_pkt_get_num_frags(struct VmxnetRxPkt *pkt)
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{
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assert(pkt);
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return pkt->vec_len;
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}
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uint16_t vmxnet_rx_pkt_get_vlan_tag(struct VmxnetRxPkt *pkt)
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{
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assert(pkt);
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return pkt->tci;
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}
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174
hw/vmxnet_rx_pkt.h
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174
hw/vmxnet_rx_pkt.h
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/*
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* QEMU VMWARE VMXNET* paravirtual NICs - RX packets abstraction
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*
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* Copyright (c) 2012 Ravello Systems LTD (http://ravellosystems.com)
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*
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* Developed by Daynix Computing LTD (http://www.daynix.com)
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*
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* Authors:
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* Dmitry Fleytman <dmitry@daynix.com>
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* Tamir Shomer <tamirs@daynix.com>
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* Yan Vugenfirer <yan@daynix.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*
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*/
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#ifndef VMXNET_RX_PKT_H
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#define VMXNET_RX_PKT_H
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#include "stdint.h"
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#include "stdbool.h"
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#include "net/eth.h"
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/* defines to enable packet dump functions */
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/*#define VMXNET_RX_PKT_DEBUG*/
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struct VmxnetRxPkt;
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/**
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* Clean all rx packet resources
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*
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* @pkt: packet
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*
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*/
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void vmxnet_rx_pkt_uninit(struct VmxnetRxPkt *pkt);
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/**
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* Init function for rx packet functionality
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*
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* @pkt: packet pointer
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* @has_virt_hdr: device uses virtio header
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*
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*/
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void vmxnet_rx_pkt_init(struct VmxnetRxPkt **pkt, bool has_virt_hdr);
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/**
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* returns total length of data attached to rx context
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*
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* @pkt: packet
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*
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* Return: nothing
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*
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*/
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size_t vmxnet_rx_pkt_get_total_len(struct VmxnetRxPkt *pkt);
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/**
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* fetches packet analysis results
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*
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* @pkt: packet
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* @isip4: whether the packet given is IPv4
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* @isip6: whether the packet given is IPv6
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* @isudp: whether the packet given is UDP
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* @istcp: whether the packet given is TCP
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*
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*/
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void vmxnet_rx_pkt_get_protocols(struct VmxnetRxPkt *pkt,
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bool *isip4, bool *isip6,
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bool *isudp, bool *istcp);
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/**
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* returns virtio header stored in rx context
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*
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* @pkt: packet
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* @ret: virtio header
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*
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*/
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struct virtio_net_hdr *vmxnet_rx_pkt_get_vhdr(struct VmxnetRxPkt *pkt);
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/**
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* returns packet type
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*
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* @pkt: packet
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* @ret: packet type
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*
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*/
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eth_pkt_types_e vmxnet_rx_pkt_get_packet_type(struct VmxnetRxPkt *pkt);
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/**
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* returns vlan tag
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*
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* @pkt: packet
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* @ret: VLAN tag
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*
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*/
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uint16_t vmxnet_rx_pkt_get_vlan_tag(struct VmxnetRxPkt *pkt);
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/**
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* tells whether vlan was stripped from the packet
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*
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* @pkt: packet
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* @ret: VLAN stripped sign
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*
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*/
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bool vmxnet_rx_pkt_is_vlan_stripped(struct VmxnetRxPkt *pkt);
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/**
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* notifies caller if the packet has virtio header
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*
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* @pkt: packet
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* @ret: true if packet has virtio header, false otherwize
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*
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*/
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bool vmxnet_rx_pkt_has_virt_hdr(struct VmxnetRxPkt *pkt);
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/**
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* returns number of frags attached to the packet
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*
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* @pkt: packet
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* @ret: number of frags
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*
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*/
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uint16_t vmxnet_rx_pkt_get_num_frags(struct VmxnetRxPkt *pkt);
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/**
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* attach data to rx packet
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*
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* @pkt: packet
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* @data: pointer to the data buffer
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* @len: data length
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* @strip_vlan: should the module strip vlan from data
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*
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*/
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void vmxnet_rx_pkt_attach_data(struct VmxnetRxPkt *pkt, const void *data,
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size_t len, bool strip_vlan);
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/**
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* returns io vector that holds the attached data
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*
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* @pkt: packet
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* @ret: pointer to IOVec
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*
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*/
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struct iovec *vmxnet_rx_pkt_get_iovec(struct VmxnetRxPkt *pkt);
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/**
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* prints rx packet data if debug is enabled
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*
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* @pkt: packet
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*
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*/
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void vmxnet_rx_pkt_dump(struct VmxnetRxPkt *pkt);
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/**
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* copy passed vhdr data to packet context
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*
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* @pkt: packet
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* @vhdr: VHDR buffer
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*
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*/
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void vmxnet_rx_pkt_set_vhdr(struct VmxnetRxPkt *pkt,
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struct virtio_net_hdr *vhdr);
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/**
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* save packet type in packet context
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*
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* @pkt: packet
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* @packet_type: the packet type
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*
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*/
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void vmxnet_rx_pkt_set_packet_type(struct VmxnetRxPkt *pkt,
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eth_pkt_types_e packet_type);
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#endif
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567
hw/vmxnet_tx_pkt.c
Normal file
567
hw/vmxnet_tx_pkt.c
Normal file
@ -0,0 +1,567 @@
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/*
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* QEMU VMWARE VMXNET* paravirtual NICs - TX packets abstractions
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*
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* Copyright (c) 2012 Ravello Systems LTD (http://ravellosystems.com)
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*
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* Developed by Daynix Computing LTD (http://www.daynix.com)
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|
*
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* Authors:
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* Dmitry Fleytman <dmitry@daynix.com>
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* 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.
