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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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netdevsim: add UDP tunnel port offload support
Add UDP tunnel port handlers to our fake driver so we can test the core infra. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jakub Kicinski
David S. Miller
parent
c7d759eb7b
commit
424be63ad8
5 changed files with 224 additions and 2 deletions
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@ -3,7 +3,7 @@
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obj-$(CONFIG_NETDEVSIM) += netdevsim.o
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netdevsim-objs := \
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netdev.o dev.o fib.o bus.o health.o
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netdev.o dev.o fib.o bus.o health.o udp_tunnels.o
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ifeq ($(CONFIG_BPF_SYSCALL),y)
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netdevsim-objs += \
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@ -225,6 +225,7 @@ static int nsim_dev_debugfs_init(struct nsim_dev *nsim_dev)
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debugfs_create_bool("fail_trap_policer_counter_get", 0600,
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nsim_dev->ddir,
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&nsim_dev->fail_trap_policer_counter_get);
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nsim_udp_tunnels_debugfs_create(nsim_dev);
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return 0;
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}
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@ -22,6 +22,7 @@
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#include <net/netlink.h>
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#include <net/pkt_cls.h>
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#include <net/rtnetlink.h>
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#include <net/udp_tunnel.h>
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#include "netdevsim.h"
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@ -257,6 +258,8 @@ static const struct net_device_ops nsim_netdev_ops = {
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.ndo_setup_tc = nsim_setup_tc,
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.ndo_set_features = nsim_set_features,
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.ndo_bpf = nsim_bpf,
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.ndo_udp_tunnel_add = udp_tunnel_nic_add_port,
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.ndo_udp_tunnel_del = udp_tunnel_nic_del_port,
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.ndo_get_devlink_port = nsim_get_devlink_port,
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};
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@ -299,10 +302,14 @@ nsim_create(struct nsim_dev *nsim_dev, struct nsim_dev_port *nsim_dev_port)
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SET_NETDEV_DEV(dev, &ns->nsim_bus_dev->dev);
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dev->netdev_ops = &nsim_netdev_ops;
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err = nsim_udp_tunnels_info_create(nsim_dev, dev);
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if (err)
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goto err_free_netdev;
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rtnl_lock();
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err = nsim_bpf_init(ns);
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if (err)
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goto err_free_netdev;
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goto err_utn_destroy;
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nsim_ipsec_init(ns);
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@ -317,6 +324,8 @@ nsim_create(struct nsim_dev *nsim_dev, struct nsim_dev_port *nsim_dev_port)
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nsim_ipsec_teardown(ns);
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nsim_bpf_uninit(ns);
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rtnl_unlock();
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err_utn_destroy:
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nsim_udp_tunnels_info_destroy(dev);
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err_free_netdev:
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free_netdev(dev);
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return ERR_PTR(err);
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@ -331,6 +340,7 @@ void nsim_destroy(struct netdevsim *ns)
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nsim_ipsec_teardown(ns);
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nsim_bpf_uninit(ns);
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rtnl_unlock();
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nsim_udp_tunnels_info_destroy(dev);
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free_netdev(dev);
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}
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@ -13,6 +13,7 @@
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* THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
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*/
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#include <linux/debugfs.h>
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#include <linux/device.h>
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#include <linux/kernel.h>
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#include <linux/list.h>
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@ -29,6 +30,7 @@
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#define NSIM_IPSEC_MAX_SA_COUNT 33
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#define NSIM_IPSEC_VALID BIT(31)
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#define NSIM_UDP_TUNNEL_N_PORTS 4
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struct nsim_sa {
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struct xfrm_state *xs;
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@ -72,12 +74,23 @@ struct netdevsim {
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bool bpf_map_accept;
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struct nsim_ipsec ipsec;
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struct {
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u32 inject_error;
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u32 sleep;
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u32 ports[2][NSIM_UDP_TUNNEL_N_PORTS];
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struct debugfs_u32_array dfs_ports[2];
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} udp_ports;
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};
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struct netdevsim *
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nsim_create(struct nsim_dev *nsim_dev, struct nsim_dev_port *nsim_dev_port);
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void nsim_destroy(struct netdevsim *ns);
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void nsim_udp_tunnels_debugfs_create(struct nsim_dev *nsim_dev);
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int nsim_udp_tunnels_info_create(struct nsim_dev *nsim_dev,
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struct net_device *dev);
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void nsim_udp_tunnels_info_destroy(struct net_device *dev);
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#ifdef CONFIG_BPF_SYSCALL
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int nsim_bpf_dev_init(struct nsim_dev *nsim_dev);
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void nsim_bpf_dev_exit(struct nsim_dev *nsim_dev);
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@ -183,6 +196,12 @@ struct nsim_dev {
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bool fail_trap_group_set;
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bool fail_trap_policer_set;
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bool fail_trap_policer_counter_get;
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struct {
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bool sync_all;
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bool open_only;
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bool ipv4_only;
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u32 sleep;
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} udp_ports;
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};
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static inline struct net *nsim_dev_net(struct nsim_dev *nsim_dev)
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192
drivers/net/netdevsim/udp_tunnels.c
Normal file
192
drivers/net/netdevsim/udp_tunnels.c
Normal file
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@ -0,0 +1,192 @@
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// SPDX-License-Identifier: GPL-2.0-only
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// Copyright (c) 2020 Facebook Inc.
