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nest-open-source / manifest_repos / sdk / 298baf23afcd1beb26cd47146293d6ea996a71fc / . / qca-nss-clients / tunipip6 / nss_connmgr_tunipip6.c
blob: 0a03a7db27e43e96ff38f0cff4b71f7c6054aaf8 [file] [log] [blame]
/*
**************************************************************************
* Copyright (c) 2014, 2017-2018, 2020 The Linux Foundation. All rights reserved.
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
**************************************************************************
*/
#include <linux/version.h>
#include <linux/types.h>
#include <linux/ip.h>
#include <linux/of.h>
#include <linux/module.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <net/ip.h>
#include <net/ipv6.h>
#include <linux/if.h>
#include <net/ip_tunnels.h>
#include <net/ip6_tunnel.h>
#include <nss_api_if.h>
#include "nss_connmgr_tunipip6.h"
#include "nss_connmgr_tunipip6_sysctl.h"
#include "nss_connmgr_tunipip6_priv.h"
#define NSS_TUNIPIP6_MAX_FMR 255 /* Maximum number of forward mapping rule (FMR). */
/*
* Frag Id update is disabled by default
*/
bool frag_id_update = false;
/*
* Creating custom ipip6 interface is disabled by default.
*/
static bool enable_custom;
module_param(enable_custom, bool, 0);
/*
* tunipip6 global context.
*/
struct nss_tunipip6_context tunipip6_ctx;
/*
* nss_tunipip6_alloc_instance()
* Allocate tunipip6 interface instance.
*/
static struct nss_tunipip6_instance *nss_tunipip6_alloc_instance(struct net_device *dev,
int inner_ifnum,
int outer_ifnum)
{
struct nss_tunipip6_instance*ntii;
ntii = vzalloc(sizeof(*ntii));
if (!ntii) {
nss_tunipip6_warning("%px: Not able to allocate tunipip6 instance\n", dev);
return NULL;
}
ntii->dev = dev;
/*
* Create statistics dentry.
*/
if (!nss_tunipip6_stats_dentry_create(ntii)) {
vfree(ntii);
nss_tunipip6_warning("%px: Not able to create tunipip6 statistics dentry\n", dev);
return NULL;
}
INIT_LIST_HEAD(&ntii->list);
ntii->inner_ifnum = inner_ifnum;
ntii->outer_ifnum = outer_ifnum;
dev_hold(dev);
return ntii;
}
/*
* nss_tunipip6_free_instance()
* Delete the tunipip6 interface instance from the list and free it.
*
* Note: tunnel list lock is expected to be held by the caller.
*/
static void nss_tunipip6_free_instance(struct nss_tunipip6_instance *ntii)
{
if (!list_empty(&ntii->list)) {
list_del(&ntii->list);
}
vfree(ntii);
}
/*
* nss_tunipip6_find_instance()
* Find tunipip6 interface instance from list.
*
* Note: tunnel list lock is expected to be held by the caller.
*/
struct nss_tunipip6_instance *nss_tunipip6_find_instance(struct net_device *dev)
{
struct nss_tunipip6_instance *ntii;
/*
* Check if dev instance is in the list
*/
list_for_each_entry(ntii, &tunipip6_ctx.dev_list, list) {
if (ntii->dev == dev) {
return ntii;
}
}
return NULL;
}
/*
* nss_tunipip6_find_and_free_instance()
* Find and free the tunipip6 instance.
*/
static enum nss_connmgr_tunipip6_err_codes nss_tunipip6_find_and_free_instance(struct net_device *netdev)
{
struct dentry *dentry;
struct nss_tunipip6_instance *ntii;
spin_lock_bh(&tunipip6_ctx.lock);
ntii = nss_tunipip6_find_instance(netdev);
if (!ntii) {
spin_unlock_bh(&tunipip6_ctx.lock);
nss_tunipip6_warning("%px: Not able to find tunipip6 instance for dev:%s\n", netdev, netdev->name);
return NSS_CONNMGR_TUNIPIP6_CONTEXT_FAILURE;
}
dentry = ntii->dentry;
nss_tunipip6_free_instance(ntii);
spin_unlock_bh(&tunipip6_ctx.lock);
debugfs_remove(dentry);
dev_put(netdev);
return NSS_CONNMGR_TUNIPIP6_SUCCESS;
}
/*
* nss_tunipip6_encap_exception()
* Exception handler registered to NSS driver.
*
* This function is called when no rule is found for successful encapsulation.
*/
static void nss_tunipip6_encap_exception(struct net_device *dev, struct sk_buff *skb, __attribute__((unused)) struct napi_struct *napi)
{
const struct net_device_ops *ops = dev->netdev_ops;
struct netdev_queue *queue;
struct iphdr *iph;
struct rtable *rt;
int cpu;
if (unlikely(!pskb_may_pull(skb, sizeof(struct iphdr)))) {
nss_tunipip6_warning("%px: skb: %px, pskb_may_pull failed to linearize iphdr, packet does not have a proper IPv4 header.", dev, skb);
dev_kfree_skb_any(skb);
return;
}
skb_reset_network_header(skb);
iph = ip_hdr(skb);
nss_tunipip6_assert(iph->version == IPVERSION);
nss_tunipip6_info("%px: received - %d bytes name %s ver %x\n",
skb, skb->len, dev->name, iph->version);
rt = ip_route_output(&init_net, iph->daddr, 0, 0, 0);
if (unlikely(IS_ERR(rt))) {
nss_tunipip6_info("%px: Failed to find IPv4 route for dest %pI4 src %pI4\n", skb, &iph->daddr, &iph->saddr);
dev_kfree_skb_any(skb);
return;
}
nss_tunipip6_trace("%px: Route look up successful for dest_ip: %pI4 src_ip: %pI4 dest dev:%s\n",
skb, &iph->daddr, &iph->saddr, rt->dst.dev->name);
/*
* Send decap direction packets to stack using netif_receive_skb
* NOTE: if tunnel to tunnel traffic is enabled, then this might fail.
