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1/*
2 * Copyright (C) 2017 Netronome Systems, Inc.
3 *
4 * This software is licensed under the GNU General License Version 2,
5 * June 1991 as shown in the file COPYING in the top-level directory of this
6 * source tree.
7 *
8 * THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS"
9 * WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
10 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
11 * FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE
12 * OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME
13 * THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
14 */
15
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_dev *nsim_dev = ns->nsim_dev;
86
87 /* Only refuse multicast addresses, zero address can mean unset/any. */
88 if (vf >= nsim_dev_get_vfs(nsim_dev) || is_multicast_ether_addr(mac))
89 return -EINVAL;
90 memcpy(nsim_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_dev *nsim_dev = ns->nsim_dev;
100
101 if (vf >= nsim_dev_get_vfs(nsim_dev) || vlan > 4095 || qos > 7)
102 return -EINVAL;
103
104 nsim_dev->vfconfigs[vf].vlan = vlan;
105 nsim_dev->vfconfigs[vf].qos = qos;
106 nsim_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_dev *nsim_dev = ns->nsim_dev;
115
116 if (nsim_esw_mode_is_switchdev(ns->nsim_dev)) {
117 pr_err("Not supported in switchdev mode. Please use devlink API.\n");
118 return -EOPNOTSUPP;
119 }
120
121 if (vf >= nsim_dev_get_vfs(nsim_dev))
122 return -EINVAL;
123
124 nsim_dev->vfconfigs[vf].min_tx_rate = min;
125 nsim_dev->vfconfigs[vf].max_tx_rate = max;
126
127 return 0;
128}
129
130static int nsim_set_vf_spoofchk(struct net_device *dev, int vf, bool val)
131{
132 struct netdevsim *ns = netdev_priv(dev);
133 struct nsim_dev *nsim_dev = ns->nsim_dev;
134
135 if (vf >= nsim_dev_get_vfs(nsim_dev))
136 return -EINVAL;
137 nsim_dev->vfconfigs[vf].spoofchk_enabled = val;
138
139 return 0;
140}
141
142static int nsim_set_vf_rss_query_en(struct net_device *dev, int vf, bool val)
143{
144 struct netdevsim *ns = netdev_priv(dev);
145 struct nsim_dev *nsim_dev = ns->nsim_dev;
146
147 if (vf >= nsim_dev_get_vfs(nsim_dev))
148 return -EINVAL;
149 nsim_dev->vfconfigs[vf].rss_query_enabled = val;
150
151 return 0;
152}
153
154static int nsim_set_vf_trust(struct net_device *dev, int vf, bool val)
155{
156 struct netdevsim *ns = netdev_priv(dev);
157 struct nsim_dev *nsim_dev = ns->nsim_dev;
158
159 if (vf >= nsim_dev_get_vfs(nsim_dev))
160 return -EINVAL;
161 nsim_dev->vfconfigs[vf].trusted = val;
162
163 return 0;
164}
165
166static int
167nsim_get_vf_config(struct net_device *dev, int vf, struct ifla_vf_info *ivi)
168{
169 struct netdevsim *ns = netdev_priv(dev);
170 struct nsim_dev *nsim_dev = ns->nsim_dev;
