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// SPDX-License-Identifier: GPL-2.0-only
// Copyright (c) 2020 Facebook Inc.
#include <linux/debugfs.h>
#include <linux/netdevice.h>
#include <linux/slab.h>
#include <net/udp_tunnel.h>
#include "netdevsim.h"
static int
nsim_udp_tunnel_set_port(struct net_device *dev, unsigned int table,
unsigned int entry, struct udp_tunnel_info *ti)
{
struct netdevsim *ns = netdev_priv(dev);
int ret;
ret = -ns->udp_ports.inject_error;
ns->udp_ports.inject_error = 0;
if (ns->udp_ports.sleep)
msleep(ns->udp_ports.sleep);
if (!ret) {
if (ns->udp_ports.ports[table][entry]) {
WARN(1, "entry already in use\n");
ret = -EBUSY;
} else {
ns->udp_ports.ports[table][entry] =
be16_to_cpu(ti->port) << 16 | ti->type;
}
}
netdev_info(dev, "set [%d, %d] type %d family %d port %d - %d\n",
table, entry, ti->type, ti->sa_family, ntohs(ti->port),
ret);
return ret;
}
static int
nsim_udp_tunnel_unset_port(struct net_device *dev, unsigned int table,
unsigned int entry, struct udp_tunnel_info *ti)
{
struct netdevsim *ns = netdev_priv(dev);
int ret;
ret = -ns->udp_ports.inject_error;
ns->udp_ports.inject_error = 0;
if (ns->udp_ports.sleep)
msleep(ns->udp_ports.sleep);
if (!ret) {
u32 val = be16_to_cpu(ti->port) << 16 | ti->type;
if (val == ns->udp_ports.ports[table][entry]) {
ns->udp_ports.ports[table][entry] = 0;
} else {
WARN(1, "entry not installed %x vs %x\n",
val, ns->udp_ports.ports[table][entry]);
ret = -ENOENT;
}
}
netdev_info(dev, "unset [%d, %d] type %d family %d port %d - %d\n",
table, entry, ti->type, ti->sa_family, ntohs(ti->port),
ret);
return ret;
}
static int
nsim_udp_tunnel_sync_table(struct net_device *dev, unsigned int table)
{
struct netdevsim *ns = netdev_priv(dev);
struct udp_tunnel_info ti;
unsigned int i;
int ret;
ret = -ns->udp_ports.inject_error;
ns->udp_ports.inject_error = 0;
for (i = 0; i < NSIM_UDP_TUNNEL_N_PORTS; i++) {
udp_tunnel_nic_get_port(dev, table, i, &ti);
ns->udp_ports.ports[table][i] =
be16_to_cpu(ti.port) << 16 | ti.type;
}
return ret;
}
static const struct udp_tunnel_nic_info nsim_udp_tunnel_info = {
.set_port = nsim_udp_tunnel_set_port,
.unset_port = nsim_udp_tunnel_unset_port,
.sync_table = nsim_udp_tunnel_sync_table,
.tables = {
{
.n_entries = NSIM_UDP_TUNNEL_N_PORTS,
.tunnel_types = UDP_TUNNEL_TYPE_VXLAN,
},
{
.n_entries = NSIM_UDP_TUNNEL_N_PORTS,
.tunnel_types = UDP_TUNNEL_TYPE_GENEVE |
UDP_TUNNEL_TYPE_VXLAN_GPE,
},
},
};
static ssize_t
nsim_udp_tunnels_info_reset_write(struct file *file, const char __user *data,
size_t count, loff_t *ppos)
{
struct net_device *dev = file->private_data;
struct netdevsim *ns = netdev_priv(dev);
memset(ns->udp_ports.ports, 0, sizeof(ns->udp_ports.__ports));
rtnl_lock();
udp_tunnel_nic_reset_ntf(dev);
rtnl_unlock();
return count;
}
static const struct file_operations nsim_udp_tunnels_info_reset_fops = {
.open = simple_open,
.write = nsim_udp_tunnels_info_reset_write,