*/
if (rt->dst.dev->type != ARPHRD_TUNNEL6) {
skb->dev = dev;
skb->protocol = htons(ETH_P_IP);
skb->pkt_type = PACKET_HOST;
skb->skb_iif = dev->ifindex;
skb->ip_summed = CHECKSUM_NONE;
ip_rt_put(rt);
netif_receive_skb(skb);
return;
}
/*
* Send encap direction packets to tunnel xmit using ndo_start_xmit
*/
skb_dst_drop(skb);
skb_dst_set(skb, &rt->dst);
/*
* Set ignore df bit to fragment the packet in kernel.
*/
if (!(iph->frag_off & htons(IP_DF))) {
skb->ignore_df = true;
}
skb->protocol = htons(ETH_P_IP);
skb->pkt_type = PACKET_HOST;
skb->skb_iif = dev->ifindex;
skb->dev = dev;
skb->ip_summed = CHECKSUM_NONE;
/*
* This is needed to acquire HARD_TX_LOCK.
*/
cpu = smp_processor_id();
queue = skb_get_tx_queue(dev, skb);
nss_tunipip6_trace("%px: skb queue mapping: %d, cpu: %d", skb, skb_get_queue_mapping(skb), cpu);
/*
* Take HARD_TX_LOCK to be in sync with the kernel.
*/
HARD_TX_LOCK(dev, queue, cpu);
/*
* Check if queue is alive
*/
if (unlikely(netif_xmit_frozen_or_stopped(queue))) {
HARD_TX_UNLOCK(dev, queue);
nss_tunipip6_trace("%px: Dropping the packet, as queue: %px is not alive", skb, queue);
skb_dst_drop(skb);
dev_kfree_skb_any(skb);
return;
}
ops->ndo_start_xmit(skb, dev);
HARD_TX_UNLOCK(dev, queue);
}
/*
* nss_tunipip6_decap_exception()
* Exception handler registered to NSS driver.
*
* Exception handler registered to NSS for handling tunipip6 ipv6 pkts.
*/
static void nss_tunipip6_decap_exception(struct net_device *dev, struct sk_buff *skb, __attribute__((unused)) struct napi_struct *napi)
{
const struct net_device_ops *ops = dev->netdev_ops;
struct netdev_queue *queue;
struct iphdr *iph;
struct rtable *rt;
int cpu;
int8_t ver = skb->data[0] >> 4;
nss_tunipip6_trace("%px: received - %d bytes name %s ver %x\n",
dev, skb->len, dev->name, ver);
nss_tunipip6_assert(ver == 6);
if (unlikely(!pskb_may_pull(skb, sizeof(struct ipv6hdr)))) {
nss_tunipip6_warning("%px: pskb_may_pull failed to pull ipv6 header", dev);
dev_kfree_skb_any(skb);
return;
}
skb_pull(skb, sizeof(struct ipv6hdr));
if (unlikely(!pskb_may_pull(skb, sizeof(struct iphdr)))) {
nss_tunipip6_warning("%px: pskb_may_pull failed to linearize iphdr, packet does not have a proper IPv4 header.", dev);
dev_kfree_skb_any(skb);
return;
}
skb_reset_network_header(skb);
iph = ip_hdr(skb);
nss_tunipip6_assert(iph->version == 4);
rt = ip_route_output(&init_net, iph->daddr, 0, 0, 0);
if (unlikely(IS_ERR(rt))) {
nss_tunipip6_info("%px: Failed to find IPv4 route for %pI4\n", skb, &iph->daddr);
dev_kfree_skb_any(skb);
return;
}
nss_tunipip6_trace("%px: Route look up successful for dest_ip: %pI4 src_ip: %pI4\n",
skb, &iph->daddr, &iph->saddr);
skb_dst_drop(skb);
skb_dst_set(skb, &rt->dst);
skb_reset_transport_header(skb);
/*
* Set ignore df bit to fragment the packet in kernel.
*/
if (!(iph->frag_off & htons(IP_DF))) {
skb->ignore_df = true;
}
skb->protocol = htons(ETH_P_IP);
skb->pkt_type = PACKET_HOST;
skb->skb_iif = dev->ifindex;
skb->dev = dev;
skb->ip_summed = CHECKSUM_NONE;
/*
* This is needed to acquire HARD_TX_LOCK.
*/
cpu = smp_processor_id();
queue = skb_get_tx_queue(dev, skb);
nss_tunipip6_trace("%px: skb queue mapping: %d, cpu: %d", skb, skb_get_queue_mapping(skb), cpu);
/*
* Take HARD_TX_LOCK to be in sync with the kernel.
*/
HARD_TX_LOCK(dev, queue, cpu);
/*
* Check if queue is alive
*/
if (unlikely(netif_xmit_frozen_or_stopped(queue))) {
HARD_TX_UNLOCK(dev, queue);
nss_tunipip6_trace("%px: Dropping the packet, as queue: %px is not alive", skb, queue);
skb_dst_drop(skb);
dev_kfree_skb_any(skb);
return;
}
ops->ndo_start_xmit(skb, dev);
HARD_TX_UNLOCK(dev, queue);
}
/*
* nss_tunipip6_update_dev_stats
* Update the Dev stats received from NSS
*/
static void nss_tunipip6_update_dev_stats(struct net_device *dev,
struct nss_tunipip6_msg *tnlmsg)
{
struct pcpu_sw_netstats stats;
enum nss_dynamic_interface_type interface_type;
struct nss_tunipip6_stats_sync_msg *sync_stats = (struct nss_tunipip6_stats_sync_msg *)&tnlmsg->msg.stats;
interface_type = nss_dynamic_interface_get_type(nss_tunipip6_get_context(), tnlmsg->cm.interface);
memset(&stats, 0, sizeof(stats));
if (interface_type == NSS_DYNAMIC_INTERFACE_TYPE_TUNIPIP6_INNER) {
stats.tx_packets = sync_stats->node_stats.tx_packets;
stats.tx_bytes = sync_stats->node_stats.tx_bytes;
} else if (interface_type == NSS_DYNAMIC_INTERFACE_TYPE_TUNIPIP6_OUTER) {
stats.rx_packets = sync_stats->node_stats.rx_packets;
stats.rx_bytes = sync_stats->node_stats.rx_bytes;
} else {
nss_tunipip6_warning("%px: Invalid interface type received from NSS\n", dev);
return;
}
dev->stats.rx_dropped += nss_cmn_rx_dropped_sum(&sync_stats->node_stats);
/* TODO: Update rx_dropped stats in ip6_update_offload_stats() */
ip6_update_offload_stats(dev, (void *)&stats);
}
/*
* nss_tunipip6_event_receive()
* Event Callback to receive events from NSS.