|
||||||
|
*
|
||||||
|
*/
|
||||||
|
|
||||||
|
#include "vmxnet_tx_pkt.h"
|
||||||
|
#include "net/eth.h"
|
||||||
|
#include "qemu-common.h"
|
||||||
|
#include "qemu/iov.h"
|
||||||
|
#include "net/checksum.h"
|
||||||
|
#include "net/tap.h"
|
||||||
|
#include "net/net.h"
|
||||||
|
#include "exec/cpu-common.h"
|
||||||
|
|
||||||
|
enum {
|
||||||
|
VMXNET_TX_PKT_VHDR_FRAG = 0,
|
||||||
|
VMXNET_TX_PKT_L2HDR_FRAG,
|
||||||
|
VMXNET_TX_PKT_L3HDR_FRAG,
|
||||||
|
VMXNET_TX_PKT_PL_START_FRAG
|
||||||
|
};
|
||||||
|
|
||||||
|
/* TX packet private context */
|
||||||
|
struct VmxnetTxPkt {
|
||||||
|
struct virtio_net_hdr virt_hdr;
|
||||||
|
bool has_virt_hdr;
|
||||||
|
|
||||||
|
struct iovec *raw;
|
||||||
|
uint32_t raw_frags;
|
||||||
|
uint32_t max_raw_frags;
|
||||||
|
|
||||||
|
struct iovec *vec;
|
||||||
|
|
||||||
|
uint8_t l2_hdr[ETH_MAX_L2_HDR_LEN];
|
||||||
|
|
||||||
|
uint32_t payload_len;
|
||||||
|
|
||||||
|
uint32_t payload_frags;
|
||||||
|
uint32_t max_payload_frags;
|
||||||
|
|
||||||
|
uint16_t hdr_len;
|
||||||
|
eth_pkt_types_e packet_type;
|
||||||
|
uint8_t l4proto;
|
||||||
|
};
|
||||||
|
|
||||||
|
void vmxnet_tx_pkt_init(struct VmxnetTxPkt **pkt, uint32_t max_frags,
|
||||||
|
bool has_virt_hdr)
|
||||||
|
{
|
||||||
|
struct VmxnetTxPkt *p = g_malloc0(sizeof *p);
|
||||||
|
|
||||||
|
p->vec = g_malloc((sizeof *p->vec) *
|
||||||
|
(max_frags + VMXNET_TX_PKT_PL_START_FRAG));
|
||||||
|
|
||||||
|
p->raw = g_malloc((sizeof *p->raw) * max_frags);
|
||||||
|
|
||||||
|
p->max_payload_frags = max_frags;
|
||||||
|
p->max_raw_frags = max_frags;
|
||||||
|
p->has_virt_hdr = has_virt_hdr;
|
||||||
|
p->vec[VMXNET_TX_PKT_VHDR_FRAG].iov_base = &p->virt_hdr;
|
||||||
|
p->vec[VMXNET_TX_PKT_VHDR_FRAG].iov_len =
|
||||||
|
p->has_virt_hdr ? sizeof p->virt_hdr : 0;
|
||||||
|
p->vec[VMXNET_TX_PKT_L2HDR_FRAG].iov_base = &p->l2_hdr;
|
||||||
|
p->vec[VMXNET_TX_PKT_L3HDR_FRAG].iov_base = NULL;
|
||||||
|
p->vec[VMXNET_TX_PKT_L3HDR_FRAG].iov_len = 0;
|
||||||
|
|
||||||
|
*pkt = p;
|
||||||
|
}
|
||||||
|
|
||||||
|
void vmxnet_tx_pkt_uninit(struct VmxnetTxPkt *pkt)
|
||||||
|
{
|
||||||
|
if (pkt) {
|
||||||
|
g_free(pkt->vec);
|
||||||
|
g_free(pkt->raw);
|
||||||
|
g_free(pkt);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
void vmxnet_tx_pkt_update_ip_checksums(struct VmxnetTxPkt *pkt)
|
||||||
|
{
|
||||||
|
uint16_t csum;
|
||||||
|
uint32_t ph_raw_csum;
|
||||||
|
assert(pkt);
|
||||||
|
uint8_t gso_type = pkt->virt_hdr.gso_type & ~VIRTIO_NET_HDR_GSO_ECN;
|
||||||
|
struct ip_header *ip_hdr;
|
||||||
|
|
||||||
|
if (VIRTIO_NET_HDR_GSO_TCPV4 != gso_type &&
|
||||||
|
VIRTIO_NET_HDR_GSO_UDP != gso_type) {
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
ip_hdr = pkt->vec[VMXNET_TX_PKT_L3HDR_FRAG].iov_base;
|
||||||
|
|
||||||
|
if (pkt->payload_len + pkt->vec[VMXNET_TX_PKT_L3HDR_FRAG].iov_len >
|
||||||
|
ETH_MAX_IP_DGRAM_LEN) {
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
ip_hdr->ip_len = cpu_to_be16(pkt->payload_len +
|
||||||
|
pkt->vec[VMXNET_TX_PKT_L3HDR_FRAG].iov_len);
|
||||||
|
|
||||||
|
/* Calculate IP header checksum */
|
||||||
|
ip_hdr->ip_sum = 0;
|
||||||
|
csum = net_raw_checksum((uint8_t *)ip_hdr,
|
||||||
|
pkt->vec[VMXNET_TX_PKT_L3HDR_FRAG].iov_len);
|
||||||
|
ip_hdr->ip_sum = cpu_to_be16(csum);
|
||||||
|
|
||||||
