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vr_interface.c
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vr_interface.c
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/*
* vr_interface.c -- router interface management
*
* Copyright (c) 2013 Juniper Networks, Inc. All rights reserved.
*/
#include <vr_os.h>
#include <vr_types.h>
#include <vr_packet.h>
#include <vr_interface.h>
#include "vr_message.h"
#include "vr_sandesh.h"
#include "vr_mirror.h"
#include "vr_htable.h"
#include "vr_datapath.h"
#include "vr_bridge.h"
volatile bool agent_alive = false;
static struct vr_host_interface_ops *hif_ops;
static int vm_srx(struct vr_interface *, struct vr_packet *, unsigned short);
static int vm_rx(struct vr_interface *, struct vr_packet *, unsigned short);
static int eth_rx(struct vr_interface *, struct vr_packet *, unsigned short);
static mac_response_t vm_mac_request(struct vr_interface *, struct vr_packet *,
struct vr_forwarding_md *, unsigned char *);
void vif_attach(struct vr_interface *);
void vif_detach(struct vr_interface *);
int vr_gro_vif_add(struct vrouter *, unsigned int, char *, unsigned short);
struct vr_interface_stats *vif_get_stats(struct vr_interface *, unsigned short);
struct vr_interface *__vrouter_get_interface_os(struct vrouter *, unsigned int);
extern struct vr_host_interface_ops *vr_host_interface_init(void);
extern void vr_host_interface_exit(void);
extern void vr_host_vif_init(struct vrouter *);
extern struct vr_interface *vif_bridge_get_sub_interface(vr_htable_t,
unsigned short, unsigned char *);
extern int vif_bridge_get_index(struct vr_interface *, struct vr_interface *);
extern int vif_bridge_init(struct vr_interface *);
extern void vif_bridge_deinit(struct vr_interface *);
extern int vif_bridge_delete(struct vr_interface *, struct vr_interface *);
extern int vif_bridge_add(struct vr_interface *, struct vr_interface *);
extern void vhost_remove_xconnect(void);
#define MINIMUM(a, b) (((a) < (b)) ? (a) : (b))
struct vr_interface_stats *
vif_get_stats(struct vr_interface *vif, unsigned short cpu)
{
return &vif->vif_stats[cpu & VR_CPU_MASK];
}
static int
vif_discard_tx(struct vr_interface *vif, struct vr_packet *pkt,
struct vr_forwarding_md *fmd)
{
vr_pfree(pkt, VP_DROP_INTERFACE_TX_DISCARD);
return 0;
}
static int
vif_discard_rx(struct vr_interface *vif, struct vr_packet *pkt,
unsigned short vlan_id __attribute__((unused)))
{
vr_pfree(pkt, VP_DROP_INTERFACE_RX_DISCARD);
return 0;
}
void
vif_drop_pkt(struct vr_interface *vif, struct vr_packet *pkt, bool input)
{
struct vr_interface_stats *stats = vif_get_stats(vif, pkt->vp_cpu);
if (input)
stats->vis_ierrors++;
else
stats->vis_oerrors++;
vr_pfree(pkt, VP_DROP_INTERFACE_DROP);
return;
}
/*
* in the rewrite case, we will assume the positive case of caller
* passing us valid rewrite ptr and len and will not check for those
*/
static unsigned char *
vif_cmn_rewrite(struct vr_interface *vif, struct vr_packet *pkt,
