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16#include <linux/debugfs.h>
17#include <linux/etherdevice.h>
18#include <linux/kernel.h>
19#include <linux/module.h>
20#include <linux/netdevice.h>
21#include <linux/slab.h>
22#include <net/netlink.h>
23#include <net/pkt_cls.h>
24#include <net/rtnetlink.h>
25#include <net/udp_tunnel.h>
26
27#include "netdevsim.h"
28
29static netdev_tx_t nsim_start_xmit(struct sk_buff *skb, struct net_device *dev)
30{
31 struct netdevsim *ns = netdev_priv(dev);
32
33 if (!nsim_ipsec_tx(ns, skb))
34 goto out;
35
36 u64_stats_update_begin(&ns->syncp);
37 ns->tx_packets++;
38 ns->tx_bytes += skb->len;
39 u64_stats_update_end(&ns->syncp);
40
41out:
42 dev_kfree_skb(skb);
43
44 return NETDEV_TX_OK;
45}
46
47static void nsim_set_rx_mode(struct net_device *dev)
48{
49}
50
51static int nsim_change_mtu(struct net_device *dev, int new_mtu)
52{
53 struct netdevsim *ns = netdev_priv(dev);
54
55 if (ns->xdp.prog && new_mtu > NSIM_XDP_MAX_MTU)
56 return -EBUSY;
57
58 dev->mtu = new_mtu;
59
60 return 0;
61}
62
63static void
64nsim_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
65{
66 struct netdevsim *ns = netdev_priv(dev);
67 unsigned int start;
68
69 do {
70 start = u64_stats_fetch_begin(&ns->syncp);
71 stats->tx_bytes = ns->tx_bytes;
72 stats->tx_packets = ns->tx_packets;
73 } while (u64_stats_fetch_retry(&ns->syncp, start));
74}
75
76static int
77nsim_setup_tc_block_cb(enum tc_setup_type type, void *type_data, void *cb_priv)
78{
79 return nsim_bpf_setup_tc_block_cb(type, type_data, cb_priv);
80}
81
82static int nsim_set_vf_mac(struct net_device *dev, int vf, u8 *mac)
83{
84 struct netdevsim *ns = netdev_priv(dev);
85 struct nsim_bus_dev *nsim_bus_dev = ns->nsim_bus_dev;
86
87
88 if (vf >= nsim_bus_dev->num_vfs || is_multicast_ether_addr(mac))
89 return -EINVAL;
90 memcpy(nsim_bus_dev->vfconfigs[vf].vf_mac, mac, ETH_ALEN);
91
92 return 0;
93}
94
95static int nsim_set_vf_vlan(struct net_device *dev, int vf,
96 u16 vlan, u8 qos, __be16 vlan_proto)
97{
98 struct netdevsim *ns = netdev_priv(dev);
99 struct nsim_bus_dev *nsim_bus_dev = ns->nsim_bus_dev;
100
101 if (vf >= nsim_bus_dev->num_vfs || vlan > 4095 || qos > 7)
102 return -EINVAL;
103
104 nsim_bus_dev->vfconfigs[vf].vlan = vlan;
105 nsim_bus_dev->vfconfigs[vf].qos = qos;
106 nsim_bus_dev->vfconfigs[vf].vlan_proto = vlan_proto;
107
108 return 0;
109}
110
111static int nsim_set_vf_rate(struct net_device *dev, int vf, int min, int max)
112{
113 struct netdevsim *ns = netdev_priv(dev);
114 struct nsim_bus_dev *nsim_bus_dev = ns->nsim_bus_dev;
115
116 if (vf >= nsim_bus_dev->num_vfs)
117 return -EINVAL;
118
119 nsim_bus_dev->vfconfigs[vf].min_tx_rate = min;
120 nsim_bus_dev->vfconfigs[vf].max_tx_rate = max;
121
122 return 0;
123}
124
125static int nsim_set_vf_spoofchk(struct net_device *dev, int vf, bool val)
126{
127 struct netdevsim *ns = netdev_priv(dev);
128 struct nsim_bus_dev *nsim_bus_dev = ns->nsim_bus_dev;
129
130 if (vf >= nsim_bus_dev->num_vfs)
131 return -EINVAL;
132 nsim_bus_dev->vfconfigs[vf].spoofchk_enabled = val;
133
134 return 0;
135}
136
137static int nsim_set_vf_rss_query_en(struct net_device *dev, int vf, bool val)
138{
139 struct netdevsim *ns = netdev_priv(dev);
140 struct nsim_bus_dev *nsim_bus_dev = ns->nsim_bus_dev;
141
142 if (vf >= nsim_bus_dev->num_vfs)
