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856f5b1357
Periodically receive messages containing the destination IPs of tunnels that have recently forwarded traffic. Update the neighbour entries 'used' value for these IPs next hop. This prevents the neighbour entry from expiring on timeout but rather signals an ARP to verify the connection. From an NFP perspective, packets will not fall back mid-flow unless the link is verified to be down. Signed-off-by: John Hurley <john.hurley@netronome.com> Reviewed-by: Simon Horman <simon.horman@netronome.com> Signed-off-by: Simon Horman <simon.horman@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
811 lines
22 KiB
C
811 lines
22 KiB
C
/*
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* Copyright (C) 2017 Netronome Systems, Inc.
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*
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* This software is dual licensed under the GNU General License Version 2,
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* June 1991 as shown in the file COPYING in the top-level directory of this
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* source tree or the BSD 2-Clause License provided below. You have the
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* option to license this software under the complete terms of either license.
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*
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* The BSD 2-Clause License:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* 1. Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <linux/etherdevice.h>
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#include <linux/inetdevice.h>
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#include <net/netevent.h>
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#include <linux/idr.h>
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#include <net/dst_metadata.h>
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#include <net/arp.h>
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#include "cmsg.h"
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#include "main.h"
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#include "../nfp_net_repr.h"
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#include "../nfp_net.h"
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#define NFP_FL_MAX_ROUTES 32
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/**
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* struct nfp_tun_active_tuns - periodic message of active tunnels
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* @seq: sequence number of the message
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* @count: number of tunnels report in message
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* @flags: options part of the request
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* @ipv4: dest IPv4 address of active route
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* @egress_port: port the encapsulated packet egressed
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* @extra: reserved for future use
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* @tun_info: tunnels that have sent traffic in reported period
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*/
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struct nfp_tun_active_tuns {
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__be32 seq;
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__be32 count;
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__be32 flags;
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struct route_ip_info {
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__be32 ipv4;
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__be32 egress_port;
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__be32 extra[2];
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} tun_info[];
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};
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/**
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* struct nfp_tun_neigh - neighbour/route entry on the NFP
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* @dst_ipv4: destination IPv4 address
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* @src_ipv4: source IPv4 address
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* @dst_addr: destination MAC address
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* @src_addr: source MAC address
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* @port_id: NFP port to output packet on - associated with source IPv4
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*/
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struct nfp_tun_neigh {
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__be32 dst_ipv4;
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__be32 src_ipv4;
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u8 dst_addr[ETH_ALEN];
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u8 src_addr[ETH_ALEN];
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__be32 port_id;
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};
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/**
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* struct nfp_tun_req_route_ipv4 - NFP requests a route/neighbour lookup