struct vr_forwarding_md *fmd, unsigned char *rewrite,
unsigned short len)
{
unsigned char *head;
if (!len)
return pkt_data(pkt);
if (pkt_head_space(pkt) < len) {
pkt = vr_pexpand_head(pkt, len - pkt_head_space(pkt));
if (!pkt)
return NULL;
}
head = pkt_push(pkt, len);
if (!head)
return NULL;
memcpy(head, rewrite, len);
return head;
}
static int
vr_interface_service_enable(struct vr_interface *vif)
{
int i;
/*
* handle the case of existing vrf assign table, which
* was not freed because the table was not empty. also,
* note that for existing vrf table, we do not reset the
* entries and the table users count, as per requirements
* from agent
*/
if (!vif->vif_vrf_table) {
vif->vif_vrf_table = vr_malloc(sizeof(struct vr_vrf_assign) *
VIF_VRF_TABLE_ENTRIES);
if (!vif->vif_vrf_table)
return -ENOMEM;
for (i = 0; i < VIF_VRF_TABLE_ENTRIES; i++) {
vif->vif_vrf_table[i].va_vrf = -1;
vif->vif_vrf_table[i].va_nh_id = 0;
}
/* for the new table, there are no users */
vif->vif_vrf_table_users = 0;
}
vif->vif_rx = vm_srx;
return 0;
}
static void
vr_interface_service_disable(struct vr_interface *vif)
{
if (vif_is_virtual(vif))
vif->vif_rx = vm_rx;
else
vif->vif_rx = eth_rx;
/*
* once everybody sees the change, we are free to do whatever
* we want with the vrf assign table
*/
if (!vr_not_ready)
vr_delay_op();
/*
* it is possible that when this function is called from
* interface delete, the table users are +ve, and hence
* the memory will not be freed here. our saving grace
* is vif_free (called from last put operation), which
* takes care of freeing the memory
*/
if (vif->vif_vrf_table && !vif->vif_vrf_table_users) {
vr_free(vif->vif_vrf_table);
vif->vif_vrf_table = NULL;
}
return;
}
/*
* xconnect mode
*
* xconnect mode, as of now, is relevant only for physical (ethX) and vhost
* interfaces. the purpose of xconnect mode is to make sure that the host
* management interface does not lose connectivity to network when agent is
* either not started or not alive.
*
* the xconnect mode works differently in different devices. since for ethernet
* interfaces, we would still like to process all packets destined to VMs,
* packets will have to be processed by the vrouter stack. however, for vhost
* interfaces, we just need the packets to be pushed to ethernet interface,
* and hence the packets are switched to the corresponding physical interface
*/
void
vif_set_xconnect(struct vr_interface *vif)
{
if (!vif)
return;
vif->vif_flags |= VIF_FLAG_XCONNECT;
return;
}
void
vif_remove_xconnect(struct vr_interface *vif)
{
if (!vif)
return;
vif->vif_flags &= ~VIF_FLAG_XCONNECT;
return;
}
int
vif_xconnect(struct vr_interface *vif, struct vr_packet *pkt,
struct vr_forwarding_md *fmd)
{
struct vr_interface *bridge;
if (!vif)
goto free_pkt;
bridge = vif->vif_bridge;
if (bridge) {
vr_preset(pkt);
return bridge->vif_tx(bridge, pkt, fmd);
}
free_pkt:
if (vif)
vif_drop_pkt(vif, pkt, 1);
return 0;
}
/* agent driver */
#define AGENT_PKT_HEAD_SPACE (sizeof(struct vr_eth) + \