*/
void nss_tunipip6_event_receive(void *if_ctx, struct nss_tunipip6_msg *tnlmsg)
{
struct net_device *netdev = NULL;
netdev = (struct net_device *)if_ctx;
switch (tnlmsg->cm.type) {
case NSS_TUNIPIP6_STATS_SYNC:
/*
* Update netdevice statistics.
*/
nss_tunipip6_update_dev_stats(netdev, tnlmsg);
/*
* Update NSS statistics for tunipip6.
*/
nss_tunipip6_stats_sync(netdev, tnlmsg);
break;
default:
nss_tunipip6_info("%px: Unknown Event from NSS\n", netdev);
break;
}
}
/*
* _nss_tunipip6_dyn_interface_destroy()
* Destroy NSS dynamic interface.
*/
enum nss_connmgr_tunipip6_err_codes _nss_tunipip6_dyn_interface_destroy(struct net_device *netdev)
{
int inner_ifnum, outer_ifnum;
nss_tx_status_t status;
/*
* Check if tunnel ipip6 is registered ?
*/
inner_ifnum = nss_cmn_get_interface_number_by_dev_and_type(netdev, NSS_DYNAMIC_INTERFACE_TYPE_TUNIPIP6_INNER);
if (inner_ifnum < 0) {
nss_tunipip6_warning("%px: Net device is not registered with nss inner node\n", netdev);
return NSS_CONNMGR_TUNIPIP6_NO_DEV;
}
status = nss_dynamic_interface_dealloc_node(inner_ifnum, NSS_DYNAMIC_INTERFACE_TYPE_TUNIPIP6_INNER);
if (status != NSS_TX_SUCCESS) {
nss_tunipip6_warning("%px: Dealloc inneer node failure\n", netdev);
return NSS_CONNMGR_TUNIPIP6_TUN_DESTROY_FAILURE;
}
/*
* Un-Register IPIP6 tunnel with NSS
*/
nss_unregister_tunipip6_if(inner_ifnum);
outer_ifnum = nss_cmn_get_interface_number_by_dev_and_type(netdev, NSS_DYNAMIC_INTERFACE_TYPE_TUNIPIP6_OUTER);
if (outer_ifnum < 0) {
nss_tunipip6_warning("%px: Net device is not registered with nss outer node\n", netdev);
return NSS_CONNMGR_TUNIPIP6_NO_DEV;
}
status = nss_dynamic_interface_dealloc_node(outer_ifnum, NSS_DYNAMIC_INTERFACE_TYPE_TUNIPIP6_OUTER);
if (status != NSS_TX_SUCCESS) {
nss_tunipip6_warning("%px: Dealloc outer node failure\n", netdev);
return NSS_CONNMGR_TUNIPIP6_TUN_DESTROY_FAILURE;
}
/*
* Un-Register IPIP6 tunnel with NSS
*/
nss_unregister_tunipip6_if(outer_ifnum);
return NSS_CONNMGR_TUNIPIP6_SUCCESS;
}
/*
* nss_tunipip6_dev_parse_param()
* IPIP6 standard Tunnel device i/f up handler
*/
static void nss_tunipip6_dev_parse_param(struct net_device *netdev, struct nss_connmgr_tunipip6_tunnel_cfg *tnlcfg)
{
struct ip6_tnl *tunnel;
struct flowi6 *fl6;
tunnel = (struct ip6_tnl *)netdev_priv(netdev);
/*
* Find the Tunnel device flow information
*/
fl6 = &tunnel->fl.u.ip6;
nss_tunipip6_trace("%px: Tunnel param saddr: %pI6 daddr: %pI6\n", netdev, fl6->saddr.s6_addr32, fl6->daddr.s6_addr32);
nss_tunipip6_trace("%px: Hop limit %d\n", netdev, tunnel->parms.hop_limit);
nss_tunipip6_trace("%px: Tunnel param flag %x fl6.flowlabel %x\n", netdev, tunnel->parms.flags, fl6->flowlabel);
nss_tunipip6_trace("%px: Tunnel frag id update is %d\n", netdev, frag_id_update);
/*
* Prepare The Tunnel configuration parameter to send to nss
*/
tnlcfg->saddr[0] = ntohl(fl6->saddr.s6_addr32[0]);
tnlcfg->saddr[1] = ntohl(fl6->saddr.s6_addr32[1]);
tnlcfg->saddr[2] = ntohl(fl6->saddr.s6_addr32[2]);
tnlcfg->saddr[3] = ntohl(fl6->saddr.s6_addr32[3]);
tnlcfg->daddr[0] = ntohl(fl6->daddr.s6_addr32[0]);
tnlcfg->daddr[1] = ntohl(fl6->daddr.s6_addr32[1]);
tnlcfg->daddr[2] = ntohl(fl6->daddr.s6_addr32[2]);
tnlcfg->daddr[3] = ntohl(fl6->daddr.s6_addr32[3]);
tnlcfg->hop_limit = tunnel->parms.hop_limit;
tnlcfg->flags = ntohl(tunnel->parms.flags);
tnlcfg->ttl_inherit = false;
tnlcfg->tos_inherit = true;
tnlcfg->frag_id_update = frag_id_update;
tnlcfg->fmr_max = NSS_TUNIPIP6_MAX_FMR;
/*
* Flow Label In kernel is stored in big endian format.