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* @ingress_port: ingress port of packet that signalled request
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* @ipv4_addr: destination ipv4 address for route
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* @reserved: reserved for future use
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*/
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struct nfp_tun_req_route_ipv4 {
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__be32 ingress_port;
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__be32 ipv4_addr;
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__be32 reserved[2];
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};
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/**
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* struct nfp_ipv4_route_entry - routes that are offloaded to the NFP
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* @ipv4_addr: destination of route
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* @list: list pointer
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*/
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struct nfp_ipv4_route_entry {
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__be32 ipv4_addr;
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struct list_head list;
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};
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#define NFP_FL_IPV4_ADDRS_MAX 32
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/**
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* struct nfp_tun_ipv4_addr - set the IP address list on the NFP
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* @count: number of IPs populated in the array
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* @ipv4_addr: array of IPV4_ADDRS_MAX 32 bit IPv4 addresses
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*/
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struct nfp_tun_ipv4_addr {
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__be32 count;
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__be32 ipv4_addr[NFP_FL_IPV4_ADDRS_MAX];
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};
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/**
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* struct nfp_ipv4_addr_entry - cached IPv4 addresses
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* @ipv4_addr: IP address
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* @ref_count: number of rules currently using this IP
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* @list: list pointer
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*/
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struct nfp_ipv4_addr_entry {
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__be32 ipv4_addr;
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int ref_count;
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struct list_head list;
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};
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/**
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* struct nfp_tun_mac_addr - configure MAC address of tunnel EP on NFP
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* @reserved: reserved for future use
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* @count: number of MAC addresses in the message
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* @index: index of MAC address in the lookup table
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* @addr: interface MAC address
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* @addresses: series of MACs to offload
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*/
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struct nfp_tun_mac_addr {
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__be16 reserved;
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__be16 count;
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struct index_mac_addr {
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__be16 index;
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u8 addr[ETH_ALEN];
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} addresses[];
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};
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/**
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* struct nfp_tun_mac_offload_entry - list of MACs to offload
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* @index: index of MAC address for offloading
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* @addr: interface MAC address
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* @list: list pointer
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*/
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struct nfp_tun_mac_offload_entry {
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__be16 index;
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u8 addr[ETH_ALEN];
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struct list_head list;
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};
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#define NFP_MAX_MAC_INDEX 0xff
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/**