171
172 if (vf >= nsim_dev_get_vfs(nsim_dev))
173 return -EINVAL;
174
175 ivi->vf = vf;
176 ivi->linkstate = nsim_dev->vfconfigs[vf].link_state;
177 ivi->min_tx_rate = nsim_dev->vfconfigs[vf].min_tx_rate;
178 ivi->max_tx_rate = nsim_dev->vfconfigs[vf].max_tx_rate;
179 ivi->vlan = nsim_dev->vfconfigs[vf].vlan;
180 ivi->vlan_proto = nsim_dev->vfconfigs[vf].vlan_proto;
181 ivi->qos = nsim_dev->vfconfigs[vf].qos;
182 memcpy(&ivi->mac, nsim_dev->vfconfigs[vf].vf_mac, ETH_ALEN);
183 ivi->spoofchk = nsim_dev->vfconfigs[vf].spoofchk_enabled;
184 ivi->trusted = nsim_dev->vfconfigs[vf].trusted;
185 ivi->rss_query_en = nsim_dev->vfconfigs[vf].rss_query_enabled;
186
187 return 0;
188}
189
190static int nsim_set_vf_link_state(struct net_device *dev, int vf, int state)
191{
192 struct netdevsim *ns = netdev_priv(dev);
193 struct nsim_dev *nsim_dev = ns->nsim_dev;
194
195 if (vf >= nsim_dev_get_vfs(nsim_dev))
196 return -EINVAL;
197
198 switch (state) {
199 case IFLA_VF_LINK_STATE_AUTO:
200 case IFLA_VF_LINK_STATE_ENABLE:
201 case IFLA_VF_LINK_STATE_DISABLE:
202 break;
203 default:
204 return -EINVAL;
205 }
206
207 nsim_dev->vfconfigs[vf].link_state = state;
208
209 return 0;
210}
211
212static void nsim_taprio_stats(struct tc_taprio_qopt_stats *stats)
213{
214 stats->window_drops = 0;
215 stats->tx_overruns = 0;
216}
217
218static int nsim_setup_tc_taprio(struct net_device *dev,
219 struct tc_taprio_qopt_offload *offload)
220{
221 int err = 0;
222
223 switch (offload->cmd) {
224 case TAPRIO_CMD_REPLACE:
225 case TAPRIO_CMD_DESTROY:
226 break;
227 case TAPRIO_CMD_STATS:
228 nsim_taprio_stats(&offload->stats);
229 break;
230 default:
231 err = -EOPNOTSUPP;
232 }
233
234 return err;
235}
236
237static LIST_HEAD(nsim_block_cb_list);
238
239static int
240nsim_setup_tc(struct net_device *dev, enum tc_setup_type type, void *type_data)
241{
242 struct netdevsim *ns = netdev_priv(dev);
243
244 switch (type) {
245 case TC_SETUP_QDISC_TAPRIO:
246 return nsim_setup_tc_taprio(dev, type_data);
247 case TC_SETUP_BLOCK:
248 return flow_block_cb_setup_simple(type_data,
249 &nsim_block_cb_list,
250 nsim_setup_tc_block_cb,
251 ns, ns, true);
252 default:
253 return -EOPNOTSUPP;
254 }
255}
256
257static int
258nsim_set_features(struct net_device *dev, netdev_features_t features)
259{
260 struct netdevsim *ns = netdev_priv(dev);
261
262 if ((dev->features & NETIF_F_HW_TC) > (features & NETIF_F_HW_TC))
263 return nsim_bpf_disable_tc(ns);
264
265 return 0;
266}
267
268static const struct net_device_ops nsim_netdev_ops = {
269 .ndo_start_xmit = nsim_start_xmit,
270 .ndo_set_rx_mode = nsim_set_rx_mode,
271 .ndo_set_mac_address = eth_mac_addr,
272 .ndo_validate_addr = eth_validate_addr,
273 .ndo_change_mtu = nsim_change_mtu,