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#include <linux/debugfs.h>
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#include <linux/netdevice.h>
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#include <linux/slab.h>
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#include <net/udp_tunnel.h>
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#include "netdevsim.h"
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static int
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nsim_udp_tunnel_set_port(struct net_device *dev, unsigned int table,
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unsigned int entry, struct udp_tunnel_info *ti)
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{
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struct netdevsim *ns = netdev_priv(dev);
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int ret;
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ret = -ns->udp_ports.inject_error;
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ns->udp_ports.inject_error = 0;
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if (ns->udp_ports.sleep)
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msleep(ns->udp_ports.sleep);
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if (!ret) {
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if (ns->udp_ports.ports[table][entry])
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ret = -EBUSY;
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else
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ns->udp_ports.ports[table][entry] =
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be16_to_cpu(ti->port) << 16 | ti->type;
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}
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netdev_info(dev, "set [%d, %d] type %d family %d port %d - %d\n",
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table, entry, ti->type, ti->sa_family, ntohs(ti->port),
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ret);
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return ret;
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}
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static int
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nsim_udp_tunnel_unset_port(struct net_device *dev, unsigned int table,
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unsigned int entry, struct udp_tunnel_info *ti)
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{
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struct netdevsim *ns = netdev_priv(dev);
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int ret;
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ret = -ns->udp_ports.inject_error;
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ns->udp_ports.inject_error = 0;
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if (ns->udp_ports.sleep)
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msleep(ns->udp_ports.sleep);
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if (!ret) {
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u32 val = be16_to_cpu(ti->port) << 16 | ti->type;
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if (val == ns->udp_ports.ports[table][entry])
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ns->udp_ports.ports[table][entry] = 0;
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else
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ret = -ENOENT;
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}
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netdev_info(dev, "unset [%d, %d] type %d family %d port %d - %d\n",
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table, entry, ti->type, ti->sa_family, ntohs(ti->port),
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ret);
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return ret;
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}
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static int
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nsim_udp_tunnel_sync_table(struct net_device *dev, unsigned int table)
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{
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struct netdevsim *ns = netdev_priv(dev);
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struct udp_tunnel_info ti;
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unsigned int i;
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int ret;
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ret = -ns->udp_ports.inject_error;
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ns->udp_ports.inject_error = 0;
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for (i = 0; i < NSIM_UDP_TUNNEL_N_PORTS; i++) {
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udp_tunnel_nic_get_port(dev, table, i, &ti);
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ns->udp_ports.ports[table][i] =
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be16_to_cpu(ti.port) << 16 | ti.type;
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}
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return ret;
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}
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static const struct udp_tunnel_nic_info nsim_udp_tunnel_info = {
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.set_port = nsim_udp_tunnel_set_port,
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.unset_port = nsim_udp_tunnel_unset_port,
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.sync_table = nsim_udp_tunnel_sync_table,
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.tables = {
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{
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.n_entries = NSIM_UDP_TUNNEL_N_PORTS,
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.tunnel_types = UDP_TUNNEL_TYPE_VXLAN,
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},
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{
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.n_entries = NSIM_UDP_TUNNEL_N_PORTS,
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.tunnel_types = UDP_TUNNEL_TYPE_GENEVE |
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UDP_TUNNEL_TYPE_VXLAN_GPE,
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},
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},
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};
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static ssize_t