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* struct nfp_tun_mac_non_nfp_idx - converts non NFP netdev ifindex to 8-bit id
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* @ifindex: netdev ifindex of the device
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* @index: index of netdevs mac on NFP
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* @list: list pointer
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*/
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struct nfp_tun_mac_non_nfp_idx {
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int ifindex;
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u8 index;
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struct list_head list;
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};
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void nfp_tunnel_keep_alive(struct nfp_app *app, struct sk_buff *skb)
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{
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struct nfp_tun_active_tuns *payload;
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struct net_device *netdev;
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int count, i, pay_len;
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struct neighbour *n;
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__be32 ipv4_addr;
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u32 port;
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payload = nfp_flower_cmsg_get_data(skb);
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count = be32_to_cpu(payload->count);
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if (count > NFP_FL_MAX_ROUTES) {
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nfp_flower_cmsg_warn(app, "Tunnel keep-alive request exceeds max routes.\n");
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return;
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}
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pay_len = nfp_flower_cmsg_get_data_len(skb);
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if (pay_len != sizeof(struct nfp_tun_active_tuns) +
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sizeof(struct route_ip_info) * count) {
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nfp_flower_cmsg_warn(app, "Corruption in tunnel keep-alive message.\n");
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return;
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}
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for (i = 0; i < count; i++) {
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ipv4_addr = payload->tun_info[i].ipv4;
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port = be32_to_cpu(payload->tun_info[i].egress_port);
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netdev = nfp_app_repr_get(app, port);
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if (!netdev)
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continue;
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n = neigh_lookup(&arp_tbl, &ipv4_addr, netdev);
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if (!n)
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continue;
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/* Update the used timestamp of neighbour */
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neigh_event_send(n, NULL);
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neigh_release(n);
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}
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}
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static bool nfp_tun_is_netdev_to_offload(struct net_device *netdev)
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{
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if (!netdev->rtnl_link_ops)
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return false;
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if (!strcmp(netdev->rtnl_link_ops->kind, "openvswitch"))
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return true;
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if (!strcmp(netdev->rtnl_link_ops->kind, "vxlan"))
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return true;
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return false;
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}
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static int
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nfp_flower_xmit_tun_conf(struct nfp_app *app, u8 mtype, u16 plen, void *pdata)
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{
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struct sk_buff *skb;
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unsigned char *msg;
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skb = nfp_flower_cmsg_alloc(app, plen, mtype);
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if (!skb)
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return -ENOMEM;
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msg = nfp_flower_cmsg_get_data(skb);
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memcpy(msg, pdata, nfp_flower_cmsg_get_data_len(skb));
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nfp_ctrl_tx(app->ctrl, skb);
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return 0;
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}