|
/* Calculate IP pseudo header checksum */
|
||||||
|
ph_raw_csum = eth_calc_pseudo_hdr_csum(ip_hdr, pkt->payload_len);
|
||||||
|
csum = cpu_to_be16(~net_checksum_finish(ph_raw_csum));
|
||||||
|
iov_from_buf(&pkt->vec[VMXNET_TX_PKT_PL_START_FRAG], pkt->payload_frags,
|
||||||
|
pkt->virt_hdr.csum_offset, &csum, sizeof(csum));
|
||||||
|
}
|
||||||
|
|
||||||
|
static void vmxnet_tx_pkt_calculate_hdr_len(struct VmxnetTxPkt *pkt)
|
||||||
|
{
|
||||||
|
pkt->hdr_len = pkt->vec[VMXNET_TX_PKT_L2HDR_FRAG].iov_len +
|
||||||
|
pkt->vec[VMXNET_TX_PKT_L3HDR_FRAG].iov_len;
|
||||||
|
}
|
||||||
|
|
||||||
|
static bool vmxnet_tx_pkt_parse_headers(struct VmxnetTxPkt *pkt)
|
||||||
|
{
|
||||||
|
struct iovec *l2_hdr, *l3_hdr;
|
||||||
|
size_t bytes_read;
|
||||||
|
size_t full_ip6hdr_len;
|
||||||
|
uint16_t l3_proto;
|
||||||
|
|
||||||
|
assert(pkt);
|
||||||
|
|
||||||
|
l2_hdr = &pkt->vec[VMXNET_TX_PKT_L2HDR_FRAG];
|
||||||
|
l3_hdr = &pkt->vec[VMXNET_TX_PKT_L3HDR_FRAG];
|
||||||
|
|
||||||
|
bytes_read = iov_to_buf(pkt->raw, pkt->raw_frags, 0, l2_hdr->iov_base,
|
||||||
|
ETH_MAX_L2_HDR_LEN);
|
||||||
|
if (bytes_read < ETH_MAX_L2_HDR_LEN) {
|
||||||
|
l2_hdr->iov_len = 0;
|
||||||
|
return false;
|
||||||
|
} else {
|
||||||
|
l2_hdr->iov_len = eth_get_l2_hdr_length(l2_hdr->iov_base);
|
||||||
|
}
|
||||||
|
|
||||||
|
l3_proto = eth_get_l3_proto(l2_hdr->iov_base, l2_hdr->iov_len);
|
||||||
|
|
||||||
|
switch (l3_proto) {
|
||||||
|
case ETH_P_IP:
|
||||||
|
l3_hdr->iov_base = g_malloc(ETH_MAX_IP4_HDR_LEN);
|
||||||
|
|
||||||
|
bytes_read = iov_to_buf(pkt->raw, pkt->raw_frags, l2_hdr->iov_len,
|
||||||
|
l3_hdr->iov_base, sizeof(struct ip_header));
|
||||||
|
|
||||||
|
if (bytes_read < sizeof(struct ip_header)) {
|
||||||
|
l3_hdr->iov_len = 0;
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
|
||||||
|
l3_hdr->iov_len = IP_HDR_GET_LEN(l3_hdr->iov_base);
|
||||||
|
pkt->l4proto = ((struct ip_header *) l3_hdr->iov_base)->ip_p;
|
||||||
|
|
||||||
|
/* copy optional IPv4 header data */
|
||||||
|
bytes_read = iov_to_buf(pkt->raw, pkt->raw_frags,
|
||||||
|
l2_hdr->iov_len + sizeof(struct ip_header),
|
||||||
|
l3_hdr->iov_base + sizeof(struct ip_header),
|
||||||
|
l3_hdr->iov_len - sizeof(struct ip_header));
|
||||||
|
if (bytes_read < l3_hdr->iov_len - sizeof(struct ip_header)) {
|
||||||
|
l3_hdr->iov_len = 0;
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
break;
|
||||||
|
|
||||||
|
case ETH_P_IPV6:
|
||||||
|
if (!eth_parse_ipv6_hdr(pkt->raw, pkt->raw_frags, l2_hdr->iov_len,
|
||||||
|
&pkt->l4proto, &full_ip6hdr_len)) {
|
||||||
|
l3_hdr->iov_len = 0;
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
|
||||||
|
l3_hdr->iov_base = g_malloc(full_ip6hdr_len);
|
||||||
|
|
||||||
|
bytes_read = iov_to_buf(pkt->raw, pkt->raw_frags, l2_hdr->iov_len,
|
||||||
|
l3_hdr->iov_base, full_ip6hdr_len);
|
||||||
|
|
||||||
|
if (bytes_read < full_ip6hdr_len) {
|
||||||
|
l3_hdr->iov_len = 0;
|
||||||
|
return false;
|
||||||
|
} else {
|
||||||
|
l3_hdr->iov_len = full_ip6hdr_len;
|
||||||
|
}
|
||||||
|
break;
|
||||||
|
|
||||||
|
default:
|
||||||
|
l3_hdr->iov_len = 0;
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
|
||||||
|
vmxnet_tx_pkt_calculate_hdr_len(pkt);
|
||||||
|
pkt->packet_type = get_eth_packet_type(l2_hdr->iov_base);
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