*/
tnlcfg->flowlabel = fl6->flowlabel;
/*
* The tunnel_type for ds-lite and map-e should be same.
*/
tnlcfg->tunnel_type = NSS_CONNMGR_TUNIPIP6_TUNNEL_MAPE;
#if IS_ENABLED(CONFIG_MAP_E_SUPPORT)
#ifdef DRAFT03_SUPPORT
/*
* Set "tunnel_type" based on draft03.
*/
if (tunnel->parms.draft03) {
tnlcfg->tunnel_type = NSS_CONNMGR_TUNIPIP6_TUNNEL_MAPE_DRAFT03;
}
#endif
#endif
}
#if IS_ENABLED(CONFIG_MAP_E_SUPPORT)
/*
* nss_connmgr_tunipip6_configure_fmr()
* Add FMR in NSS (if present).
*/
static void nss_connmgr_tunipip6_configure_fmr(struct net_device *netdev)
{
struct ip6_tnl *tunnel;
struct __ip6_tnl_fmr *fmr;
uint32_t fmr_number = 0;
enum nss_connmgr_tunipip6_err_codes status;
struct nss_connmgr_tunipip6_maprule_cfg mrcfg = {0};
tunnel = (struct ip6_tnl *)netdev_priv(netdev);
/*
* Configure FMR table up to NSS_TUNIPIP6_MAX_FMR, the rest will be forwarded to BR
*/
for (fmr = tunnel->parms.fmrs; fmr && fmr_number < NSS_TUNIPIP6_MAX_FMR; fmr = fmr->next, fmr_number++) {
/*
* Prepare "rulecfg"
*/
mrcfg.rule_type = NSS_CONNMGR_TUNIPIP6_RULE_FMR;
mrcfg.ipv6_prefix[0] = ntohl(fmr->ip6_prefix.s6_addr32[0]);
mrcfg.ipv6_prefix[1] = ntohl(fmr->ip6_prefix.s6_addr32[1]);
mrcfg.ipv6_prefix[2] = ntohl(fmr->ip6_prefix.s6_addr32[2]);
mrcfg.ipv6_prefix[3] = ntohl(fmr->ip6_prefix.s6_addr32[3]);
mrcfg.ipv4_prefix = ntohl(fmr->ip4_prefix.s_addr);
mrcfg.ipv6_prefix_len = fmr->ip6_prefix_len;
mrcfg.ipv4_prefix_len = fmr->ip4_prefix_len;
mrcfg.ea_len = fmr->ea_len;
mrcfg.psid_offset = fmr->offset;
/*
* Call add maprule API.
*/
status = nss_connmgr_tunipip6_add_maprule(netdev, &mrcfg);
if (status != NSS_CONNMGR_TUNIPIP6_SUCCESS) {
nss_tunipip6_trace("%px: Not able to add FMR rule. IPv6 Prefix: %pI6 IPv6 Prefix Lenght: %d\n"
"IPv4 Prefix: %pI6 IPv4 Prefix Lenght: %d EA Length: %d PSID Offset: %d\n",
netdev, mrcfg.ipv6_prefix, mrcfg.ipv6_prefix_len,&mrcfg.ipv4_prefix,
mrcfg.ipv4_prefix_len, mrcfg.ea_len, mrcfg.psid_offset);
}
}
}
#endif
/*
* nss_connmgr_tunipip6_create_interface()
* Exported API to create and configure NSS nodes.
*/
enum nss_connmgr_tunipip6_err_codes nss_connmgr_tunipip6_create_interface(struct net_device *netdev, struct nss_connmgr_tunipip6_tunnel_cfg *tnlcfg)
{
struct nss_tunipip6_msg tnlmsg;
struct nss_tunipip6_create_msg *tnlcreate;
struct nss_ctx_instance *nss_ctx;
int inner_ifnum, outer_ifnum;
uint32_t features = 0;
nss_tx_status_t status;
struct nss_tunipip6_instance *ntii;
#if IS_ENABLED(CONFIG_MAP_E_SUPPORT)
#ifndef DRAFT03_SUPPORT
if ((tnlcfg->tunnel_type == NSS_CONNMGR_TUNIPIP6_TUNNEL_4RD) ||
tnlcfg->tunnel_type == NSS_CONNMGR_TUNIPIP6_TUNNEL_MAPE_DRAFT03) {
nss_tunipip6_warning("Draftf03 is not supported\n");
return NSS_CONNMGR_TUNIPIP6_TUN_CREATE_FAILURE;
}
#endif
#endif
/*
* For standard tunnel, netdev and tnlcfg validation is done
* inside nss_tunipip6_dev_parse_param().