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static bool nfp_tun_has_route(struct nfp_app *app, __be32 ipv4_addr)
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{
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struct nfp_flower_priv *priv = app->priv;
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struct nfp_ipv4_route_entry *entry;
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struct list_head *ptr, *storage;
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mutex_lock(&priv->nfp_neigh_off_lock);
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list_for_each_safe(ptr, storage, &priv->nfp_neigh_off_list) {
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entry = list_entry(ptr, struct nfp_ipv4_route_entry, list);
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if (entry->ipv4_addr == ipv4_addr) {
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mutex_unlock(&priv->nfp_neigh_off_lock);
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return true;
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}
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}
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mutex_unlock(&priv->nfp_neigh_off_lock);
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return false;
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}
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static void nfp_tun_add_route_to_cache(struct nfp_app *app, __be32 ipv4_addr)
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{
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struct nfp_flower_priv *priv = app->priv;
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struct nfp_ipv4_route_entry *entry;
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struct list_head *ptr, *storage;
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mutex_lock(&priv->nfp_neigh_off_lock);
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list_for_each_safe(ptr, storage, &priv->nfp_neigh_off_list) {
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entry = list_entry(ptr, struct nfp_ipv4_route_entry, list);
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if (entry->ipv4_addr == ipv4_addr) {
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mutex_unlock(&priv->nfp_neigh_off_lock);
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return;
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}
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}
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entry = kmalloc(sizeof(*entry), GFP_KERNEL);
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if (!entry) {
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mutex_unlock(&priv->nfp_neigh_off_lock);
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nfp_flower_cmsg_warn(app, "Mem error when storing new route.\n");
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return;
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}
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entry->ipv4_addr = ipv4_addr;
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list_add_tail(&entry->list, &priv->nfp_neigh_off_list);
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mutex_unlock(&priv->nfp_neigh_off_lock);
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}
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static void nfp_tun_del_route_from_cache(struct nfp_app *app, __be32 ipv4_addr)
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{
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struct nfp_flower_priv *priv = app->priv;
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struct nfp_ipv4_route_entry *entry;
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struct list_head *ptr, *storage;
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mutex_lock(&priv->nfp_neigh_off_lock);
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list_for_each_safe(ptr, storage, &priv->nfp_neigh_off_list) {
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entry = list_entry(ptr, struct nfp_ipv4_route_entry, list);
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if (entry->ipv4_addr == ipv4_addr) {
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list_del(&entry->list);
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kfree(entry);
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break;
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}
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}
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mutex_unlock(&priv->nfp_neigh_off_lock);
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}
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static void
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nfp_tun_write_neigh(struct net_device *netdev, struct nfp_app *app,
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struct flowi4 *flow, struct neighbour *neigh)
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{
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struct nfp_tun_neigh payload;
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/* Only offload representor IPv4s for now. */
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if (!nfp_netdev_is_nfp_repr(netdev))
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return;
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memset(&payload, 0, sizeof(struct nfp_tun_neigh));