|
||||||
|
static bool vmxnet_tx_pkt_rebuild_payload(struct VmxnetTxPkt *pkt)
|
||||||
|
{
|
||||||
|
size_t payload_len = iov_size(pkt->raw, pkt->raw_frags) - pkt->hdr_len;
|
||||||
|
|
||||||
|
pkt->payload_frags = iov_copy(&pkt->vec[VMXNET_TX_PKT_PL_START_FRAG],
|
||||||
|
pkt->max_payload_frags,
|
||||||
|
pkt->raw, pkt->raw_frags,
|
||||||
|
pkt->hdr_len, payload_len);
|
||||||
|
|
||||||
|
if (pkt->payload_frags != (uint32_t) -1) {
|
||||||
|
pkt->payload_len = payload_len;
|
||||||
|
return true;
|
||||||
|
} else {
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
bool vmxnet_tx_pkt_parse(struct VmxnetTxPkt *pkt)
|
||||||
|
{
|
||||||
|
return vmxnet_tx_pkt_parse_headers(pkt) &&
|
||||||
|
vmxnet_tx_pkt_rebuild_payload(pkt);
|
||||||
|
}
|
||||||
|
|
||||||
|
struct virtio_net_hdr *vmxnet_tx_pkt_get_vhdr(struct VmxnetTxPkt *pkt)
|
||||||
|
{
|
||||||
|
assert(pkt);
|
||||||
|
return &pkt->virt_hdr;
|
||||||
|
}
|
||||||
|
|
||||||
|
static uint8_t vmxnet_tx_pkt_get_gso_type(struct VmxnetTxPkt *pkt,
|
||||||
|
bool tso_enable)
|
||||||
|
{
|
||||||
|
uint8_t rc = VIRTIO_NET_HDR_GSO_NONE;
|
||||||
|
uint16_t l3_proto;
|
||||||
|
|
||||||
|
l3_proto = eth_get_l3_proto(pkt->vec[VMXNET_TX_PKT_L2HDR_FRAG].iov_base,
|
||||||
|
pkt->vec[VMXNET_TX_PKT_L2HDR_FRAG].iov_len);
|
||||||
|
|
||||||
|
if (!tso_enable) {
|
||||||
|
goto func_exit;
|
||||||
|
}
|
||||||
|
|
||||||
|
rc = eth_get_gso_type(l3_proto, pkt->vec[VMXNET_TX_PKT_L3HDR_FRAG].iov_base,
|
||||||
|
pkt->l4proto);
|
||||||
|
|
||||||
|
func_exit:
|
||||||
|
return rc;
|
||||||
|
}
|
||||||
|
|
||||||
|
void vmxnet_tx_pkt_build_vheader(struct VmxnetTxPkt *pkt, bool tso_enable,
|
||||||
|
bool csum_enable, uint32_t gso_size)
|
||||||
|
{
|
||||||
|
struct tcp_hdr l4hdr;
|
||||||
|
assert(pkt);
|
||||||
|
|
||||||
|
/* csum has to be enabled if tso is. */
|
||||||
|
assert(csum_enable || !tso_enable);
|
||||||
|
|
||||||
|
pkt->virt_hdr.gso_type = vmxnet_tx_pkt_get_gso_type(pkt, tso_enable);
|
||||||
|
|
||||||
|
switch (pkt->virt_hdr.gso_type & ~VIRTIO_NET_HDR_GSO_ECN) {
|
||||||
|
case VIRTIO_NET_HDR_GSO_NONE:
|
||||||
|
pkt->virt_hdr.hdr_len = 0;
|
||||||
|
pkt->virt_hdr.gso_size = 0;
|
||||||
|
break;
|
||||||
|
|
||||||
|
case VIRTIO_NET_HDR_GSO_UDP:
|
||||||
|
pkt->virt_hdr.gso_size = IP_FRAG_ALIGN_SIZE(gso_size);
|
||||||
|
pkt->virt_hdr.hdr_len = pkt->hdr_len + sizeof(struct udp_header);
|
||||||
|
break;
|
||||||
|
|
||||||
|
case VIRTIO_NET_HDR_GSO_TCPV4:
|
||||||
|
case VIRTIO_NET_HDR_GSO_TCPV6:
|
||||||
|
iov_to_buf(&pkt->vec[VMXNET_TX_PKT_PL_START_FRAG], pkt->payload_frags,
|
||||||
|
0, &l4hdr, sizeof(l4hdr));
|
||||||
|
pkt->virt_hdr.hdr_len = pkt->hdr_len + l4hdr.th_off * sizeof(uint32_t);
|
||||||
|
pkt->virt_hdr.gso_size = IP_FRAG_ALIGN_SIZE(gso_size);
|
||||||
|
break;
|
||||||
|
|
||||||
|
default:
|
||||||
|
assert(false);
|
||||||
|
}
|
||||||
|
|
||||||
|
if (csum_enable) {
|
||||||
|
switch (pkt->l4proto) {
|
||||||
|
case IP_PROTO_TCP:
|
||||||
|
pkt->virt_hdr.flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
|
||||||
|
pkt->virt_hdr.csum_start = pkt->hdr_len;
|
||||||
|
pkt->virt_hdr.csum_offset = offsetof(struct tcp_hdr, th_sum);
|
||||||
|
break;
|
||||||
|
case IP_PROTO_UDP:
|
||||||
|
pkt->virt_hdr.flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
|
||||||