*/
if (!enable_custom) {
goto configure_tunnel;
}
if (!netdev || !tnlcfg) {
nss_tunipip6_warning("Invalid parametes passed\n");
return NSS_CONNMGR_TUNIPIP6_INVALID_PARAM;
}
/*
* Validate netdev for ipv6-in-ipv4 Tunnel
*/
if (netdev->type != ARPHRD_TUNNEL6) {
nss_tunipip6_warning("%px: Invalid netdevice type: %d\n", netdev, netdev->type);
return NSS_CONNMGR_TUNIPIP6_NETDEV_TYPE_FAILURE;
}
configure_tunnel:
if ((tnlcfg->tunnel_type != NSS_CONNMGR_TUNIPIP6_TUNNEL_4RD) &&
(tnlcfg->tunnel_type != NSS_CONNMGR_TUNIPIP6_TUNNEL_MAPE) &&
(tnlcfg->tunnel_type != NSS_CONNMGR_TUNIPIP6_TUNNEL_MAPE_DRAFT03)) {
nss_tunipip6_warning("%px: Invalid tunnel type: %d\n", netdev, tnlcfg->tunnel_type);
return NSS_CONNMGR_TUNIPIP6_TUN_NONE;
}
/*
* Prepare The Tunnel configuration parameter to send to nss
*/
memset(&tnlmsg, 0, sizeof(struct nss_tunipip6_msg));
tnlcreate = &tnlmsg.msg.tunipip6_create;
tnlcreate->saddr[0] = tnlcfg->saddr[0];
tnlcreate->saddr[1] = tnlcfg->saddr[1];
tnlcreate->saddr[2] = tnlcfg->saddr[2];
tnlcreate->saddr[3] = tnlcfg->saddr[3];
tnlcreate->daddr[0] = tnlcfg->daddr[0];
tnlcreate->daddr[1] = tnlcfg->daddr[1];
tnlcreate->daddr[2] = tnlcfg->daddr[2];
tnlcreate->daddr[3] = tnlcfg->daddr[3];
tnlcreate->hop_limit = tnlcfg->hop_limit;
tnlcreate->flags = tnlcfg->flags;
tnlcreate->flowlabel = tnlcfg->flowlabel;
tnlcreate->ttl_inherit = tnlcfg->ttl_inherit;
tnlcreate->tos_inherit = tnlcfg->tos_inherit;
tnlcreate->frag_id_update = tnlcfg->frag_id_update;
tnlcreate->fmr_max = tnlcfg->fmr_max;
/*
* Set "draft03" based on "tunnel_type". draft03 should be
* set to 0 for MAPE.
*/
if ((tnlcfg->tunnel_type == NSS_CONNMGR_TUNIPIP6_TUNNEL_4RD) ||
(tnlcfg->tunnel_type == NSS_CONNMGR_TUNIPIP6_TUNNEL_MAPE_DRAFT03)) {
tnlcreate->draft03 = 1;
}
inner_ifnum = nss_dynamic_interface_alloc_node(NSS_DYNAMIC_INTERFACE_TYPE_TUNIPIP6_INNER);
if (inner_ifnum < 0) {
nss_tunipip6_warning("%px: Request interface number failed\n", netdev);
goto inner_alloc_fail;
}
outer_ifnum = nss_dynamic_interface_alloc_node(NSS_DYNAMIC_INTERFACE_TYPE_TUNIPIP6_OUTER);
if (outer_ifnum < 0) {
nss_tunipip6_warning("%px: Request interface number failed\n", netdev);
goto outer_alloc_fail;
}
/*
* Register ipip6 tunnel with NSS
*/
nss_ctx = nss_register_tunipip6_if(inner_ifnum,
NSS_DYNAMIC_INTERFACE_TYPE_TUNIPIP6_INNER,
nss_tunipip6_encap_exception,
nss_tunipip6_event_receive,
netdev,
features);
if (!nss_ctx) {
nss_tunipip6_warning("%px: nss_register_tunipip6_if Failed\n", netdev);
goto inner_reg_fail;
}
nss_ctx = nss_register_tunipip6_if(outer_ifnum,
NSS_DYNAMIC_INTERFACE_TYPE_TUNIPIP6_OUTER,
nss_tunipip6_decap_exception,
nss_tunipip6_event_receive,
netdev,
features);
if (!nss_ctx) {
nss_tunipip6_warning("%px: nss_register_tunipip6_if Failed\n", netdev);
goto outer_reg_fail;
}
nss_tunipip6_trace("%px: nss_register_tunipip6_if Success\n", netdev);
/*
* Updating sibling_if_num for encap interface.
*/
tnlcreate->sibling_if_num = outer_ifnum;
nss_tunipip6_trace("%px: Tunnel Param srcaddr %x:%x:%x:%x daddr %x:%x:%x:%x\n", netdev,
tnlcreate->saddr[0], tnlcreate->saddr[1],
tnlcreate->saddr[2], tnlcreate->saddr[3],
tnlcreate->daddr[0], tnlcreate->daddr[1],
tnlcreate->daddr[2], tnlcreate->daddr[3]);
/*
* Send configure message to encap interface.
*/
nss_tunipip6_msg_init(&tnlmsg, inner_ifnum, NSS_TUNIPIP6_TX_ENCAP_IF_CREATE,
sizeof(struct nss_tunipip6_create_msg), NULL, NULL);
nss_tunipip6_trace("%px: Sending IPIP6 tunnel i/f up command to NSS %px\n", netdev, nss_ctx);
status = nss_tunipip6_tx_sync(nss_ctx, &tnlmsg);
if (status != NSS_TX_SUCCESS) {
nss_tunipip6_warning("%px: Tunnel up command error %d\n", netdev, status);
goto context_alloc_fail;
}
/*
* Updating sibling_if_num for decap interface.
*/
tnlcreate->sibling_if_num = inner_ifnum;
/*
* Send configure message to decap interface.
*/
nss_tunipip6_msg_init(&tnlmsg, outer_ifnum, NSS_TUNIPIP6_TX_DECAP_IF_CREATE,
sizeof(struct nss_tunipip6_create_msg), NULL, NULL);
nss_tunipip6_trace("%px: Sending IPIP6 tunnel i/f up command to NSS %px\n", netdev, nss_ctx);
status = nss_tunipip6_tx_sync(nss_ctx, &tnlmsg);
if (status != NSS_TX_SUCCESS) {
nss_tunipip6_warning("%px: Tunnel up command error %d\n", netdev, status);
goto context_alloc_fail;
}
/*
* Initialize tunipip6 instance.
*/
ntii = nss_tunipip6_alloc_instance(netdev, inner_ifnum, outer_ifnum);
if (!ntii) {
nss_tunipip6_warning("%px: Not able to create tunipip6 instance\n", netdev);
goto context_alloc_fail;
}
/*
* Add the new tunipip6 instance to the global list.