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payload.dst_ipv4 = flow->daddr;
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/* If entry has expired send dst IP with all other fields 0. */
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if (!(neigh->nud_state & NUD_VALID)) {
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nfp_tun_del_route_from_cache(app, payload.dst_ipv4);
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/* Trigger ARP to verify invalid neighbour state. */
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neigh_event_send(neigh, NULL);
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goto send_msg;
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}
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/* Have a valid neighbour so populate rest of entry. */
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payload.src_ipv4 = flow->saddr;
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ether_addr_copy(payload.src_addr, netdev->dev_addr);
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neigh_ha_snapshot(payload.dst_addr, neigh, netdev);
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payload.port_id = cpu_to_be32(nfp_repr_get_port_id(netdev));
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/* Add destination of new route to NFP cache. */
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nfp_tun_add_route_to_cache(app, payload.dst_ipv4);
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send_msg:
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nfp_flower_xmit_tun_conf(app, NFP_FLOWER_CMSG_TYPE_TUN_NEIGH,
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sizeof(struct nfp_tun_neigh),
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(unsigned char *)&payload);
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}
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static int
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nfp_tun_neigh_event_handler(struct notifier_block *nb, unsigned long event,
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void *ptr)
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{
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struct nfp_flower_priv *app_priv;
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struct netevent_redirect *redir;
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struct flowi4 flow = {};
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struct neighbour *n;
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struct nfp_app *app;
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struct rtable *rt;
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int err;
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switch (event) {
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case NETEVENT_REDIRECT:
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redir = (struct netevent_redirect *)ptr;
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n = redir->neigh;
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break;
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case NETEVENT_NEIGH_UPDATE:
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n = (struct neighbour *)ptr;
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break;
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default:
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return NOTIFY_DONE;
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}
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flow.daddr = *(__be32 *)n->primary_key;
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/* Only concerned with route changes for representors. */
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if (!nfp_netdev_is_nfp_repr(n->dev))
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return NOTIFY_DONE;
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app_priv = container_of(nb, struct nfp_flower_priv, nfp_tun_neigh_nb);
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app = app_priv->app;
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/* Only concerned with changes to routes already added to NFP. */
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if (!nfp_tun_has_route(app, flow.daddr))
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return NOTIFY_DONE;
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#if IS_ENABLED(CONFIG_INET)
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/* Do a route lookup to populate flow data. */
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rt = ip_route_output_key(dev_net(n->dev), &flow);
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err = PTR_ERR_OR_ZERO(rt);
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if (err)
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return NOTIFY_DONE;
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#else
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return NOTIFY_DONE;
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#endif
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flow.flowi4_proto = IPPROTO_UDP;
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nfp_tun_write_neigh(n->dev, app, &flow, n);
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return NOTIFY_OK;
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}
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void nfp_tunnel_request_route(struct nfp_app *app, struct sk_buff *skb)