|
pkt->virt_hdr.csum_start = pkt->hdr_len;
|
||||||
|
pkt->virt_hdr.csum_offset = offsetof(struct udp_hdr, uh_sum);
|
||||||
|
break;
|
||||||
|
default:
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
void vmxnet_tx_pkt_setup_vlan_header(struct VmxnetTxPkt *pkt, uint16_t vlan)
|
||||||
|
{
|
||||||
|
bool is_new;
|
||||||
|
assert(pkt);
|
||||||
|
|
||||||
|
eth_setup_vlan_headers(pkt->vec[VMXNET_TX_PKT_L2HDR_FRAG].iov_base,
|
||||||
|
vlan, &is_new);
|
||||||
|
|
||||||
|
/* update l2hdrlen */
|
||||||
|
if (is_new) {
|
||||||
|
pkt->hdr_len += sizeof(struct vlan_header);
|
||||||
|
pkt->vec[VMXNET_TX_PKT_L2HDR_FRAG].iov_len +=
|
||||||
|
sizeof(struct vlan_header);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
bool vmxnet_tx_pkt_add_raw_fragment(struct VmxnetTxPkt *pkt, hwaddr pa,
|
||||||
|
size_t len)
|
||||||
|
{
|
||||||
|
hwaddr mapped_len = 0;
|
||||||
|
struct iovec *ventry;
|
||||||
|
assert(pkt);
|
||||||
|
assert(pkt->max_raw_frags > pkt->raw_frags);
|
||||||
|
|
||||||
|
if (!len) {
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
|
||||||
|
ventry = &pkt->raw[pkt->raw_frags];
|
||||||
|
mapped_len = len;
|
||||||
|
|
||||||
|
ventry->iov_base = cpu_physical_memory_map(pa, &mapped_len, false);
|
||||||
|
ventry->iov_len = mapped_len;
|
||||||
|
pkt->raw_frags += !!ventry->iov_base;
|
||||||
|
|
||||||
|
if ((ventry->iov_base == NULL) || (len != mapped_len)) {
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
|
||||||
|
eth_pkt_types_e vmxnet_tx_pkt_get_packet_type(struct VmxnetTxPkt *pkt)
|
||||||
|
{
|
||||||
|
assert(pkt);
|
||||||
|
|
||||||
|
return pkt->packet_type;
|
||||||
|
}
|
||||||
|
|
||||||
|
size_t vmxnet_tx_pkt_get_total_len(struct VmxnetTxPkt *pkt)
|
||||||
|
{
|
||||||
|
assert(pkt);
|
||||||
|
|
||||||
|
return pkt->hdr_len + pkt->payload_len;
|
||||||
|
}
|
||||||
|
|
||||||
|
void vmxnet_tx_pkt_dump(struct VmxnetTxPkt *pkt)
|
||||||
|
{
|
||||||
|
#ifdef VMXNET_TX_PKT_DEBUG
|
||||||
|
assert(pkt);
|
||||||
|
|
||||||
|
printf("TX PKT: hdr_len: %d, pkt_type: 0x%X, l2hdr_len: %lu, "
|
||||||
|
"l3hdr_len: %lu, payload_len: %u\n", pkt->hdr_len, pkt->packet_type,
|
||||||
|
pkt->vec[VMXNET_TX_PKT_L2HDR_FRAG].iov_len,
|
||||||
|
pkt->vec[VMXNET_TX_PKT_L3HDR_FRAG].iov_len, pkt->payload_len);
|
||||||
|
#endif
|
||||||
|
}
|
||||||
|
|
||||||
|
void vmxnet_tx_pkt_reset(struct VmxnetTxPkt *pkt)
|
||||||
|
{
|
||||||
|
int i;
|
||||||
|
|
||||||
|
/* no assert, as reset can be called before tx_pkt_init */
|
||||||
|
if (!pkt) {
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
memset(&pkt->virt_hdr, 0, sizeof(pkt->virt_hdr));
|
||||||
|
|
||||||
|
g_free(pkt->vec[VMXNET_TX_PKT_L3HDR_FRAG].iov_base);
|
||||||
|
pkt->vec[VMXNET_TX_PKT_L3HDR_FRAG].iov_base = NULL;
|
||||||
|
|
||||||
|
assert(pkt->vec);
|
||||||
|
for (i = VMXNET_TX_PKT_L2HDR_FRAG;
|
||||||
|
i < pkt->payload_frags + VMXNET_TX_PKT_PL_START_FRAG; i++) {
|
||||||
|
pkt->vec[i].iov_len = 0;
|
||||||
|
}
|
||||||
|
pkt->payload_len = 0;
|
||||||
|
pkt->payload_frags = 0;
|
||||||
|
|
||||||
|
assert(pkt->raw);
|
||||||
|
for (i = 0; i < pkt->raw_frags; i++) {
|
||||||
|
assert(pkt->raw[i].iov_base);
|
||||||
|
cpu_physical_memory_unmap(pkt->raw[i].iov_base, pkt->raw[i].iov_len,
|
||||||
|
false, pkt->raw[i].iov_len);
|
||||||
|
pkt->raw[i].iov_len = 0;
|
||||||
|
}
|
||||||