*/
spin_lock_bh(&tunipip6_ctx.lock);
list_add(&ntii->list, &tunipip6_ctx.dev_list);
spin_unlock_bh(&tunipip6_ctx.lock);
return NSS_CONNMGR_TUNIPIP6_SUCCESS;
context_alloc_fail:
nss_unregister_tunipip6_if(outer_ifnum);
outer_reg_fail:
nss_unregister_tunipip6_if(inner_ifnum);
inner_reg_fail:
status = nss_dynamic_interface_dealloc_node(outer_ifnum, NSS_DYNAMIC_INTERFACE_TYPE_TUNIPIP6_OUTER);
if (status != NSS_TX_SUCCESS) {
nss_tunipip6_warning("%px: Unable to dealloc the node[%d] in the NSS fw!\n", netdev, outer_ifnum);
}
outer_alloc_fail:
status = nss_dynamic_interface_dealloc_node(inner_ifnum, NSS_DYNAMIC_INTERFACE_TYPE_TUNIPIP6_INNER);
if (status != NSS_TX_SUCCESS) {
nss_tunipip6_warning("%px: Unable to dealloc the node[%d] in the NSS fw!\n", netdev, inner_ifnum);
}
inner_alloc_fail:
return NSS_CONNMGR_TUNIPIP6_TUN_CREATE_FAILURE;
}
EXPORT_SYMBOL(nss_connmgr_tunipip6_create_interface);
/*
* nss_connmgr_tunipip6_destroy_interface()
* Exported API to destroy NSS dynamic interface.
*/
enum nss_connmgr_tunipip6_err_codes nss_connmgr_tunipip6_destroy_interface(struct net_device *netdev)
{
enum nss_connmgr_tunipip6_err_codes ret;
/*
* Validate netdev for ipv6-in-ipv4 Tunnel
*/
if (netdev->type != ARPHRD_TUNNEL6) {
return NSS_CONNMGR_TUNIPIP6_NETDEV_TYPE_FAILURE;
}
/*
* Destroy tunipip6 NSS context.
*/
ret = _nss_tunipip6_dyn_interface_destroy(netdev);
if (ret != NSS_CONNMGR_TUNIPIP6_SUCCESS) {
nss_tunipip6_warning("%px: Not able to destroy NSS context. Err: %d\n", netdev, ret);
return ret;
}
/*
* Find and free the tunipip6 instance.
*/
ret = nss_tunipip6_find_and_free_instance(netdev);
return ret;
}
EXPORT_SYMBOL(nss_connmgr_tunipip6_destroy_interface);
/*
* nss_connmgr_tunipip6_add_maprule()
* Add new BMR/FMR entry.
*/
enum nss_connmgr_tunipip6_err_codes nss_connmgr_tunipip6_add_maprule(struct net_device *netdev, struct nss_connmgr_tunipip6_maprule_cfg *rulecfg)
{
struct nss_tunipip6_msg tnlmsg;
struct nss_tunipip6_map_rule *rule_add;
struct nss_ctx_instance *nss_ctx;
nss_tx_status_t status;
int inner_ifnum;
int msg_type;
if (!netdev || !rulecfg) {
return NSS_CONNMGR_TUNIPIP6_INVALID_PARAM;
}
inner_ifnum = nss_cmn_get_interface_number_by_dev_and_type(netdev, NSS_DYNAMIC_INTERFACE_TYPE_TUNIPIP6_INNER);
if (inner_ifnum < 0) {
nss_tunipip6_warning("%px: Invalid inner interface number: %d\n", netdev, inner_ifnum);
return NSS_CONNMGR_TUNIPIP6_NO_DEV;
}
switch (rulecfg->rule_type) {
case NSS_CONNMGR_TUNIPIP6_RULE_BMR:
msg_type = NSS_TUNIPIP6_BMR_RULE_ADD;
break;
case NSS_CONNMGR_TUNIPIP6_RULE_FMR:
msg_type = NSS_TUNIPIP6_FMR_RULE_ADD;
break;
default:
nss_tunipip6_warning("%p: Invalid rule type: %d", netdev, rulecfg->rule_type);
return NSS_CONNMGR_TUNIPIP6_INVALID_RULE_TYPE;
}
/*
* Prepare the mapping rule parameter to send to nss
*/
memset(&tnlmsg, 0, sizeof(struct nss_tunipip6_msg));
rule_add = &tnlmsg.msg.map_rule;
rule_add->ip6_prefix[0] = rulecfg->ipv6_prefix[0];
rule_add->ip6_prefix[1] = rulecfg->ipv6_prefix[1];
rule_add->ip6_prefix[2] = rulecfg->ipv6_prefix[2];
rule_add->ip6_prefix[3] = rulecfg->ipv6_prefix[3];
rule_add->ip6_prefix_len = rulecfg->ipv6_prefix_len;
rule_add->ip4_prefix = rulecfg->ipv4_prefix;
rule_add->ip4_prefix_len = rulecfg->ipv4_prefix_len;
rule_add->ip6_suffix[0] = rulecfg->ipv6_suffix[0];
rule_add->ip6_suffix[1] = rulecfg->ipv6_suffix[1];
rule_add->ip6_suffix[2] = rulecfg->ipv6_suffix[2];
rule_add->ip6_suffix[3] = rulecfg->ipv6_suffix[3];
rule_add->ip6_suffix_len = rulecfg->ipv6_suffix_len;
rule_add->ea_len = rulecfg->ea_len;
rule_add->psid_offset = rulecfg->psid_offset;
/*
* Send maprule add message to encap interface.
*/
nss_tunipip6_msg_init(&tnlmsg, inner_ifnum, msg_type,
sizeof(struct nss_tunipip6_map_rule), NULL, NULL);
nss_ctx = nss_tunipip6_get_context();
nss_tunipip6_trace("%px: Sending IPIP6 tunnel maprule, message type %d add command to NSS %p\n", netdev, msg_type, nss_ctx);
status = nss_tunipip6_tx_sync(nss_ctx, &tnlmsg);
if (status != NSS_TX_SUCCESS) {
nss_tunipip6_warning("%px: Tunnel maprule add command error %d\n", netdev, status);
return NSS_CONNMGR_TUNIPIP6_MAPRULE_ADD_FAILURE;
}
return NSS_CONNMGR_TUNIPIP6_SUCCESS;
}
EXPORT_SYMBOL(nss_connmgr_tunipip6_add_maprule);
/*
* nss_connmgr_tunipip6_del_maprule()
* Delete existing BMR/FMR entry.