sizeof(struct agent_hdr))
static unsigned char *
agent_set_rewrite(struct vr_interface *vif, struct vr_packet *pkt,
struct vr_forwarding_md *fmd, unsigned char *rewrite,
unsigned short len)
{
unsigned char *head;
unsigned int hdr_len;
struct agent_hdr *hdr;
vr_preset(pkt);
hdr_len = sizeof(struct agent_hdr) + len;
if (pkt_head_space(pkt) < hdr_len) {
pkt = vr_pexpand_head(pkt, hdr_len - pkt_head_space(pkt));
if (!pkt)
return NULL;
}
head = pkt_push(pkt, hdr_len);
if (!head)
return NULL;
/* copy the rewrite first */
memcpy(head, rewrite, len);
hdr = (struct agent_hdr *)(head + len);
hdr->hdr_ifindex = htons(pkt->vp_if->vif_idx);
hdr->hdr_vrf = htons(fmd->fmd_dvrf);
/* this needs some thought */
hdr->hdr_cmd = htons(AGENT_TRAP_NEXTHOP);
hdr->hdr_cmd_param = 0;
return head;
}
static int
agent_rx(struct vr_interface *vif, struct vr_packet *pkt,
unsigned short vlan_id __attribute__((unused)))
{
unsigned short cmd;
struct agent_hdr *hdr;
struct vr_interface *agent_vif;
struct vr_forwarding_md fmd;
struct vr_interface_stats *stats = vif_get_stats(vif, pkt->vp_cpu);
stats->vis_ibytes += pkt_len(pkt);
stats->vis_ipackets++;
hdr = (struct agent_hdr *)pkt_pull(pkt, sizeof(struct vr_eth));
if (!hdr || !pkt_pull(pkt, sizeof(*hdr))) {
stats->vis_ierrors++;
vr_pfree(pkt, VP_DROP_PULL);
return 0;
}
/*
* Update the original (OS visible) packet to point to the
* l2 header of the injected packet
*/
vr_pset_data(pkt, pkt->vp_data);
cmd = ntohs(hdr->hdr_cmd);
switch (cmd) {
case AGENT_CMD_ROUTE:
/*
* XXX
* Packet with command "route" from agent may
* result in flow setup, this breaks the
* assumption that all packets for a flow will
* reach same CPU. Need a better way to handle this
*/
agent_vif = __vrouter_get_interface(vrouter_get(0),
ntohs(hdr->hdr_ifindex));
if (!agent_vif) {
agent_vif = vif;
}
pkt->vp_if = agent_vif;
if (ntohl(hdr->hdr_cmd_param) == CMD_PARAM_PACKET_CTRL) {
if (ntohl(hdr->hdr_cmd_param_1) == CMD_PARAM_1_DIAG) {
pkt->vp_flags |= VP_FLAG_DIAG;
}
}
vr_virtual_input(ntohs(hdr->hdr_vrf), agent_vif, pkt, VLAN_ID_INVALID);
break;
case AGENT_CMD_SWITCH:
vif = __vrouter_get_interface(vrouter_get(0), ntohs(hdr->hdr_ifindex));
if (!vif) {
stats->vis_ierrors++;
vr_pfree(pkt, VP_DROP_INVALID_IF);
return 0;
}
vr_init_forwarding_md(&fmd);
fmd.fmd_dvrf = ntohs(hdr->hdr_vrf);
pkt->vp_type = VP_TYPE_AGENT;
pkt_set_network_header(pkt, pkt->vp_data + sizeof(struct vr_eth));
pkt_set_inner_network_header(pkt,
pkt->vp_data + sizeof(struct vr_eth));
return vif->vif_tx(vif, pkt, &fmd);
break;
default:
vr_pfree(pkt, VP_DROP_INVALID_PACKET);
break;
}
return 0;
}
static int
agent_tx(struct vr_interface *vif, struct vr_packet *pkt,
struct vr_forwarding_md *fmd)
{
int ret;
struct vr_interface_stats *stats = vif_get_stats(vif, pkt->vp_cpu);
stats->vis_obytes += pkt_len(pkt);
stats->vis_opackets++;
ret = hif_ops->hif_tx(vif, pkt);
if (ret != 0) {
ret = 0;
stats->vis_oerrors++;
}
return ret;
}
/*
* Return true if the packet may be truncated.