274 .ndo_get_stats64 = nsim_get_stats64,
275 .ndo_set_vf_mac = nsim_set_vf_mac,
276 .ndo_set_vf_vlan = nsim_set_vf_vlan,
277 .ndo_set_vf_rate = nsim_set_vf_rate,
278 .ndo_set_vf_spoofchk = nsim_set_vf_spoofchk,
279 .ndo_set_vf_trust = nsim_set_vf_trust,
280 .ndo_get_vf_config = nsim_get_vf_config,
281 .ndo_set_vf_link_state = nsim_set_vf_link_state,
282 .ndo_set_vf_rss_query_en = nsim_set_vf_rss_query_en,
283 .ndo_setup_tc = nsim_setup_tc,
284 .ndo_set_features = nsim_set_features,
285 .ndo_bpf = nsim_bpf,
286};
287
288static const struct net_device_ops nsim_vf_netdev_ops = {
289 .ndo_start_xmit = nsim_start_xmit,
290 .ndo_set_rx_mode = nsim_set_rx_mode,
291 .ndo_set_mac_address = eth_mac_addr,
292 .ndo_validate_addr = eth_validate_addr,
293 .ndo_change_mtu = nsim_change_mtu,
294 .ndo_get_stats64 = nsim_get_stats64,
295 .ndo_setup_tc = nsim_setup_tc,
296 .ndo_set_features = nsim_set_features,
297};
298
299static void nsim_setup(struct net_device *dev)
300{
301 ether_setup(dev);
302 eth_hw_addr_random(dev);
303
304 dev->tx_queue_len = 0;
305 dev->flags |= IFF_NOARP;
306 dev->flags &= ~IFF_MULTICAST;
307 dev->priv_flags |= IFF_LIVE_ADDR_CHANGE |
308 IFF_NO_QUEUE;
309 dev->features |= NETIF_F_HIGHDMA |
310 NETIF_F_SG |
311 NETIF_F_FRAGLIST |
312 NETIF_F_HW_CSUM |
313 NETIF_F_TSO;
314 dev->hw_features |= NETIF_F_HW_TC;
315 dev->max_mtu = ETH_MAX_MTU;
316 dev->xdp_features = NETDEV_XDP_ACT_HW_OFFLOAD;
317}
318
319static int nsim_init_netdevsim(struct netdevsim *ns)
320{
321 struct mock_phc *phc;
322 int err;
323
324 phc = mock_phc_create(&ns->nsim_bus_dev->dev);
325 if (IS_ERR(phc))
326 return PTR_ERR(phc);
327
328 ns->phc = phc;
329 ns->netdev->netdev_ops = &nsim_netdev_ops;
330
331 err = nsim_udp_tunnels_info_create(ns->nsim_dev, ns->netdev);
332 if (err)
333 goto err_phc_destroy;
334
335 rtnl_lock();
336 err = nsim_bpf_init(ns);
337 if (err)
338 goto err_utn_destroy;
339
340 nsim_macsec_init(ns);
341 nsim_ipsec_init(ns);
342
343 err = register_netdevice(ns->netdev);
344 if (err)
345 goto err_ipsec_teardown;
346 rtnl_unlock();
347 return 0;
348
349err_ipsec_teardown:
350 nsim_ipsec_teardown(ns);
351 nsim_macsec_teardown(ns);
352 nsim_bpf_uninit(ns);
353err_utn_destroy:
354 rtnl_unlock();
355 nsim_udp_tunnels_info_destroy(ns->netdev);
356err_phc_destroy:
357 mock_phc_destroy(ns->phc);
358 return err;
359}
360
361static int nsim_init_netdevsim_vf(struct netdevsim *ns)
362{
363 int err;
364
365 ns->netdev->netdev_ops = &nsim_vf_netdev_ops;
366 rtnl_lock();
367 err = register_netdevice(ns->netdev);
368 rtnl_unlock();
369 return err;
370}
371
372static void nsim_exit_netdevsim(struct netdevsim *ns)
373{
374 nsim_udp_tunnels_info_destroy(ns->netdev);
375 mock_phc_destroy(ns->phc);
376}
377