*/
enum nss_connmgr_tunipip6_err_codes nss_connmgr_tunipip6_del_maprule(struct net_device *netdev, struct nss_connmgr_tunipip6_maprule_cfg *rulecfg)
{
struct nss_tunipip6_msg tnlmsg;
struct nss_tunipip6_map_rule *map_rule;
struct nss_ctx_instance *nss_ctx;
nss_tx_status_t status;
int inner_ifnum;
int msg_type;
if (!netdev || !rulecfg) {
return NSS_CONNMGR_TUNIPIP6_INVALID_PARAM;
}
inner_ifnum = nss_cmn_get_interface_number_by_dev_and_type(netdev, NSS_DYNAMIC_INTERFACE_TYPE_TUNIPIP6_INNER);
if (inner_ifnum < 0) {
nss_tunipip6_warning("%px: Invalid inner interface number: %d\n", netdev, inner_ifnum);
return NSS_CONNMGR_TUNIPIP6_NO_DEV;
}
/*
* Intialize tunnel message.
*/
memset(&tnlmsg, 0, sizeof(struct nss_tunipip6_msg));
/*
* To delete BMR, only delete message is needed.
*/
switch (rulecfg->rule_type) {
case NSS_CONNMGR_TUNIPIP6_RULE_BMR:
msg_type = NSS_TUNIPIP6_BMR_RULE_DEL;
/*
* To delete BMR, only delete message is needed.
*/
goto del_bmr;
case NSS_CONNMGR_TUNIPIP6_RULE_FMR:
msg_type = NSS_TUNIPIP6_FMR_RULE_DEL;
break;
default:
nss_tunipip6_warning("%p: Invalid rule type: %d", netdev, rulecfg->rule_type);
return NSS_CONNMGR_TUNIPIP6_INVALID_RULE_TYPE;
}
/*
* Prepare the maprule rule parameter to send to NSS
*/
map_rule = &tnlmsg.msg.map_rule;
map_rule->ip6_prefix[0] = rulecfg->ipv6_prefix[0];
map_rule->ip6_prefix[1] = rulecfg->ipv6_prefix[1];
map_rule->ip6_prefix[2] = rulecfg->ipv6_prefix[2];
map_rule->ip6_prefix[3] = rulecfg->ipv6_prefix[3];
map_rule->ip6_prefix_len = rulecfg->ipv6_prefix_len;
map_rule->ip4_prefix = rulecfg->ipv4_prefix;
map_rule->ip4_prefix_len = rulecfg->ipv4_prefix_len;
map_rule->ip6_suffix[0] = rulecfg->ipv6_suffix[0];
map_rule->ip6_suffix[1] = rulecfg->ipv6_suffix[1];
map_rule->ip6_suffix[2] = rulecfg->ipv6_suffix[2];
map_rule->ip6_suffix[3] = rulecfg->ipv6_suffix[3];
map_rule->ip6_suffix_len = rulecfg->ipv6_suffix_len;
map_rule->ea_len = rulecfg->ea_len;
map_rule->psid_offset = rulecfg->psid_offset;
del_bmr:
/*
* Send map rule delete message to encap interface.
*/
nss_tunipip6_msg_init(&tnlmsg, inner_ifnum, msg_type,
sizeof(struct nss_tunipip6_map_rule), NULL, NULL);
nss_ctx = nss_tunipip6_get_context();
nss_tunipip6_trace("%px: Sending IPIP6 tunnel maprule, message type %d delete command to NSS %p\n", netdev, msg_type, nss_ctx);
status = nss_tunipip6_tx_sync(nss_ctx, &tnlmsg);
if (status != NSS_TX_SUCCESS) {
nss_tunipip6_warning("%px: Tunnel maprule delete command error %d\n", netdev, status);
return NSS_CONNMGR_TUNIPIP6_MAPRULE_DEL_FAILURE;
}
return NSS_CONNMGR_TUNIPIP6_SUCCESS;
}
EXPORT_SYMBOL(nss_connmgr_tunipip6_del_maprule);
/*
* nss_connmgr_tunipip6_flush_fmr_rule()
* Flush existing FMR entry.
*/
enum nss_connmgr_tunipip6_err_codes nss_connmgr_tunipip6_flush_fmr_rule(struct net_device *netdev)
{
struct nss_tunipip6_msg tnlmsg;
struct nss_ctx_instance *nss_ctx;
nss_tx_status_t status;
int inner_ifnum;
if (!netdev) {
return NSS_CONNMGR_TUNIPIP6_INVALID_PARAM;
}
/*
* Send fmr rule flush message to encap interface.
*/
inner_ifnum = nss_cmn_get_interface_number_by_dev_and_type(netdev, NSS_DYNAMIC_INTERFACE_TYPE_TUNIPIP6_INNER);
if (inner_ifnum < 0) {
nss_tunipip6_warning("%px: Invalid inner interface number: %d\n", netdev, inner_ifnum);
return NSS_CONNMGR_TUNIPIP6_NO_DEV;
}
nss_tunipip6_msg_init(&tnlmsg, inner_ifnum, NSS_TUNIPIP6_FMR_RULE_FLUSH,
0, NULL, NULL);
nss_ctx = nss_tunipip6_get_context();
nss_tunipip6_trace("%px: Sending IPIP6 tunnel FMR rule flush command to NSS %p\n", netdev, nss_ctx);
status = nss_tunipip6_tx_sync(nss_ctx, &tnlmsg);
if (status != NSS_TX_SUCCESS) {
nss_tunipip6_warning("%px: FMR rule flush command error %d\n", netdev, status);
return NSS_CONNMGR_TUNIPIP6_FMR_RULE_FLUSH_FAILURE;
}
return NSS_CONNMGR_TUNIPIP6_SUCCESS;
}
EXPORT_SYMBOL(nss_connmgr_tunipip6_flush_fmr_rule);
/*
* nss_tunipip6_dev_event()
* Net device notifier for ipip6 module
*/
static int nss_tunipip6_dev_event(struct notifier_block *nb,
unsigned long event, void *dev)
{
struct net_device *netdev = netdev_notifier_info_to_dev(dev);
struct nss_connmgr_tunipip6_tunnel_cfg tnlcfg = {0};
/*
* Validate netdev for ipv6-in-ipv4 Tunnel
*/
if (netdev->type != ARPHRD_TUNNEL6 ) {
return NOTIFY_DONE;;
}
switch (event) {
case NETDEV_UP:
nss_tunipip6_trace("%px: NETDEV_UP :event %lu name %s\n", netdev, event, netdev->name);
/*
* Create NSS interface for standard tunnel. The creation of the tunnel
* is a three step process.
