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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>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,192 @@ | ||
| // 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]) | ||
| 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 | ||
| 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; | ||
|
|
||
| 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; | ||
|
|
||
| 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_u32("udp_ports_sleep", 0600, nsim_dev->ddir, | ||
| &nsim_dev->udp_ports.sleep); | ||
| } |