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nsim_udp_tunnels_info_reset_write(struct file *file, const char __user *data,
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size_t count, loff_t *ppos)
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{
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struct net_device *dev = file->private_data;
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struct netdevsim *ns = netdev_priv(dev);
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memset(&ns->udp_ports.ports, 0, sizeof(ns->udp_ports.ports));
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rtnl_lock();
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udp_tunnel_nic_reset_ntf(dev);
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rtnl_unlock();
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return count;
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}
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static const struct file_operations nsim_udp_tunnels_info_reset_fops = {
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.open = simple_open,
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.write = nsim_udp_tunnels_info_reset_write,
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.llseek = generic_file_llseek,
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};
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int nsim_udp_tunnels_info_create(struct nsim_dev *nsim_dev,
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struct net_device *dev)
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{
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struct netdevsim *ns = netdev_priv(dev);
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struct udp_tunnel_nic_info *info;
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debugfs_create_u32("udp_ports_inject_error", 0600,
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ns->nsim_dev_port->ddir,
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&ns->udp_ports.inject_error);
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ns->udp_ports.dfs_ports[0].array = ns->udp_ports.ports[0];
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ns->udp_ports.dfs_ports[0].n_elements = NSIM_UDP_TUNNEL_N_PORTS;
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debugfs_create_u32_array("udp_ports_table0", 0400,
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ns->nsim_dev_port->ddir,
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&ns->udp_ports.dfs_ports[0]);
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ns->udp_ports.dfs_ports[1].array = ns->udp_ports.ports[1];
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ns->udp_ports.dfs_ports[1].n_elements = NSIM_UDP_TUNNEL_N_PORTS;
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debugfs_create_u32_array("udp_ports_table1", 0400,
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ns->nsim_dev_port->ddir,
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&ns->udp_ports.dfs_ports[1]);
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debugfs_create_file("udp_ports_reset", 0200, ns->nsim_dev_port->ddir,
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dev, &nsim_udp_tunnels_info_reset_fops);
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/* Note: it's not normal to allocate the info struct like this!
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* Drivers are expected to use a static const one, here we're testing.
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*/
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info = kmemdup(&nsim_udp_tunnel_info, sizeof(nsim_udp_tunnel_info),
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GFP_KERNEL);
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if (!info)
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return -ENOMEM;
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ns->udp_ports.sleep = nsim_dev->udp_ports.sleep;
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if (nsim_dev->udp_ports.sync_all) {
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info->set_port = NULL;
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info->unset_port = NULL;
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} else {
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info->sync_table = NULL;
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}
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if (ns->udp_ports.sleep)
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info->flags |= UDP_TUNNEL_NIC_INFO_MAY_SLEEP;
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if (nsim_dev->udp_ports.open_only)
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info->flags |= UDP_TUNNEL_NIC_INFO_OPEN_ONLY;
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if (nsim_dev->udp_ports.ipv4_only)
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info->flags |= UDP_TUNNEL_NIC_INFO_IPV4_ONLY;
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dev->udp_tunnel_nic_info = info;
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return 0;
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}
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void nsim_udp_tunnels_info_destroy(struct net_device *dev)
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{
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kfree(dev->udp_tunnel_nic_info);
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dev->udp_tunnel_nic_info = NULL;
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}
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void nsim_udp_tunnels_debugfs_create(struct nsim_dev *nsim_dev)
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{
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debugfs_create_bool("udp_ports_sync_all", 0600, nsim_dev->ddir,
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&nsim_dev->udp_ports.sync_all);
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debugfs_create_bool("udp_ports_open_only", 0600, nsim_dev->ddir,
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&nsim_dev->udp_ports.open_only);
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debugfs_create_bool("udp_ports_ipv4_only", 0600, nsim_dev->ddir,
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&nsim_dev->udp_ports.ipv4_only);
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debugfs_create_u32("udp_ports_sleep", 0600, nsim_dev->ddir,
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&nsim_dev->udp_ports.sleep);
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}
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