.llseek = generic_file_llseek,
};
int nsim_udp_tunnels_info_create(struct nsim_dev *nsim_dev,
struct net_device *dev)
{
struct netdevsim *ns = netdev_priv(dev);
struct udp_tunnel_nic_info *info;
if (nsim_dev->udp_ports.shared && nsim_dev->udp_ports.open_only) {
dev_err(&nsim_dev->nsim_bus_dev->dev,
"shared can't be used in conjunction with open_only\n");
return -EINVAL;
}
if (!nsim_dev->udp_ports.shared)
ns->udp_ports.ports = ns->udp_ports.__ports;
else
ns->udp_ports.ports = nsim_dev->udp_ports.__ports;
debugfs_create_u32("udp_ports_inject_error", 0600,
ns->nsim_dev_port->ddir,
&ns->udp_ports.inject_error);
ns->udp_ports.dfs_ports[0].array = ns->udp_ports.ports[0];
ns->udp_ports.dfs_ports[0].n_elements = NSIM_UDP_TUNNEL_N_PORTS;
debugfs_create_u32_array("udp_ports_table0", 0400,
ns->nsim_dev_port->ddir,
&ns->udp_ports.dfs_ports[0]);
ns->udp_ports.dfs_ports[1].array = ns->udp_ports.ports[1];
ns->udp_ports.dfs_ports[1].n_elements = NSIM_UDP_TUNNEL_N_PORTS;
debugfs_create_u32_array("udp_ports_table1", 0400,
ns->nsim_dev_port->ddir,
&ns->udp_ports.dfs_ports[1]);
debugfs_create_file("udp_ports_reset", 0200, ns->nsim_dev_port->ddir,
dev, &nsim_udp_tunnels_info_reset_fops);
/* Note: it's not normal to allocate the info struct like this!
* Drivers are expected to use a static const one, here we're testing.
*/
info = kmemdup(&nsim_udp_tunnel_info, sizeof(nsim_udp_tunnel_info),
GFP_KERNEL);
if (!info)
return -ENOMEM;
ns->udp_ports.sleep = nsim_dev->udp_ports.sleep;
if (nsim_dev->udp_ports.sync_all) {
info->set_port = NULL;
info->unset_port = NULL;
} else {
info->sync_table = NULL;
}
if (ns->udp_ports.sleep)
info->flags |= UDP_TUNNEL_NIC_INFO_MAY_SLEEP;
if (nsim_dev->udp_ports.open_only)
info->flags |= UDP_TUNNEL_NIC_INFO_OPEN_ONLY;
if (nsim_dev->udp_ports.ipv4_only)
info->flags |= UDP_TUNNEL_NIC_INFO_IPV4_ONLY;
if (nsim_dev->udp_ports.shared)
info->shared = &nsim_dev->udp_ports.utn_shared;
if (nsim_dev->udp_ports.static_iana_vxlan)
info->flags |= UDP_TUNNEL_NIC_INFO_STATIC_IANA_VXLAN;
dev->udp_tunnel_nic_info = info;
return 0;
}
void nsim_udp_tunnels_info_destroy(struct net_device *dev)
{
kfree(dev->udp_tunnel_nic_info);
dev->udp_tunnel_nic_info = NULL;
}
void nsim_udp_tunnels_debugfs_create(struct nsim_dev *nsim_dev)
{
debugfs_create_bool("udp_ports_sync_all", 0600, nsim_dev->ddir,
&nsim_dev->udp_ports.sync_all);
debugfs_create_bool("udp_ports_open_only", 0600, nsim_dev->ddir,
&nsim_dev->udp_ports.open_only);
debugfs_create_bool("udp_ports_ipv4_only", 0600, nsim_dev->ddir,
&nsim_dev->udp_ports.ipv4_only);
debugfs_create_bool("udp_ports_shared", 0600, nsim_dev->ddir,
&nsim_dev->udp_ports.shared);
debugfs_create_bool("udp_ports_static_iana_vxlan", 0600, nsim_dev->ddir,
&nsim_dev->udp_ports.static_iana_vxlan);
debugfs_create_u32("udp_ports_sleep", 0600, nsim_dev->ddir,
&nsim_dev->udp_ports.sleep);
}
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