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{
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struct nfp_tun_req_route_ipv4 *payload;
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struct net_device *netdev;
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struct flowi4 flow = {};
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struct neighbour *n;
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struct rtable *rt;
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int err;
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payload = nfp_flower_cmsg_get_data(skb);
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netdev = nfp_app_repr_get(app, be32_to_cpu(payload->ingress_port));
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if (!netdev)
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goto route_fail_warning;
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flow.daddr = payload->ipv4_addr;
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flow.flowi4_proto = IPPROTO_UDP;
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#if IS_ENABLED(CONFIG_INET)
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/* Do a route lookup on same namespace as ingress port. */
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rt = ip_route_output_key(dev_net(netdev), &flow);
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err = PTR_ERR_OR_ZERO(rt);
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if (err)
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goto route_fail_warning;
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#else
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goto route_fail_warning;
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#endif
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/* Get the neighbour entry for the lookup */
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n = dst_neigh_lookup(&rt->dst, &flow.daddr);
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ip_rt_put(rt);
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if (!n)
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goto route_fail_warning;
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nfp_tun_write_neigh(n->dev, app, &flow, n);
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neigh_release(n);
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return;
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route_fail_warning:
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nfp_flower_cmsg_warn(app, "Requested route not found.\n");
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}
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static void nfp_tun_write_ipv4_list(struct nfp_app *app)
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{
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struct nfp_flower_priv *priv = app->priv;
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struct nfp_ipv4_addr_entry *entry;
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struct nfp_tun_ipv4_addr payload;
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struct list_head *ptr, *storage;
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int count;
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memset(&payload, 0, sizeof(struct nfp_tun_ipv4_addr));
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mutex_lock(&priv->nfp_ipv4_off_lock);
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count = 0;
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list_for_each_safe(ptr, storage, &priv->nfp_ipv4_off_list) {
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if (count >= NFP_FL_IPV4_ADDRS_MAX) {
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mutex_unlock(&priv->nfp_ipv4_off_lock);
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nfp_flower_cmsg_warn(app, "IPv4 offload exceeds limit.\n");
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return;
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}
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entry = list_entry(ptr, struct nfp_ipv4_addr_entry, list);
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payload.ipv4_addr[count++] = entry->ipv4_addr;
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}
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payload.count = cpu_to_be32(count);
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mutex_unlock(&priv->nfp_ipv4_off_lock);
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nfp_flower_xmit_tun_conf(app, NFP_FLOWER_CMSG_TYPE_TUN_IPS,
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sizeof(struct nfp_tun_ipv4_addr),
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&payload);
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}
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void nfp_tunnel_add_ipv4_off(struct nfp_app *app, __be32 ipv4)
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{
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struct nfp_flower_priv *priv = app->priv;
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struct nfp_ipv4_addr_entry *entry;
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struct list_head *ptr, *storage;
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mutex_lock(&priv->nfp_ipv4_off_lock);