*/
static int
agent_trap_may_truncate(int trap_reason)
{
switch (trap_reason) {
case AGENT_TRAP_NEXTHOP:
case AGENT_TRAP_RESOLVE:
case AGENT_TRAP_FLOW_MISS:
case AGENT_TRAP_ECMP_RESOLVE:
case AGENT_TRAP_HANDLE_DF:
case AGENT_TRAP_ZERO_TTL:
return 1;
case AGENT_TRAP_ARP:
case AGENT_TRAP_L2_PROTOCOLS:
case AGENT_TRAP_L3_PROTOCOLS:
case AGENT_TRAP_DIAG:
default:
return 0;
}
}
static int
agent_send(struct vr_interface *vif, struct vr_packet *pkt,
void *ifspecific)
{
unsigned short encap = VIF_ENCAP_TYPE_ETHER;
int len, head_space;
struct vr_eth *eth;
struct vr_forwarding_md fmd;
struct agent_hdr *hdr;
unsigned char *rewrite;
struct vr_interface_stats *stats = vif_get_stats(vif, pkt->vp_cpu);
struct vr_packet *pkt_c;
struct agent_send_params *params =
(struct agent_send_params *)ifspecific;
struct vr_flow_trap_arg *fta;
struct vr_df_trap_arg *dta;
bool truncate = false;
vr_preset(pkt);
if ((params->trap_reason == AGENT_TRAP_HANDLE_DF) ||
(params->trap_reason == AGENT_TRAP_ZERO_TTL)) {
if (pkt_len(pkt) > VR_AGENT_MIN_PACKET_LEN)
truncate = true;
}
if (hif_ops->hif_get_encap)
encap = hif_ops->hif_get_encap(pkt->vp_if);
head_space = AGENT_PKT_HEAD_SPACE;
if (encap == VIF_ENCAP_TYPE_L3)
head_space += VR_ETHER_HLEN;
if (truncate || (pkt_head_space(pkt) < head_space)) {
len = pkt_len(pkt);
if (agent_trap_may_truncate(params->trap_reason)) {
len = MINIMUM(len, VR_AGENT_MIN_PACKET_LEN);
}
pkt_c = pkt_copy(pkt, 0, len);
if (pkt_c) {
vr_pfree(pkt, VP_DROP_DUPLICATED);
pkt = pkt_c;
}
}
pkt->vp_type = VP_TYPE_AGENT;
if (encap == VIF_ENCAP_TYPE_L3) {
eth = (struct vr_eth *)(pkt_push(pkt, VR_ETHER_HLEN));
if (!eth)
goto drop;
memcpy(eth->eth_dmac, vif->vif_mac, VR_ETHER_ALEN);
memcpy(eth->eth_smac, vif->vif_mac, VR_ETHER_ALEN);
if (pkt->vp_type == VP_TYPE_IP6)
eth->eth_proto = htons(VR_ETH_PROTO_IP6);
else
eth->eth_proto = htons(VR_ETH_PROTO_IP);
}
pkt_set_network_header(pkt, pkt->vp_data + sizeof(struct vr_eth));
pkt_set_inner_network_header(pkt,
pkt->vp_data + sizeof(struct vr_eth));
hdr = (struct agent_hdr *)pkt_push(pkt, sizeof(struct agent_hdr));
if (!hdr)
goto drop;
hdr->hdr_ifindex = htons(pkt->vp_if->vif_idx);
hdr->hdr_vrf = htons(params->trap_vrf);
hdr->hdr_cmd = htons(params->trap_reason);
switch (params->trap_reason) {
case AGENT_TRAP_FLOW_MISS:
if (params->trap_param) {
fta = (struct vr_flow_trap_arg *)(params->trap_param);
hdr->hdr_cmd_param = htonl(fta->vfta_index);
hdr->hdr_cmd_param_1 = htonl(fta->vfta_nh_index);
}
break;
case AGENT_TRAP_ECMP_RESOLVE:
case AGENT_TRAP_SOURCE_MISMATCH:
if (params->trap_param)
hdr->hdr_cmd_param = htonl(*(unsigned int *)(params->trap_param));
break;
case AGENT_TRAP_DIAG:
if (params->trap_param)
hdr->hdr_cmd_param = htonl(*(unsigned int *)(params->trap_param));
break;