378struct netdevsim *
379nsim_create(struct nsim_dev *nsim_dev, struct nsim_dev_port *nsim_dev_port)
380{
381 struct net_device *dev;
382 struct netdevsim *ns;
383 int err;
384
385 dev = alloc_netdev_mq(sizeof(*ns), "eth%d", NET_NAME_UNKNOWN, nsim_setup,
386 nsim_dev->nsim_bus_dev->num_queues);
387 if (!dev)
388 return ERR_PTR(-ENOMEM);
389
390 dev_net_set(dev, nsim_dev_net(nsim_dev));
391 ns = netdev_priv(dev);
392 ns->netdev = dev;
393 u64_stats_init(&ns->syncp);
394 ns->nsim_dev = nsim_dev;
395 ns->nsim_dev_port = nsim_dev_port;
396 ns->nsim_bus_dev = nsim_dev->nsim_bus_dev;
397 SET_NETDEV_DEV(dev, &ns->nsim_bus_dev->dev);
398 SET_NETDEV_DEVLINK_PORT(dev, &nsim_dev_port->devlink_port);
399 nsim_ethtool_init(ns);
400 if (nsim_dev_port_is_pf(nsim_dev_port))
401 err = nsim_init_netdevsim(ns);
402 else
403 err = nsim_init_netdevsim_vf(ns);
404 if (err)
405 goto err_free_netdev;
406 return ns;
407
408err_free_netdev:
409 free_netdev(dev);
410 return ERR_PTR(err);
411}
412
413void nsim_destroy(struct netdevsim *ns)
414{
415 struct net_device *dev = ns->netdev;
416
417 rtnl_lock();
418 unregister_netdevice(dev);
419 if (nsim_dev_port_is_pf(ns->nsim_dev_port)) {
420 nsim_macsec_teardown(ns);
421 nsim_ipsec_teardown(ns);
422 nsim_bpf_uninit(ns);
423 }
424 rtnl_unlock();
425 if (nsim_dev_port_is_pf(ns->nsim_dev_port))
426 nsim_exit_netdevsim(ns);
427 free_netdev(dev);
428}
429
430static int nsim_validate(struct nlattr *tb[], struct nlattr *data[],
431 struct netlink_ext_ack *extack)
432{
433 NL_SET_ERR_MSG_MOD(extack,
434 "Please use: echo \"[ID] [PORT_COUNT] [NUM_QUEUES]\" > /sys/bus/netdevsim/new_device");
435 return -EOPNOTSUPP;
436}
437
438static struct rtnl_link_ops nsim_link_ops __read_mostly = {
439 .kind = DRV_NAME,
440 .validate = nsim_validate,
441};
442
443static int __init nsim_module_init(void)
444{
445 int err;
446
447 err = nsim_dev_init();
448 if (err)
449 return err;
450
451 err = nsim_bus_init();
452 if (err)
453 goto err_dev_exit;
454
455 err = rtnl_link_register(&nsim_link_ops);
456 if (err)
457 goto err_bus_exit;
458
459 return 0;
460
461err_bus_exit:
462 nsim_bus_exit();
463err_dev_exit:
464 nsim_dev_exit();
465 return err;
466}
467
468static void __exit nsim_module_exit(void)
469{
470 rtnl_link_unregister(&nsim_link_ops);
471 nsim_bus_exit();
472 nsim_dev_exit();
473}
474
475module_init(nsim_module_init);
476module_exit(nsim_module_exit);
477MODULE_LICENSE("GPL");
478MODULE_DESCRIPTION("Simulated networking device for testing");
479MODULE_ALIAS_RTNL_LINK(DRV_NAME);
1/*
2 * Copyright (C) 2017 Netronome Systems, Inc.
3 *
4 * This software is licensed under the GNU General License Version 2,
5 * June 1991 as shown in the file COPYING in the top-level directory of this
6 * source tree.