143 return -EINVAL;
144 nsim_bus_dev->vfconfigs[vf].rss_query_enabled = val;
145
146 return 0;
147}
148
149static int nsim_set_vf_trust(struct net_device *dev, int vf, bool val)
150{
151 struct netdevsim *ns = netdev_priv(dev);
152 struct nsim_bus_dev *nsim_bus_dev = ns->nsim_bus_dev;
153
154 if (vf >= nsim_bus_dev->num_vfs)
155 return -EINVAL;
156 nsim_bus_dev->vfconfigs[vf].trusted = val;
157
158 return 0;
159}
160
161static int
162nsim_get_vf_config(struct net_device *dev, int vf, struct ifla_vf_info *ivi)
163{
164 struct netdevsim *ns = netdev_priv(dev);
165 struct nsim_bus_dev *nsim_bus_dev = ns->nsim_bus_dev;
166
167 if (vf >= nsim_bus_dev->num_vfs)
168 return -EINVAL;
169
170 ivi->vf = vf;
171 ivi->linkstate = nsim_bus_dev->vfconfigs[vf].link_state;
172 ivi->min_tx_rate = nsim_bus_dev->vfconfigs[vf].min_tx_rate;
173 ivi->max_tx_rate = nsim_bus_dev->vfconfigs[vf].max_tx_rate;
174 ivi->vlan = nsim_bus_dev->vfconfigs[vf].vlan;
175 ivi->vlan_proto = nsim_bus_dev->vfconfigs[vf].vlan_proto;
176 ivi->qos = nsim_bus_dev->vfconfigs[vf].qos;
177 memcpy(&ivi->mac, nsim_bus_dev->vfconfigs[vf].vf_mac, ETH_ALEN);
178 ivi->spoofchk = nsim_bus_dev->vfconfigs[vf].spoofchk_enabled;
179 ivi->trusted = nsim_bus_dev->vfconfigs[vf].trusted;
180 ivi->rss_query_en = nsim_bus_dev->vfconfigs[vf].rss_query_enabled;
181
182 return 0;
183}
184
185static int nsim_set_vf_link_state(struct net_device *dev, int vf, int state)
186{
187 struct netdevsim *ns = netdev_priv(dev);
188 struct nsim_bus_dev *nsim_bus_dev = ns->nsim_bus_dev;
189
190 if (vf >= nsim_bus_dev->num_vfs)
191 return -EINVAL;
192
193 switch (state) {
194 case IFLA_VF_LINK_STATE_AUTO:
195 case IFLA_VF_LINK_STATE_ENABLE:
196 case IFLA_VF_LINK_STATE_DISABLE:
197 break;
198 default:
199 return -EINVAL;
200 }
201
202 nsim_bus_dev->vfconfigs[vf].link_state = state;
203
204 return 0;
205}
206
207static LIST_HEAD(nsim_block_cb_list);
208
209static int
210nsim_setup_tc(struct net_device *dev, enum tc_setup_type type, void *type_data)
211{
212 struct netdevsim *ns = netdev_priv(dev);
213
214 switch (type) {
215 case TC_SETUP_BLOCK:
216 return flow_block_cb_setup_simple(type_data,
217 &nsim_block_cb_list,
218 nsim_setup_tc_block_cb,
219 ns, ns, true);
220 default:
221 return -EOPNOTSUPP;
222 }
223}
224
225static int
226nsim_set_features(struct net_device *dev, netdev_features_t features)
227{
228 struct netdevsim *ns = netdev_priv(dev);
229
230 if ((dev->features & NETIF_F_HW_TC) > (features & NETIF_F_HW_TC))
231 return nsim_bpf_disable_tc(ns);
232
233 return 0;
234}
235
236static struct devlink_port *nsim_get_devlink_port(struct net_device *dev)
237{
238 struct netdevsim *ns = netdev_priv(dev);
239
240 return &ns->nsim_dev_port->devlink_port;
241}
242
243static const struct net_device_ops nsim_netdev_ops = {
244 .ndo_start_xmit = nsim_start_xmit,
245 .ndo_set_rx_mode = nsim_set_rx_mode,
246 .ndo_set_mac_address = eth_mac_addr,
247 .ndo_validate_addr = eth_validate_addr,
248 .ndo_change_mtu = nsim_change_mtu,
249 .ndo_get_stats64 = nsim_get_stats64,
250 .ndo_set_vf_mac = nsim_set_vf_mac,
251 .ndo_set_vf_vlan = nsim_set_vf_vlan,
252 .ndo_set_vf_rate = nsim_set_vf_rate,
253 .ndo_set_vf_spoofchk = nsim_set_vf_spoofchk,
254 .ndo_set_vf_trust = nsim_set_vf_trust,
255 .ndo_get_vf_config = nsim_get_vf_config,
256 .ndo_set_vf_link_state = nsim_set_vf_link_state,