case AGENT_TRAP_HANDLE_DF:
dta = (struct vr_df_trap_arg *)(params->trap_param);
hdr->hdr_cmd_param = htonl(dta->df_mtu);
hdr->hdr_cmd_param_1 = htonl(dta->df_flow_index);
break;
default:
hdr->hdr_cmd_param = 0;
hdr->hdr_cmd_param_1 = 0;
break;
}
rewrite = pkt_push(pkt, VR_ETHER_HLEN);
if (!rewrite)
goto drop;
memcpy(rewrite, vif->vif_rewrite, VR_ETHER_HLEN);
vr_init_forwarding_md(&fmd);
return vif->vif_tx(vif, pkt, &fmd);
drop:
stats->vis_oerrors++;
vr_pfree(pkt, VP_DROP_PUSH);
return 0;
}
static int
agent_drv_del(struct vr_interface *vif)
{
hif_ops->hif_del_tap(vif);
vif->vif_tx = vif_discard_tx;
vif->vif_rx = vif_discard_rx;
return hif_ops->hif_del(vif);
}
static int
agent_drv_add(struct vr_interface *vif,
vr_interface_req *vifr __attribute__((unused)))
{
int ret;
if (!vif->vif_mtu)
vif->vif_mtu = 1514;
vif->vif_set_rewrite = agent_set_rewrite;
vif->vif_tx = agent_tx;
vif->vif_rx = agent_rx;
vif->vif_send = agent_send;
ret = hif_ops->hif_add(vif);
if (ret) {
return ret;
}
ret = hif_ops->hif_add_tap(vif);
if (ret)
hif_ops->hif_del(vif);
return ret;
}
/* end agent driver */
/* vhost driver */
static mac_response_t
vhost_mac_request(struct vr_interface *vif, struct vr_packet *pkt,
struct vr_forwarding_md *fmd, unsigned char *dmac)
{
struct vr_arp *sarp;
if (pkt->vp_type == VP_TYPE_ARP) {
sarp = (struct vr_arp *)pkt_data(pkt);
if (IS_LINK_LOCAL_IP(sarp->arp_dpa) ||
(vif->vif_type == VIF_TYPE_GATEWAY)) {
VR_MAC_COPY(dmac, vif->vif_mac);
return MR_PROXY;
}
}
if (vif->vif_type == VIF_TYPE_GATEWAY)
return MR_DROP;
return MR_XCONNECT;
}
static int
vhost_rx(struct vr_interface *vif, struct vr_packet *pkt,
unsigned short vlan_id __attribute__((unused)))
{
struct vr_forwarding_md fmd;
struct vr_interface_stats *stats = vif_get_stats(vif, pkt->vp_cpu);
stats->vis_ibytes += pkt_len(pkt);
stats->vis_ipackets++;
/* please see the text on xconnect mode */
vr_init_forwarding_md(&fmd);
fmd.fmd_dvrf = vif->vif_vrf;
if (vif_mode_xconnect(vif))
return vif_xconnect(vif, pkt, &fmd);
return vr_fabric_input(vif, pkt, vlan_id);
}
static int
vhost_tx(struct vr_interface *vif, struct vr_packet *pkt,
struct vr_forwarding_md *fmd)
{
int ret;
struct vr_interface_stats *stats = vif_get_stats(vif, pkt->vp_cpu);
unsigned short eth_proto, pull_len = 0;
unsigned char *new_eth, *eth;
struct vr_eth *eth_hdr;
struct vr_vlan_hdr *vlan;
struct vr_interface *in_vif;
stats->vis_obytes += pkt_len(pkt);
stats->vis_opackets++;
if (vif->vif_type == VIF_TYPE_XEN_LL_HOST)
memcpy(pkt_data(pkt), vif->vif_mac, sizeof(vif->vif_mac));
else if (vif->vif_type == VIF_TYPE_HOST) {
in_vif = pkt->vp_if;
if (!hif_ops->hif_get_encap ||
(hif_ops->hif_get_encap(in_vif) == VIF_ENCAP_TYPE_ETHER)) {
/* Untag any tagged packets */
eth = pkt_data(pkt);