7 *
8 * THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS"
9 * WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
10 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
11 * FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE
12 * OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME
13 * THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
14 */
15
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 unsigned int len = skb->len;
33 struct netdevsim *peer_ns;
34
35 rcu_read_lock();
36 if (!nsim_ipsec_tx(ns, skb))
37 goto out_drop_free;
38
39 peer_ns = rcu_dereference(ns->peer);
40 if (!peer_ns)
41 goto out_drop_free;
42
43 skb_tx_timestamp(skb);
44 if (unlikely(dev_forward_skb(peer_ns->netdev, skb) == NET_RX_DROP))
45 goto out_drop_cnt;
46
47 rcu_read_unlock();
48 u64_stats_update_begin(&ns->syncp);
49 ns->tx_packets++;
50 ns->tx_bytes += len;
51 u64_stats_update_end(&ns->syncp);
52 return NETDEV_TX_OK;
53
54out_drop_free:
55 dev_kfree_skb(skb);
56out_drop_cnt:
57 rcu_read_unlock();
58 u64_stats_update_begin(&ns->syncp);
59 ns->tx_dropped++;
60 u64_stats_update_end(&ns->syncp);
61 return NETDEV_TX_OK;
62}
63
64static void nsim_set_rx_mode(struct net_device *dev)
65{
66}
67
68static int nsim_change_mtu(struct net_device *dev, int new_mtu)
69{
70 struct netdevsim *ns = netdev_priv(dev);
71
72 if (ns->xdp.prog && new_mtu > NSIM_XDP_MAX_MTU)
73 return -EBUSY;
74
75 dev->mtu = new_mtu;
76
77 return 0;
78}
79
80static void
81nsim_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
82{
83 struct netdevsim *ns = netdev_priv(dev);
84 unsigned int start;
85
86 do {
87 start = u64_stats_fetch_begin(&ns->syncp);
88 stats->tx_bytes = ns->tx_bytes;
89 stats->tx_packets = ns->tx_packets;
90 stats->tx_dropped = ns->tx_dropped;
91 } while (u64_stats_fetch_retry(&ns->syncp, start));
92}
93
94static int
95nsim_setup_tc_block_cb(enum tc_setup_type type, void *type_data, void *cb_priv)
96{
97 return nsim_bpf_setup_tc_block_cb(type, type_data, cb_priv);
98}
99
100static int nsim_set_vf_mac(struct net_device *dev, int vf, u8 *mac)
101{
102 struct netdevsim *ns = netdev_priv(dev);
103 struct nsim_dev *nsim_dev = ns->nsim_dev;
104
105 /* Only refuse multicast addresses, zero address can mean unset/any. */
106 if (vf >= nsim_dev_get_vfs(nsim_dev) || is_multicast_ether_addr(mac))
107 return -EINVAL;
108 memcpy(nsim_dev->vfconfigs[vf].vf_mac, mac, ETH_ALEN);
109
110 return 0;
111}
112
113static int nsim_set_vf_vlan(struct net_device *dev, int vf,
114 u16 vlan, u8 qos, __be16 vlan_proto)
115{
116 struct netdevsim *ns = netdev_priv(dev);
117 struct nsim_dev *nsim_dev = ns->nsim_dev;
118
119 if (vf >= nsim_dev_get_vfs(nsim_dev) || vlan > 4095 || qos > 7)
120 return -EINVAL;
121
122 nsim_dev->vfconfigs[vf].vlan = vlan;
123 nsim_dev->vfconfigs[vf].qos = qos;
124 nsim_dev->vfconfigs[vf].vlan_proto = vlan_proto;
125
126 return 0;
127}
128
129static int nsim_set_vf_rate(struct net_device *dev, int vf, int min, int max)
130{
131 struct netdevsim *ns = netdev_priv(dev);
132 struct nsim_dev *nsim_dev = ns->nsim_dev;
133
134 if (nsim_esw_mode_is_switchdev(ns->nsim_dev)) {
135 pr_err("Not supported in switchdev mode. Please use devlink API.\n");