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list_for_each_safe(ptr, storage, &priv->nfp_ipv4_off_list) {
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entry = list_entry(ptr, struct nfp_ipv4_addr_entry, list);
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if (entry->ipv4_addr == ipv4) {
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entry->ref_count++;
|
|
mutex_unlock(&priv->nfp_ipv4_off_lock);
|
|
return;
|
|
}
|
|
}
|
|
|
|
entry = kmalloc(sizeof(*entry), GFP_KERNEL);
|
|
if (!entry) {
|
|
mutex_unlock(&priv->nfp_ipv4_off_lock);
|
|
nfp_flower_cmsg_warn(app, "Mem error when offloading IP address.\n");
|
|
return;
|
|
}
|
|
entry->ipv4_addr = ipv4;
|
|
entry->ref_count = 1;
|
|
list_add_tail(&entry->list, &priv->nfp_ipv4_off_list);
|
|
mutex_unlock(&priv->nfp_ipv4_off_lock);
|
|
|
|
nfp_tun_write_ipv4_list(app);
|
|
}
|
|
|
|
void nfp_tunnel_del_ipv4_off(struct nfp_app *app, __be32 ipv4)
|
|
{
|
|
struct nfp_flower_priv *priv = app->priv;
|
|
struct nfp_ipv4_addr_entry *entry;
|
|
struct list_head *ptr, *storage;
|
|
|
|
mutex_lock(&priv->nfp_ipv4_off_lock);
|
|
list_for_each_safe(ptr, storage, &priv->nfp_ipv4_off_list) {
|
|
entry = list_entry(ptr, struct nfp_ipv4_addr_entry, list);
|
|
if (entry->ipv4_addr == ipv4) {
|
|
entry->ref_count--;
|
|
if (!entry->ref_count) {
|
|
list_del(&entry->list);
|
|
kfree(entry);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
mutex_unlock(&priv->nfp_ipv4_off_lock);
|
|
|
|
nfp_tun_write_ipv4_list(app);
|
|
}
|
|
|
|
void nfp_tunnel_write_macs(struct nfp_app *app)
|
|
{
|
|
struct nfp_flower_priv *priv = app->priv;
|
|
struct nfp_tun_mac_offload_entry *entry;
|
|
struct nfp_tun_mac_addr *payload;
|
|
struct list_head *ptr, *storage;
|
|
int mac_count, err, pay_size;
|
|
|
|
mutex_lock(&priv->nfp_mac_off_lock);
|
|
if (!priv->nfp_mac_off_count) {
|
|
mutex_unlock(&priv->nfp_mac_off_lock);
|
|
return;
|
|
}
|
|
|
|
pay_size = sizeof(struct nfp_tun_mac_addr) +
|
|
sizeof(struct index_mac_addr) * priv->nfp_mac_off_count;
|
|
|
|
payload = kzalloc(pay_size, GFP_KERNEL);
|
|
if (!payload) {
|
|
mutex_unlock(&priv->nfp_mac_off_lock);
|
|
return;
|
|
}
|
|
|
|
payload->count = cpu_to_be16(priv->nfp_mac_off_count);
|
|
|
|
mac_count = 0;
|
|
list_for_each_safe(ptr, storage, &priv->nfp_mac_off_list) {
|
|
entry = list_entry(ptr, struct nfp_tun_mac_offload_entry,
|
|
list);
|
|
payload->addresses[mac_count].index = entry->index;
|
|
ether_addr_copy(payload->addresses[mac_count].addr,
|
|
entry->addr);
|
|
mac_count++;
|
|
}
|
|
|
|
err = nfp_flower_xmit_tun_conf(app, NFP_FLOWER_CMSG_TYPE_TUN_MAC,
|
|
pay_size, payload);
|
|
|
|
kfree(payload);
|
|
|
|
if (err) {
|
|
mutex_unlock(&priv->nfp_mac_off_lock);
|
|
/* Write failed so retain list for future retry. */
|
|
return;
|
|
}
|
|
|
|
/* If list was successfully offloaded, flush it. */
|
|
list_for_each_safe(ptr, storage, &priv->nfp_mac_off_list) {
|
|
entry = list_entry(ptr, struct nfp_tun_mac_offload_entry,
|
|
list);
|
|
list_del(&entry->list);
|
|
kfree(entry);
|
|
}
|
|
|
|
priv->nfp_mac_off_count = 0;
|
|
mutex_unlock(&priv->nfp_mac_off_lock);
|
|
}
|
|
|
|
static int nfp_tun_get_mac_idx(struct nfp_app *app, int ifindex)
|
|
{
|
|
struct nfp_flower_priv *priv = app->priv;
|
|
struct nfp_tun_mac_non_nfp_idx *entry;
|
|
struct list_head *ptr, *storage;
|
|
int idx;
|
|
|
|
mutex_lock(&priv->nfp_mac_index_lock);
|
|
list_for_each_safe(ptr, storage, &priv->nfp_mac_index_list) {
|
|
entry = list_entry(ptr, struct nfp_tun_mac_non_nfp_idx, list);
|
|
if (entry->ifindex == ifindex) {
|
|
idx = entry->index;
|
|
mutex_unlock(&priv->nfp_mac_index_lock);
|
|
return idx;
|
|
}
|
|
}
|
|
|
|
idx = ida_simple_get(&priv->nfp_mac_off_ids, 0,
|
|
NFP_MAX_MAC_INDEX, GFP_KERNEL);
|
|
if (idx < 0) {
|
|
mutex_unlock(&priv->nfp_mac_index_lock);
|
|
return idx;
|
|
}
|
|
|
|
entry = kmalloc(sizeof(*entry), GFP_KERNEL);
|
|
if (!entry) {
|
|
mutex_unlock(&priv->nfp_mac_index_lock);
|
|
return -ENOMEM;
|
|
}
|
|
entry->ifindex = ifindex;
|
|
entry->index = idx;
|
|
list_add_tail(&entry->list, &priv->nfp_mac_index_list);
|
|
mutex_unlock(&priv->nfp_mac_index_lock);
|
|
|
|
return idx;
|
|
}
|
|
|
|
static void nfp_tun_del_mac_idx(struct nfp_app *app, int ifindex)
|
|
{
|
|
struct nfp_flower_priv *priv = app->priv;
|
|
struct nfp_tun_mac_non_nfp_idx *entry;
|
|
struct list_head *ptr, *storage;
|
|
|
|
mutex_lock(&priv->nfp_mac_index_lock);
|
|
list_for_each_safe(ptr, storage, &priv->nfp_mac_index_list) {
|
|
entry = list_entry(ptr, struct nfp_tun_mac_non_nfp_idx, list);
|
|
if (entry->ifindex == ifindex) {
|
|
ida_simple_remove(&priv->nfp_mac_off_ids,
|
|
entry->index);
|
|
list_del(&entry->list);
|
|
kfree(entry);
|
|
break;
|
|
}
|
|
}
|
|
mutex_unlock(&priv->nfp_mac_index_lock);
|
|
}
|
|
|
|
static void nfp_tun_add_to_mac_offload_list(struct net_device *netdev,
|
|
struct nfp_app *app)
|
|
{
|
|
struct nfp_flower_priv *priv = app->priv;
|
|
struct nfp_tun_mac_offload_entry *entry;
|
|
u16 nfp_mac_idx;
|
|
int port = 0;
|
|
|
|
/* Check if MAC should be offloaded. */
|
|
if (!is_valid_ether_addr(netdev->dev_addr))
|
|
return;
|
|
|
|
if (nfp_netdev_is_nfp_repr(netdev))
|
|
port = nfp_repr_get_port_id(netdev);
|
|
else if (!nfp_tun_is_netdev_to_offload(netdev))
|
|
return;
|
|
|
|
entry = kmalloc(sizeof(*entry), GFP_KERNEL);
|
|
if (!entry) {
|
|
nfp_flower_cmsg_warn(app, "Mem fail when offloading MAC.\n");
|
|
return;
|
|
}
|
|
|
|