eth_proto = ntohs(*(unsigned short *)(eth + VR_ETHER_PROTO_OFF));
while (eth_proto == VR_ETH_PROTO_VLAN) {
vlan = (struct vr_vlan_hdr *)(pkt_data(pkt) + pull_len +
VR_ETHER_HLEN);
eth_proto = ntohs(vlan->vlan_proto);
pull_len += sizeof(*vlan);
}
/* If there are any vlan tags */
if (pull_len) {
new_eth = pkt_pull(pkt, pull_len);
if (!new_eth) {
vr_pfree(pkt, VP_DROP_PULL);
return 0;
}
memmove(new_eth, eth, (2 * VR_ETHER_ALEN));
}
} else {
eth_hdr = (struct vr_eth *)pkt_push(pkt, VR_ETHER_HLEN);
memcpy(eth_hdr->eth_dmac, vif->vif_mac, VR_ETHER_ALEN);
memcpy(eth_hdr->eth_smac, vif->vif_mac, VR_ETHER_ALEN);
if (pkt->vp_type == VP_TYPE_IP6)
eth_hdr->eth_proto = htons(VR_ETH_PROTO_IP6);
else
eth_hdr->eth_proto = htons(VR_ETH_PROTO_IP);
}
}
ret = hif_ops->hif_rx(vif, pkt);
if (ret < 0) {
ret = 0;
stats->vis_oerrors++;
}
return ret;
}
static int
vhost_drv_del(struct vr_interface *vif)
{
vif->vif_tx = vif_discard_tx;
vif->vif_rx = vif_discard_rx;
return hif_ops->hif_del(vif);
}
static int
vhost_drv_add(struct vr_interface *vif,
vr_interface_req *vifr __attribute__((unused)))
{
int ret = 0;
if (!vif->vif_os_idx)
return -EINVAL;
if (!vif->vif_mtu)
vif->vif_mtu = 1514;
vif->vif_set_rewrite = vif_cmn_rewrite;
vif->vif_tx = vhost_tx;
vif->vif_rx = vhost_rx;
vif->vif_mac_request = vhost_mac_request;
ret = hif_ops->hif_add(vif);
if (ret)
return ret;
/*
* add tap to the corresponding physical interface, now
* that vhost is functional
*/
if (vif->vif_bridge) {
ret = hif_ops->hif_add_tap(vif->vif_bridge);
if (ret)
return ret;
}
return 0;
}
/* end vhost driver */
/* vlan driver */
static int
vlan_rx(struct vr_interface *vif, struct vr_packet *pkt,
unsigned short vlan_id __attribute__((unused)))
{
struct vr_interface_stats *stats = vif_get_stats(vif, pkt->vp_cpu);
pkt->vp_if = vif;
stats->vis_ibytes += pkt_len(pkt);
stats->vis_ipackets++;
if (vr_untag_pkt(pkt)) {
stats->vis_ierrors++;
vr_pfree(pkt, VP_DROP_PULL);
return 0;
}
vr_pset_data(pkt, pkt->vp_data);
return vr_virtual_input(vif->vif_vrf, vif, pkt, VLAN_ID_INVALID);
}
static int
vlan_tx(struct vr_interface *vif, struct vr_packet *pkt,
struct vr_forwarding_md *fmd)
{
int ret = 0;
struct vr_interface *pvif;
struct vr_interface_stats *stats = vif_get_stats(vif, pkt->vp_cpu);
if (!(pkt->vp_flags & VP_FLAG_GRO)) {
stats->vis_obytes += pkt_len(pkt);
stats->vis_opackets++;
}
fmd->fmd_vlan = vif->vif_vlan_id;
if (vif_is_vlan(vif) && vif->vif_ovlan_id) {
fmd->fmd_vlan = vif->vif_ovlan_id;
if (vr_tag_pkt(pkt, vif->vif_ovlan_id)) {
goto drop;
}
vr_pset_data(pkt, pkt->vp_data);
}
pvif = vif->vif_parent;
if (!pvif)
goto drop;
ret = pvif->vif_tx(pvif, pkt, fmd);
if (ret < 0) {
ret = 0;
goto drop;
}
return ret;
drop:
vr_pfree(pkt, VP_DROP_INVALID_IF);
stats->vis_oerrors++;
return ret;
}
static int