136 return -EOPNOTSUPP;
137 }
138
139 if (vf >= nsim_dev_get_vfs(nsim_dev))
140 return -EINVAL;
141
142 nsim_dev->vfconfigs[vf].min_tx_rate = min;
143 nsim_dev->vfconfigs[vf].max_tx_rate = max;
144
145 return 0;
146}
147
148static int nsim_set_vf_spoofchk(struct net_device *dev, int vf, bool val)
149{
150 struct netdevsim *ns = netdev_priv(dev);
151 struct nsim_dev *nsim_dev = ns->nsim_dev;
152
153 if (vf >= nsim_dev_get_vfs(nsim_dev))
154 return -EINVAL;
155 nsim_dev->vfconfigs[vf].spoofchk_enabled = val;
156
157 return 0;
158}
159
160static int nsim_set_vf_rss_query_en(struct net_device *dev, int vf, bool val)
161{
162 struct netdevsim *ns = netdev_priv(dev);
163 struct nsim_dev *nsim_dev = ns->nsim_dev;
164
165 if (vf >= nsim_dev_get_vfs(nsim_dev))
166 return -EINVAL;
167 nsim_dev->vfconfigs[vf].rss_query_enabled = val;
168
169 return 0;
170}
171
172static int nsim_set_vf_trust(struct net_device *dev, int vf, bool val)
173{
174 struct netdevsim *ns = netdev_priv(dev);
175 struct nsim_dev *nsim_dev = ns->nsim_dev;
176
177 if (vf >= nsim_dev_get_vfs(nsim_dev))
178 return -EINVAL;
179 nsim_dev->vfconfigs[vf].trusted = val;
180
181 return 0;
182}
183
184static int
185nsim_get_vf_config(struct net_device *dev, int vf, struct ifla_vf_info *ivi)
186{
187 struct netdevsim *ns = netdev_priv(dev);
188 struct nsim_dev *nsim_dev = ns->nsim_dev;
189
190 if (vf >= nsim_dev_get_vfs(nsim_dev))
191 return -EINVAL;
192
193 ivi->vf = vf;
194 ivi->linkstate = nsim_dev->vfconfigs[vf].link_state;
195 ivi->min_tx_rate = nsim_dev->vfconfigs[vf].min_tx_rate;
196 ivi->max_tx_rate = nsim_dev->vfconfigs[vf].max_tx_rate;
197 ivi->vlan = nsim_dev->vfconfigs[vf].vlan;
198 ivi->vlan_proto = nsim_dev->vfconfigs[vf].vlan_proto;
199 ivi->qos = nsim_dev->vfconfigs[vf].qos;
200 memcpy(&ivi->mac, nsim_dev->vfconfigs[vf].vf_mac, ETH_ALEN);
201 ivi->spoofchk = nsim_dev->vfconfigs[vf].spoofchk_enabled;
202 ivi->trusted = nsim_dev->vfconfigs[vf].trusted;
203 ivi->rss_query_en = nsim_dev->vfconfigs[vf].rss_query_enabled;
204
205 return 0;
206}
207
208static int nsim_set_vf_link_state(struct net_device *dev, int vf, int state)
209{
210 struct netdevsim *ns = netdev_priv(dev);
211 struct nsim_dev *nsim_dev = ns->nsim_dev;
212
213 if (vf >= nsim_dev_get_vfs(nsim_dev))
214 return -EINVAL;
215
216 switch (state) {
217 case IFLA_VF_LINK_STATE_AUTO:
218 case IFLA_VF_LINK_STATE_ENABLE:
219 case IFLA_VF_LINK_STATE_DISABLE:
220 break;
221 default:
222 return -EINVAL;
223 }
224
225 nsim_dev->vfconfigs[vf].link_state = state;
226
227 return 0;
228}
229
230static void nsim_taprio_stats(struct tc_taprio_qopt_stats *stats)
231{
232 stats->window_drops = 0;
233 stats->tx_overruns = 0;
234}
235
236static int nsim_setup_tc_taprio(struct net_device *dev,
237 struct tc_taprio_qopt_offload *offload)
238{
239 int err = 0;
240
241 switch (offload->cmd) {
242 case TAPRIO_CMD_REPLACE:
243 case TAPRIO_CMD_DESTROY:
244 break;
245 case TAPRIO_CMD_STATS:
246 nsim_taprio_stats(&offload->stats);
247 break;
248 default:
249 err = -EOPNOTSUPP;
250 }
251
252 return err;
253}
254
255static LIST_HEAD(nsim_block_cb_list);
256
257static int