|
pkt->raw_frags = 0;
|
||||||
|
|
||||||
|
pkt->hdr_len = 0;
|
||||||
|
pkt->packet_type = 0;
|
||||||
|
pkt->l4proto = 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void vmxnet_tx_pkt_do_sw_csum(struct VmxnetTxPkt *pkt)
|
||||||
|
{
|
||||||
|
struct iovec *iov = &pkt->vec[VMXNET_TX_PKT_L2HDR_FRAG];
|
||||||
|
uint32_t csum_cntr;
|
||||||
|
uint16_t csum = 0;
|
||||||
|
/* num of iovec without vhdr */
|
||||||
|
uint32_t iov_len = pkt->payload_frags + VMXNET_TX_PKT_PL_START_FRAG - 1;
|
||||||
|
uint16_t csl;
|
||||||
|
struct ip_header *iphdr;
|
||||||
|
size_t csum_offset = pkt->virt_hdr.csum_start + pkt->virt_hdr.csum_offset;
|
||||||
|
|
||||||
|
/* Put zero to checksum field */
|
||||||
|
iov_from_buf(iov, iov_len, csum_offset, &csum, sizeof csum);
|
||||||
|
|
||||||
|
/* Calculate L4 TCP/UDP checksum */
|
||||||
|
csl = pkt->payload_len;
|
||||||
|
|
||||||
|
/* data checksum */
|
||||||
|
csum_cntr =
|
||||||
|
net_checksum_add_iov(iov, iov_len, pkt->virt_hdr.csum_start, csl);
|
||||||
|
/* add pseudo header to csum */
|
||||||
|
iphdr = pkt->vec[VMXNET_TX_PKT_L3HDR_FRAG].iov_base;
|
||||||
|
csum_cntr += eth_calc_pseudo_hdr_csum(iphdr, csl);
|
||||||
|
|
||||||
|
/* Put the checksum obtained into the packet */
|
||||||
|
csum = cpu_to_be16(net_checksum_finish(csum_cntr));
|
||||||
|
iov_from_buf(iov, iov_len, csum_offset, &csum, sizeof csum);
|
||||||
|
}
|
||||||
|
|
||||||
|
enum {
|
||||||
|
VMXNET_TX_PKT_FRAGMENT_L2_HDR_POS = 0,
|
||||||
|
VMXNET_TX_PKT_FRAGMENT_L3_HDR_POS,
|
||||||
|
VMXNET_TX_PKT_FRAGMENT_HEADER_NUM
|
||||||
|
};
|
||||||
|
|
||||||
|
#define VMXNET_MAX_FRAG_SG_LIST (64)
|
||||||
|
|
||||||
|
static size_t vmxnet_tx_pkt_fetch_fragment(struct VmxnetTxPkt *pkt,
|
||||||
|
int *src_idx, size_t *src_offset, struct iovec *dst, int *dst_idx)
|
||||||
|
{
|
||||||
|
size_t fetched = 0;
|
||||||
|
struct iovec *src = pkt->vec;
|
||||||
|
|
||||||
|
*dst_idx = VMXNET_TX_PKT_FRAGMENT_HEADER_NUM;
|
||||||
|
|
||||||
|
while (fetched < pkt->virt_hdr.gso_size) {
|
||||||
|
|
||||||
|
/* no more place in fragment iov */
|
||||||
|
if (*dst_idx == VMXNET_MAX_FRAG_SG_LIST) {
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* no more data in iovec */
|
||||||
|
if (*src_idx == (pkt->payload_frags + VMXNET_TX_PKT_PL_START_FRAG)) {
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
dst[*dst_idx].iov_base = src[*src_idx].iov_base + *src_offset;
|
||||||
|
dst[*dst_idx].iov_len = MIN(src[*src_idx].iov_len - *src_offset,
|
||||||
|
pkt->virt_hdr.gso_size - fetched);
|
||||||
|
|
||||||
|
*src_offset += dst[*dst_idx].iov_len;
|
||||||
|
fetched += dst[*dst_idx].iov_len;
|
||||||
|
|
||||||
|
if (*src_offset == src[*src_idx].iov_len) {
|
||||||
|
*src_offset = 0;
|
||||||
|
(*src_idx)++;
|
||||||
|
}
|
||||||
|
|
||||||
|
(*dst_idx)++;
|
||||||
|
}
|
||||||
|
|
||||||
|
return fetched;
|
||||||
|
}
|
||||||
|
|
||||||
|
static bool vmxnet_tx_pkt_do_sw_fragmentation(struct VmxnetTxPkt *pkt,
|
||||||
|
NetClientState *nc)
|
||||||
|
{
|
||||||
|
struct iovec fragment[VMXNET_MAX_FRAG_SG_LIST];
|
||||||
|
size_t fragment_len = 0;
|
||||||
|
bool more_frags = false;
|
||||||
|
|
||||||
|
/* some pointers for shorter code */
|
||||||
|
void *l2_iov_base, *l3_iov_base;
|
||||||
|
size_t l2_iov_len, l3_iov_len;
|
||||||
|
int src_idx = VMXNET_TX_PKT_PL_START_FRAG, dst_idx;