vlan_drv_del(struct vr_interface *vif)
{
struct vr_interface *pvif;
pvif = vif->vif_parent;
if (!pvif)
return 0;
if (pvif->vif_driver->drv_delete_sub_interface)
pvif->vif_driver->drv_delete_sub_interface(pvif, vif);
return 0;
}
static int
vlan_drv_add(struct vr_interface *vif, vr_interface_req *vifr)
{
struct vr_interface *pvif = NULL;
if ((unsigned int)(vifr->vifr_parent_vif_idx) > VR_MAX_INTERFACES)
return -EINVAL;
if (((unsigned short)(vifr->vifr_vlan_id) >= VLAN_ID_MAX) ||
((unsigned short)(vifr->vifr_ovlan_id) >= VLAN_ID_MAX))
return -EINVAL;
if (vifr->vifr_src_mac_size && vifr->vifr_src_mac) {
if (vifr->vifr_src_mac_size != VR_ETHER_ALEN)
return -EINVAL;
vif->vif_src_mac = vr_malloc(VR_ETHER_ALEN);
if (!vif->vif_src_mac)
return -ENOMEM;
memcpy(vif->vif_src_mac, vifr->vifr_src_mac, VR_ETHER_ALEN);
}
if (!vif->vif_mtu)
vif->vif_mtu = 1514;
vif->vif_set_rewrite = vif_cmn_rewrite;
vif->vif_tx = vlan_tx;
vif->vif_rx = vlan_rx;
vif->vif_mac_request = vm_mac_request;
vif->vif_vlan_id = vifr->vifr_vlan_id;
vif->vif_ovlan_id = vifr->vifr_ovlan_id;
pvif = vrouter_get_interface(vifr->vifr_rid, vifr->vifr_parent_vif_idx);
if (!pvif)
return -EINVAL;
vif->vif_parent = pvif;
if (!pvif->vif_driver->drv_add_sub_interface)
return -EINVAL;
return pvif->vif_driver->drv_add_sub_interface(pvif, vif);
}
/* end vlan driver */
/* eth driver */
static int
vm_srx(struct vr_interface *vif, struct vr_packet *pkt,
unsigned short vlan_id)
{
unsigned short vrf;
struct vr_interface_stats *stats = vif_get_stats(vif, pkt->vp_cpu);
stats->vis_ibytes += pkt_len(pkt);
stats->vis_ipackets++;
if (vlan_id >= VIF_VRF_TABLE_ENTRIES)
vrf = vif->vif_vrf;
else
vrf = vif->vif_vrf_table[vlan_id].va_vrf;
return vr_virtual_input(vrf, vif, pkt, vlan_id);
}
static mac_response_t
vm_mac_request(struct vr_interface *vif, struct vr_packet *pkt,
struct vr_forwarding_md *fmd, unsigned char *dmac)
{
if (pkt->vp_type == VP_TYPE_ARP) {
return vm_arp_request(vif, pkt, fmd, dmac);
} else if (pkt->vp_type == VP_TYPE_IP6) {
return vm_neighbor_request(vif, pkt, fmd, dmac);
}
return MR_DROP;
}
static int
vm_rx(struct vr_interface *vif, struct vr_packet *pkt,
unsigned short vlan_id)
{
struct vr_interface *sub_vif = NULL;
struct vr_interface_stats *stats = vif_get_stats(vif, pkt->vp_cpu);
struct vr_eth *eth = (struct vr_eth *)pkt_data(pkt);
if (vlan_id != VLAN_ID_INVALID && vlan_id < VLAN_ID_MAX) {
if (vif->vif_btable) {
sub_vif = vif_bridge_get_sub_interface(vif->vif_btable, vlan_id,
eth->eth_smac);
} else {
if (vif->vif_sub_interfaces)
sub_vif = vif->vif_sub_interfaces[vlan_id];
}
if (sub_vif)
return sub_vif->vif_rx(sub_vif, pkt, VLAN_ID_INVALID);
}
/*
* there is a requirement that stats be not counted in both the
* underlying interface and in the sub-interface (double count).
