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netdevsim: shared UDP tunnel port table support 

Add the ability to simulate a device with a shared UDP tunnel port
table.

Try to reject the configurations and actions which are not supported
by the core, so we don't get syzcaller etc. warning reports.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jakub Kicinski 2020-09-25 17:56:42 -07:00 committed by David S. Miller
parent 860e9d328f
commit dc9c07537c
2 changed files with 22 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/net/netdevsim/netdevsim.h
View File

@ -20,6 +20,7 @@
#include <linux/netdevice.h>
#include <linux/u64_stats_sync.h>
#include <net/devlink.h>
#include <net/udp_tunnel.h>
#include <net/xdp.h>
#define DRV_NAME "netdevsim"
@ -84,7 +85,8 @@ struct netdevsim {
struct {
u32 inject_error;
u32 sleep;
u32 ports[2][NSIM_UDP_TUNNEL_N_PORTS];
u32 __ports[2][NSIM_UDP_TUNNEL_N_PORTS];
u32 (*ports)[NSIM_UDP_TUNNEL_N_PORTS];
struct debugfs_u32_array dfs_ports[2];
} udp_ports;
@ -209,9 +211,12 @@ struct nsim_dev {
bool fail_trap_policer_set;
bool fail_trap_policer_counter_get;
struct {
struct udp_tunnel_nic_shared utn_shared;
u32 __ports[2][NSIM_UDP_TUNNEL_N_PORTS];
bool sync_all;
bool open_only;
bool ipv4_only;
bool shared;
u32 sleep;
} udp_ports;
};

17
drivers/net/netdevsim/udp_tunnels.c
View File

@ -112,7 +112,7 @@ nsim_udp_tunnels_info_reset_write(struct file *file, const char __user *data,
struct net_device *dev = file->private_data;
struct netdevsim *ns = netdev_priv(dev);
memset(&ns->udp_ports.ports, 0, sizeof(ns->udp_ports.ports));
memset(ns->udp_ports.ports, 0, sizeof(ns->udp_ports.__ports));
rtnl_lock();
udp_tunnel_nic_reset_ntf(dev);
rtnl_unlock();
@ -132,6 +132,17 @@ int nsim_udp_tunnels_info_create(struct nsim_dev *nsim_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);
@ -173,6 +184,8 @@ int nsim_udp_tunnels_info_create(struct nsim_dev *nsim_dev,
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;
dev->udp_tunnel_nic_info = info;
return 0;
@ -192,6 +205,8 @@ void nsim_udp_tunnels_debugfs_create(struct nsim_dev *nsim_dev)
&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_u32("udp_ports_sleep", 0600, nsim_dev->ddir,
&nsim_dev->udp_ports.sleep);
}