|
||||||
|
size_t src_offset = 0;
|
||||||
|
size_t fragment_offset = 0;
|
||||||
|
|
||||||
|
l2_iov_base = pkt->vec[VMXNET_TX_PKT_L2HDR_FRAG].iov_base;
|
||||||
|
l2_iov_len = pkt->vec[VMXNET_TX_PKT_L2HDR_FRAG].iov_len;
|
||||||
|
l3_iov_base = pkt->vec[VMXNET_TX_PKT_L3HDR_FRAG].iov_base;
|
||||||
|
l3_iov_len = pkt->vec[VMXNET_TX_PKT_L3HDR_FRAG].iov_len;
|
||||||
|
|
||||||
|
/* Copy headers */
|
||||||
|
fragment[VMXNET_TX_PKT_FRAGMENT_L2_HDR_POS].iov_base = l2_iov_base;
|
||||||
|
fragment[VMXNET_TX_PKT_FRAGMENT_L2_HDR_POS].iov_len = l2_iov_len;
|
||||||
|
fragment[VMXNET_TX_PKT_FRAGMENT_L3_HDR_POS].iov_base = l3_iov_base;
|
||||||
|
fragment[VMXNET_TX_PKT_FRAGMENT_L3_HDR_POS].iov_len = l3_iov_len;
|
||||||
|
|
||||||
|
|
||||||
|
/* Put as much data as possible and send */
|
||||||
|
do {
|
||||||
|
fragment_len = vmxnet_tx_pkt_fetch_fragment(pkt, &src_idx, &src_offset,
|
||||||
|
fragment, &dst_idx);
|
||||||
|
|
||||||
|
more_frags = (fragment_offset + fragment_len < pkt->payload_len);
|
||||||
|
|
||||||
|
eth_setup_ip4_fragmentation(l2_iov_base, l2_iov_len, l3_iov_base,
|
||||||
|
l3_iov_len, fragment_len, fragment_offset, more_frags);
|
||||||
|
|
||||||
|
eth_fix_ip4_checksum(l3_iov_base, l3_iov_len);
|
||||||
|
|
||||||
|
qemu_sendv_packet(nc, fragment, dst_idx);
|
||||||
|
|
||||||
|
fragment_offset += fragment_len;
|
||||||
|
|
||||||
|
} while (more_frags);
|
||||||
|
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
|
||||||
|
bool vmxnet_tx_pkt_send(struct VmxnetTxPkt *pkt, NetClientState *nc)
|
||||||
|
{
|
||||||
|
assert(pkt);
|
||||||
|
|
||||||
|
if (!pkt->has_virt_hdr &&
|
||||||
|
pkt->virt_hdr.flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) {
|
||||||
|
vmxnet_tx_pkt_do_sw_csum(pkt);
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Since underlying infrastructure does not support IP datagrams longer
|
||||||
|
* than 64K we should drop such packets and don't even try to send
|
||||||
|
*/
|
||||||
|
if (VIRTIO_NET_HDR_GSO_NONE != pkt->virt_hdr.gso_type) {
|
||||||
|
if (pkt->payload_len >
|
||||||
|
ETH_MAX_IP_DGRAM_LEN -
|
||||||
|
pkt->vec[VMXNET_TX_PKT_L3HDR_FRAG].iov_len) {
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
if (pkt->has_virt_hdr ||
|
||||||
|
pkt->virt_hdr.gso_type == VIRTIO_NET_HDR_GSO_NONE) {
|
||||||
|
qemu_sendv_packet(nc, pkt->vec,
|
||||||
|
pkt->payload_frags + VMXNET_TX_PKT_PL_START_FRAG);
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
|
||||||
|
return vmxnet_tx_pkt_do_sw_fragmentation(pkt, nc);
|
||||||
|
}
|
148
hw/vmxnet_tx_pkt.h
Normal file
148
hw/vmxnet_tx_pkt.h
Normal file
@ -0,0 +1,148 @@
|
|||||||
|
/*
|
||||||
|
* QEMU VMWARE VMXNET* paravirtual NICs - 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 VMXNET_TX_PKT_H
|
||||||
|
#define VMXNET_TX_PKT_H
|
||||||
|
|
||||||
|
#include "stdint.h"
|
||||||
|
#include "stdbool.h"
|
||||||
|
#include "net/eth.h"
|
||||||
|
#include "exec/hwaddr.h"
|
||||||
|
|
||||||
|
/* define to enable packet dump functions */
|
||||||
|
/*#define VMXNET_TX_PKT_DEBUG*/
|
||||||
|
|
||||||
|
struct VmxnetTxPkt;
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Init function for tx packet functionality
|
||||||
|
*
|
||||||
|
* @pkt: packet pointer
|
||||||
|
* @max_frags: max tx ip fragments
|
||||||
|
* @has_virt_hdr: device uses virtio header.