* this behavior is a specific requirement for VM interfaces since
* the VM interface and the sub-interface on top are considered
* two different VMIs and can be in two different VRFs. Counting
* stats in both interfaces will wrongly put statistics in a VRF
* where the statistics should not have been counted. hence the
* stats count block is below and not the first thing that we do
* in this function.
*/
stats->vis_ibytes += pkt_len(pkt);
stats->vis_ipackets++;
return vr_virtual_input(vif->vif_vrf, vif, pkt, vlan_id);
}
static int
tun_rx(struct vr_interface *vif, struct vr_packet *pkt,
unsigned short vlan_id)
{
unsigned char first_b;
struct vr_forwarding_md fmd;
struct vr_interface_stats *stats = vif_get_stats(vif, pkt->vp_cpu);
stats->vis_ibytes += pkt_len(pkt);
stats->vis_ipackets++;
if (vif_mode_xconnect(vif))
pkt->vp_flags |= VP_FLAG_TO_ME;
first_b = *pkt_data(pkt);
first_b &= 0xf0;
switch (first_b) {
case 0x40:
pkt->vp_type = VP_TYPE_IP;
break;
case 0x60:
pkt->vp_type = VP_TYPE_IP6;
break;
default:
vr_pfree(pkt, VP_DROP_INVALID_PACKET);
return 0;
}
pkt_set_network_header(pkt, pkt->vp_data);
vr_init_forwarding_md(&fmd);
fmd.fmd_vlan = vlan_id;
fmd.fmd_dvrf = vif->vif_vrf;
vr_l3_input(pkt, &fmd);
return 0;
}
static unsigned char *
eth_set_rewrite(struct vr_interface *vif, struct vr_packet *pkt,
struct vr_forwarding_md *fmd, unsigned char *rewrite,
unsigned short len)
{
if (!len)
return pkt_data(pkt);
if (pkt->vp_if->vif_type == VIF_TYPE_HOST) {
vr_preset(pkt);
return pkt_data(pkt);
}
return vif_cmn_rewrite(vif, pkt, fmd, rewrite, len);
}
static mac_response_t
eth_mac_request(struct vr_interface *vif, struct vr_packet *pkt,
struct vr_forwarding_md *fmd, unsigned char *dmac)
{
struct vr_arp *sarp;
if (vif_mode_xconnect(vif))
return MR_XCONNECT;
if (fmd->fmd_label >= 0)
return vm_mac_request(vif, pkt, fmd, dmac);
if (pkt->vp_type == VP_TYPE_ARP) {
sarp = (struct vr_arp *)pkt_data(pkt);
if (vr_grat_arp(sarp))
return MR_TRAP_X;
}
return MR_XCONNECT;
}
static int
eth_rx(struct vr_interface *vif, struct vr_packet *pkt,
unsigned short vlan_id)
{
struct vr_interface *sub_vif = NULL;
struct vr_interface_stats *stats = vif_get_stats(vif, pkt->vp_cpu);
struct vr_eth *eth = (struct vr_eth *)pkt_data(pkt);
stats->vis_ibytes += pkt_len(pkt);
stats->vis_ipackets++;
/*
* please see the text on xconnect mode
*
* since we would like the packets to reach the VMs (if they were
* destined to in the first place), packets have to traverse the
* stack. so, just mark a flag suggesting that packet is destined
* for the vrouter and force the vrouter to receive the packet
*/
if (vif_mode_xconnect(vif))
pkt->vp_flags |= VP_FLAG_TO_ME;