* 1. 'tnlcfg' is populated from the netdev parameters.
* 2. Create API is called to create NSS encap and decap nodes.
* 3. Configure FMR rules(if present) in NSS encap node.
*/
nss_tunipip6_dev_parse_param(netdev, &tnlcfg);
if (nss_connmgr_tunipip6_create_interface(netdev, &tnlcfg) != NSS_CONNMGR_TUNIPIP6_SUCCESS) {
nss_tunipip6_trace("%px: Not able to create tunnel for dev: %s\n", netdev, netdev->name);
return NOTIFY_DONE;
}
#if IS_ENABLED(CONFIG_MAP_E_SUPPORT)
nss_connmgr_tunipip6_configure_fmr(netdev);
#endif
break;
case NETDEV_DOWN:
nss_tunipip6_trace("%px: NETDEV_DOWN :event %lu name %s\n", netdev, event, netdev->name);
nss_connmgr_tunipip6_destroy_interface(netdev);
break;
default:
nss_tunipip6_trace("%px: Unhandled notifier dev %s event %x\n", netdev, netdev->name, (int)event);
break;
}
return NOTIFY_DONE;
}
/*
* nss_tunipip6_destroy_interface_all()
* Destroy NSS interfaces and free instance for all tunipip6 interfaces.
*/
static void nss_tunipip6_destroy_interface_all(void)
{
struct net_device *netdev;
struct dentry *dentry;
struct nss_tunipip6_instance *ntii;
spin_lock_bh(&tunipip6_ctx.lock);
ntii = list_first_entry_or_null(&tunipip6_ctx.dev_list, struct nss_tunipip6_instance, list);
do {
if (!ntii) {
spin_unlock_bh(&tunipip6_ctx.lock);
return;
}
netdev = ntii->dev;
dentry = ntii->dentry;
nss_tunipip6_free_instance(ntii);
spin_unlock_bh(&tunipip6_ctx.lock);
dev_put(netdev);
debugfs_remove(dentry);
_nss_tunipip6_dyn_interface_destroy(netdev);
spin_lock_bh(&tunipip6_ctx.lock);
ntii = list_first_entry_or_null(&tunipip6_ctx.dev_list, struct nss_tunipip6_instance, list);
} while (ntii);
spin_unlock_bh(&tunipip6_ctx.lock);
}
/*
* Linux Net device Notifier
*/
struct notifier_block nss_tunipip6_notifier = {
.notifier_call = nss_tunipip6_dev_event,
};
/*
* nss_tunipip6_init_module()
* Tunnel ipip6 module init function
*/
int __init nss_tunipip6_init_module(void)
{
#ifdef CONFIG_OF
/*
* If the node is not compatible, don't do anything.
*/
if (!of_find_node_by_name(NULL, "nss-common")) {
return 0;
}
#endif
nss_tunipip6_info("module (platform - IPQ806x , %s) loaded\n",
NSS_CLIENT_BUILD_ID);
/*
* Initialize lock and dev list.
*/
INIT_LIST_HEAD(&tunipip6_ctx.dev_list);
spin_lock_init(&tunipip6_ctx.lock);
/*
* Create the debugfs directory for statistics.
*/
if (!nss_tunipip6_stats_dentry_init()) {
nss_tunipip6_trace("Failed to initialize debugfs\n");
return -1;
}
/*
* Do not register net device notification for
* custom tunnel. Net device notification is used only
* for standard tunnel.
*/
if (!enable_custom) {
register_netdevice_notifier(&nss_tunipip6_notifier);
nss_tunipip6_trace("Netdev Notifier registerd\n");
}
/*
* Register sysctl to add/delete/flush mapping rules.
*/
nss_tunipip6_sysctl_register();
nss_tunipip6_trace("Sysctl registerd\n");
return 0;
}
/*
* nss_tunipip6_exit_module()
* Tunnel ipip6 module exit function
*/
void __exit nss_tunipip6_exit_module(void)
{
#ifdef CONFIG_OF
/*
* If the node is not compatible, don't do anything.
*/
if (!of_find_node_by_name(NULL, "nss-common")) {
return;
}
#endif
/*
* Free Host and NSS tunipip6 instances.
*/
nss_tunipip6_destroy_interface_all();
/*
* De-initialize debugfs.
*/
nss_tunipip6_stats_dentry_deinit();
/*
* Unregister net device notification for standard tunnel.
*/
if (!enable_custom) {
unregister_netdevice_notifier(&nss_tunipip6_notifier);
nss_tunipip6_trace("Netdev Notifier unregisterd\n");
}
/*
* Unregister sysctl.
*/
nss_tunipip6_sysctl_unregister();
nss_tunipip6_trace("Sysctl unregisterd\n");
nss_tunipip6_info("module unloaded\n");
}
module_init(nss_tunipip6_init_module);
module_exit(nss_tunipip6_exit_module);
MODULE_LICENSE("Dual BSD/GPL");
MODULE_DESCRIPTION("NSS tunipip6 offload manager");