|
||||||
|
*/
|
||||||
|
void vmxnet_tx_pkt_init(struct VmxnetTxPkt **pkt, uint32_t max_frags,
|
||||||
|
bool has_virt_hdr);
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Clean all tx packet resources.
|
||||||
|
*
|
||||||
|
* @pkt: packet.
|
||||||
|
*/
|
||||||
|
void vmxnet_tx_pkt_uninit(struct VmxnetTxPkt *pkt);
|
||||||
|
|
||||||
|
/**
|
||||||
|
* get virtio header
|
||||||
|
*
|
||||||
|
* @pkt: packet
|
||||||
|
* @ret: virtio header
|
||||||
|
*/
|
||||||
|
struct virtio_net_hdr *vmxnet_tx_pkt_get_vhdr(struct VmxnetTxPkt *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
|
||||||
|
*
|
||||||
|
*/
|
||||||
|
void vmxnet_tx_pkt_build_vheader(struct VmxnetTxPkt *pkt, bool tso_enable,
|
||||||
|
bool csum_enable, uint32_t gso_size);
|
||||||
|
|
||||||
|
/**
|
||||||
|
* updates vlan tag, and adds vlan header in case it is missing
|
||||||
|
*
|
||||||
|
* @pkt: packet
|
||||||
|
* @vlan: VLAN tag
|
||||||
|
*
|
||||||
|
*/
|
||||||
|
void vmxnet_tx_pkt_setup_vlan_header(struct VmxnetTxPkt *pkt, uint16_t vlan);
|
||||||
|
|
||||||
|
/**
|
||||||
|
* populate data fragment into pkt context.
|
||||||
|
*
|
||||||
|
* @pkt: packet
|
||||||
|
* @pa: physical address of fragment
|
||||||
|
* @len: length of fragment
|
||||||
|
*
|
||||||
|
*/
|
||||||
|
bool vmxnet_tx_pkt_add_raw_fragment(struct VmxnetTxPkt *pkt, hwaddr pa,
|
||||||
|
size_t len);
|
||||||
|
|
||||||
|
/**
|
||||||
|
* fix ip header fields and calculate checksums needed.
|
||||||
|
*
|
||||||
|
* @pkt: packet
|
||||||
|
*
|
||||||
|
*/
|
||||||
|
void vmxnet_tx_pkt_update_ip_checksums(struct VmxnetTxPkt *pkt);
|
||||||
|
|
||||||
|
/**
|
||||||
|
* get length of all populated data.
|
||||||
|
*
|
||||||
|
* @pkt: packet
|
||||||
|
* @ret: total data length
|
||||||
|
*
|
||||||
|
*/
|
||||||
|
size_t vmxnet_tx_pkt_get_total_len(struct VmxnetTxPkt *pkt);
|
||||||
|
|
||||||
|
/**
|
||||||
|
* get packet type
|
||||||
|
*
|
||||||
|
* @pkt: packet
|
||||||
|
* @ret: packet type
|
||||||
|
*
|
||||||
|
*/
|
||||||
|
eth_pkt_types_e vmxnet_tx_pkt_get_packet_type(struct VmxnetTxPkt *pkt);
|
||||||
|
|
||||||
|
/**
|
||||||
|
* prints packet data if debug is enabled
|
||||||
|
*
|
||||||
|
* @pkt: packet
|
||||||
|
*
|
||||||
|
*/
|
||||||
|
void vmxnet_tx_pkt_dump(struct VmxnetTxPkt *pkt);
|
||||||
|
|
||||||
|
/**
|
||||||
|
* reset tx packet private context (needed to be called between packets)
|
||||||
|
*
|
||||||
|
* @pkt: packet
|
||||||
|
*
|
||||||
|
*/
|
||||||
|
void vmxnet_tx_pkt_reset(struct VmxnetTxPkt *pkt);
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Send packet to qemu. handles sw offloads if vhdr is not supported.
|
||||||
|
*
|
||||||
|
* @pkt: packet
|
||||||
|
* @nc: NetClientState
|
||||||
|
* @ret: operation result
|
||||||
|
*
|
||||||
|
*/
|
||||||
|
bool vmxnet_tx_pkt_send(struct VmxnetTxPkt *pkt, NetClientState *nc);
|
||||||
|
|
||||||
|
/**
|
||||||
|
* parse raw packet data and analyze offload requirements.
|
||||||
|
*
|
||||||
|
* @pkt: packet
|
||||||
|
*
|
||||||
|
*/
|
||||||
|
bool vmxnet_tx_pkt_parse(struct VmxnetTxPkt *pkt);
|
||||||
|
|
||||||
|
#endif
|
Loading…
Reference in New Issue
Block a user