if (FIELD_GET(NFP_FLOWER_CMSG_PORT_TYPE, port) ==
|
|
NFP_FLOWER_CMSG_PORT_TYPE_PHYS_PORT) {
|
|
nfp_mac_idx = port << 8 | NFP_FLOWER_CMSG_PORT_TYPE_PHYS_PORT;
|
|
} else if (FIELD_GET(NFP_FLOWER_CMSG_PORT_TYPE, port) ==
|
|
NFP_FLOWER_CMSG_PORT_TYPE_PCIE_PORT) {
|
|
port = FIELD_GET(NFP_FLOWER_CMSG_PORT_VNIC, port);
|
|
nfp_mac_idx = port << 8 | NFP_FLOWER_CMSG_PORT_TYPE_PCIE_PORT;
|
|
} else {
|
|
/* Must assign our own unique 8-bit index. */
|
|
int idx = nfp_tun_get_mac_idx(app, netdev->ifindex);
|
|
|
|
if (idx < 0) {
|
|
nfp_flower_cmsg_warn(app, "Can't assign non-repr MAC index.\n");
|
|
kfree(entry);
|
|
return;
|
|
}
|
|
nfp_mac_idx = idx << 8 | NFP_FLOWER_CMSG_PORT_TYPE_OTHER_PORT;
|
|
}
|
|
|
|
entry->index = cpu_to_be16(nfp_mac_idx);
|
|
ether_addr_copy(entry->addr, netdev->dev_addr);
|
|
|
|
mutex_lock(&priv->nfp_mac_off_lock);
|
|
priv->nfp_mac_off_count++;
|
|
list_add_tail(&entry->list, &priv->nfp_mac_off_list);
|
|
mutex_unlock(&priv->nfp_mac_off_lock);
|
|
}
|
|
|
|
static int nfp_tun_mac_event_handler(struct notifier_block *nb,
|
|
unsigned long event, void *ptr)
|
|
{
|
|
struct nfp_flower_priv *app_priv;
|
|
struct net_device *netdev;
|
|
struct nfp_app *app;
|
|
|
|
if (event == NETDEV_DOWN || event == NETDEV_UNREGISTER) {
|
|
app_priv = container_of(nb, struct nfp_flower_priv,
|
|
nfp_tun_mac_nb);
|
|
app = app_priv->app;
|
|
netdev = netdev_notifier_info_to_dev(ptr);
|
|
|
|
/* If non-nfp netdev then free its offload index. */
|
|
if (nfp_tun_is_netdev_to_offload(netdev))
|
|
nfp_tun_del_mac_idx(app, netdev->ifindex);
|
|
} else if (event == NETDEV_UP || event == NETDEV_CHANGEADDR ||
|
|
event == NETDEV_REGISTER) {
|
|
app_priv = container_of(nb, struct nfp_flower_priv,
|
|
nfp_tun_mac_nb);
|
|
app = app_priv->app;
|
|
netdev = netdev_notifier_info_to_dev(ptr);
|
|
|
|
nfp_tun_add_to_mac_offload_list(netdev, app);
|
|
|
|
/* Force a list write to keep NFP up to date. */
|
|
nfp_tunnel_write_macs(app);
|
|
}
|
|
return NOTIFY_OK;
|
|
}
|
|
|
|
int nfp_tunnel_config_start(struct nfp_app *app)
|
|
{
|
|
struct nfp_flower_priv *priv = app->priv;
|
|
struct net_device *netdev;
|
|
int err;
|
|
|
|
/* Initialise priv data for MAC offloading. */
|
|
priv->nfp_mac_off_count = 0;
|
|
mutex_init(&priv->nfp_mac_off_lock);
|
|
INIT_LIST_HEAD(&priv->nfp_mac_off_list);
|
|
priv->nfp_tun_mac_nb.notifier_call = nfp_tun_mac_event_handler;
|
|
mutex_init(&priv->nfp_mac_index_lock);
|
|
INIT_LIST_HEAD(&priv->nfp_mac_index_list);
|
|
ida_init(&priv->nfp_mac_off_ids);
|
|
|
|
/* Initialise priv data for IPv4 offloading. */
|
|
mutex_init(&priv->nfp_ipv4_off_lock);
|
|
INIT_LIST_HEAD(&priv->nfp_ipv4_off_list);
|
|
|
|
/* Initialise priv data for neighbour offloading. */
|
|
mutex_init(&priv->nfp_neigh_off_lock);
|
|
INIT_LIST_HEAD(&priv->nfp_neigh_off_list);
|
|
priv->nfp_tun_neigh_nb.notifier_call = nfp_tun_neigh_event_handler;
|
|
|
|
err = register_netdevice_notifier(&priv->nfp_tun_mac_nb);
|
|
if (err)
|
|
goto err_free_mac_ida;
|
|
|
|
err = register_netevent_notifier(&priv->nfp_tun_neigh_nb);
|
|
if (err)
|
|
goto err_unreg_mac_nb;
|
|
|
|
/* Parse netdevs already registered for MACs that need offloaded. */
|
|
rtnl_lock();
|
|
for_each_netdev(&init_net, netdev)
|
|
nfp_tun_add_to_mac_offload_list(netdev, app);
|
|
rtnl_unlock();
|
|
|
|
return 0;
|
|
|
|
err_unreg_mac_nb:
|
|
unregister_netdevice_notifier(&priv->nfp_tun_mac_nb);
|
|
err_free_mac_ida:
|
|
ida_destroy(&priv->nfp_mac_off_ids);
|
|
return err;
|
|
}
|
|
|
|
void nfp_tunnel_config_stop(struct nfp_app *app)
|
|
{
|
|
struct nfp_tun_mac_offload_entry *mac_entry;
|
|
struct nfp_flower_priv *priv = app->priv;
|
|
struct nfp_ipv4_route_entry *route_entry;
|
|
struct nfp_tun_mac_non_nfp_idx *mac_idx;
|
|
struct nfp_ipv4_addr_entry *ip_entry;
|
|
struct list_head *ptr, *storage;
|
|
|
|
unregister_netdevice_notifier(&priv->nfp_tun_mac_nb);
|
|
unregister_netevent_notifier(&priv->nfp_tun_neigh_nb);
|
|
|
|
/* Free any memory that may be occupied by MAC list. */
|
|
mutex_lock(&priv->nfp_mac_off_lock);
|
|
list_for_each_safe(ptr, storage, &priv->nfp_mac_off_list) {
|
|
mac_entry = list_entry(ptr, struct nfp_tun_mac_offload_entry,
|
|
list);
|
|
list_del(&mac_entry->list);
|
|
kfree(mac_entry);
|
|
}
|
|
mutex_unlock(&priv->nfp_mac_off_lock);
|
|
|
|
/* Free any memory that may be occupied by MAC index list. */
|
|
mutex_lock(&priv->nfp_mac_index_lock);
|
|
list_for_each_safe(ptr, storage, &priv->nfp_mac_index_list) {
|
|
mac_idx = list_entry(ptr, struct nfp_tun_mac_non_nfp_idx,
|
|
list);
|
|
list_del(&mac_idx->list);
|
|
kfree(mac_idx);
|
|
}
|
|
mutex_unlock(&priv->nfp_mac_index_lock);
|
|
|
|
ida_destroy(&priv->nfp_mac_off_ids);
|
|
|
|
/* Free any memory that may be occupied by ipv4 list. */
|
|
mutex_lock(&priv->nfp_ipv4_off_lock);
|
|
list_for_each_safe(ptr, storage, &priv->nfp_ipv4_off_list) {
|
|
ip_entry = list_entry(ptr, struct nfp_ipv4_addr_entry, list);
|
|
list_del(&ip_entry->list);
|
|
kfree(ip_entry);
|
|
}
|
|
mutex_unlock(&priv->nfp_ipv4_off_lock);
|
|
|
|
/* Free any memory that may be occupied by the route list. */
|
|
mutex_lock(&priv->nfp_neigh_off_lock);
|
|
list_for_each_safe(ptr, storage, &priv->nfp_neigh_off_list) {
|
|
route_entry = list_entry(ptr, struct nfp_ipv4_route_entry,
|
|
list);
|
|
list_del(&route_entry->list);
|
|
kfree(route_entry);
|
|
}
|
|
mutex_unlock(&priv->nfp_neigh_off_lock);
|
|
}
|