257 .ndo_set_vf_rss_query_en = nsim_set_vf_rss_query_en,
258 .ndo_setup_tc = nsim_setup_tc,
259 .ndo_set_features = nsim_set_features,
260 .ndo_bpf = nsim_bpf,
261 .ndo_udp_tunnel_add = udp_tunnel_nic_add_port,
262 .ndo_udp_tunnel_del = udp_tunnel_nic_del_port,
263 .ndo_get_devlink_port = nsim_get_devlink_port,
264};
265
266static void nsim_setup(struct net_device *dev)
267{
268 ether_setup(dev);
269 eth_hw_addr_random(dev);
270
271 dev->tx_queue_len = 0;
272 dev->flags |= IFF_NOARP;
273 dev->flags &= ~IFF_MULTICAST;
274 dev->priv_flags |= IFF_LIVE_ADDR_CHANGE |
275 IFF_NO_QUEUE;
276 dev->features |= NETIF_F_HIGHDMA |
277 NETIF_F_SG |
278 NETIF_F_FRAGLIST |
279 NETIF_F_HW_CSUM |
280 NETIF_F_TSO;
281 dev->hw_features |= NETIF_F_HW_TC;
282 dev->max_mtu = ETH_MAX_MTU;
283}
284
285struct netdevsim *
286nsim_create(struct nsim_dev *nsim_dev, struct nsim_dev_port *nsim_dev_port)
287{
288 struct net_device *dev;
289 struct netdevsim *ns;
290 int err;
291
292 dev = alloc_netdev(sizeof(*ns), "eth%d", NET_NAME_UNKNOWN, nsim_setup);
293 if (!dev)
294 return ERR_PTR(-ENOMEM);
295
296 dev_net_set(dev, nsim_dev_net(nsim_dev));
297 ns = netdev_priv(dev);
298 ns->netdev = dev;
299 ns->nsim_dev = nsim_dev;
300 ns->nsim_dev_port = nsim_dev_port;
301 ns->nsim_bus_dev = nsim_dev->nsim_bus_dev;
302 SET_NETDEV_DEV(dev, &ns->nsim_bus_dev->dev);
303 dev->netdev_ops = &nsim_netdev_ops;
304 nsim_ethtool_init(ns);
305
306 err = nsim_udp_tunnels_info_create(nsim_dev, dev);
307 if (err)
308 goto err_free_netdev;
309
310 rtnl_lock();
311 err = nsim_bpf_init(ns);
312 if (err)
313 goto err_utn_destroy;
314
315 nsim_ipsec_init(ns);
316
317 err = register_netdevice(dev);
318 if (err)
319 goto err_ipsec_teardown;
320 rtnl_unlock();
321
322 return ns;
323
324err_ipsec_teardown:
325 nsim_ipsec_teardown(ns);
326 nsim_bpf_uninit(ns);
327err_utn_destroy:
328 rtnl_unlock();
329 nsim_udp_tunnels_info_destroy(dev);
330err_free_netdev:
331 free_netdev(dev);
332 return ERR_PTR(err);
333}
334
335void nsim_destroy(struct netdevsim *ns)
336{
337 struct net_device *dev = ns->netdev;
338
339 rtnl_lock();
340 unregister_netdevice(dev);
341 nsim_ipsec_teardown(ns);
342 nsim_bpf_uninit(ns);
343 rtnl_unlock();
344 nsim_udp_tunnels_info_destroy(dev);
345 free_netdev(dev);
346}
347
348static int nsim_validate(struct nlattr *tb[], struct nlattr *data[],
349 struct netlink_ext_ack *extack)
350{
351 NL_SET_ERR_MSG_MOD(extack, "Please use: echo \"[ID] [PORT_COUNT]\" > /sys/bus/netdevsim/new_device");
352 return -EOPNOTSUPP;
353}
354
355static struct rtnl_link_ops nsim_link_ops __read_mostly = {
356 .kind = DRV_NAME,
357 .validate = nsim_validate,
358};
359
360static int __init nsim_module_init(void)
361{
362 int err;
363
364 err = nsim_dev_init();
365 if (err)
366 return err;
367
368 err = nsim_bus_init();
369 if (err)
370 goto err_dev_exit;
371
372 err = rtnl_link_register(&nsim_link_ops);
373 if (err)
374 goto err_bus_exit;
375
376 return 0;
377
378err_bus_exit:
379 nsim_bus_exit();
380err_dev_exit:
381 nsim_dev_exit();
382 return err;
383}
384
385static void __exit nsim_module_exit(void)
386{
387 rtnl_link_unregister(&nsim_link_ops);
388 nsim_bus_exit();
389 nsim_dev_exit();
390}
391
392module_init(nsim_module_init);
393module_exit(nsim_module_exit);
394MODULE_LICENSE("GPL");
395MODULE_ALIAS_RTNL_LINK(DRV_NAME);
396