258nsim_setup_tc(struct net_device *dev, enum tc_setup_type type, void *type_data)
259{
260 struct netdevsim *ns = netdev_priv(dev);
261
262 switch (type) {
263 case TC_SETUP_QDISC_TAPRIO:
264 return nsim_setup_tc_taprio(dev, type_data);
265 case TC_SETUP_BLOCK:
266 return flow_block_cb_setup_simple(type_data,
267 &nsim_block_cb_list,
268 nsim_setup_tc_block_cb,
269 ns, ns, true);
270 default:
271 return -EOPNOTSUPP;
272 }
273}
274
275static int
276nsim_set_features(struct net_device *dev, netdev_features_t features)
277{
278 struct netdevsim *ns = netdev_priv(dev);
279
280 if ((dev->features & NETIF_F_HW_TC) > (features & NETIF_F_HW_TC))
281 return nsim_bpf_disable_tc(ns);
282
283 return 0;
284}
285
286static int nsim_get_iflink(const struct net_device *dev)
287{
288 struct netdevsim *nsim, *peer;
289 int iflink;
290
291 nsim = netdev_priv(dev);
292
293 rcu_read_lock();
294 peer = rcu_dereference(nsim->peer);
295 iflink = peer ? READ_ONCE(peer->netdev->ifindex) : 0;
296 rcu_read_unlock();
297
298 return iflink;
299}
300
301static const struct net_device_ops nsim_netdev_ops = {
302 .ndo_start_xmit = nsim_start_xmit,
303 .ndo_set_rx_mode = nsim_set_rx_mode,
304 .ndo_set_mac_address = eth_mac_addr,
305 .ndo_validate_addr = eth_validate_addr,
306 .ndo_change_mtu = nsim_change_mtu,
307 .ndo_get_stats64 = nsim_get_stats64,
308 .ndo_set_vf_mac = nsim_set_vf_mac,
309 .ndo_set_vf_vlan = nsim_set_vf_vlan,
310 .ndo_set_vf_rate = nsim_set_vf_rate,
311 .ndo_set_vf_spoofchk = nsim_set_vf_spoofchk,
312 .ndo_set_vf_trust = nsim_set_vf_trust,
313 .ndo_get_vf_config = nsim_get_vf_config,
314 .ndo_set_vf_link_state = nsim_set_vf_link_state,
315 .ndo_set_vf_rss_query_en = nsim_set_vf_rss_query_en,
316 .ndo_setup_tc = nsim_setup_tc,
317 .ndo_set_features = nsim_set_features,
318 .ndo_get_iflink = nsim_get_iflink,
319 .ndo_bpf = nsim_bpf,
320};
321
322static const struct net_device_ops nsim_vf_netdev_ops = {
323 .ndo_start_xmit = nsim_start_xmit,
324 .ndo_set_rx_mode = nsim_set_rx_mode,
325 .ndo_set_mac_address = eth_mac_addr,
326 .ndo_validate_addr = eth_validate_addr,
327 .ndo_change_mtu = nsim_change_mtu,
328 .ndo_get_stats64 = nsim_get_stats64,
329 .ndo_setup_tc = nsim_setup_tc,
330 .ndo_set_features = nsim_set_features,
331};
332
333static void nsim_setup(struct net_device *dev)
334{
335 ether_setup(dev);
336 eth_hw_addr_random(dev);
337
338 dev->tx_queue_len = 0;
339 dev->flags &= ~IFF_MULTICAST;
340 dev->priv_flags |= IFF_LIVE_ADDR_CHANGE |
341 IFF_NO_QUEUE;
342 dev->features |= NETIF_F_HIGHDMA |
343 NETIF_F_SG |
344 NETIF_F_FRAGLIST |
345 NETIF_F_HW_CSUM |
346 NETIF_F_TSO;
347 dev->hw_features |= NETIF_F_HW_TC;
348 dev->max_mtu = ETH_MAX_MTU;
349 dev->xdp_features = NETDEV_XDP_ACT_HW_OFFLOAD;
350}
351
352static int nsim_init_netdevsim(struct netdevsim *ns)
353{
354 struct mock_phc *phc;
355 int err;
356
357 phc = mock_phc_create(&ns->nsim_bus_dev->dev);
358 if (IS_ERR(phc))
359 return PTR_ERR(phc);
360
361 ns->phc = phc;
362 ns->netdev->netdev_ops = &nsim_netdev_ops;
363
364 err = nsim_udp_tunnels_info_create(ns->nsim_dev, ns->netdev);
365 if (err)
366 goto err_phc_destroy;
367
368 rtnl_lock();
369 err = nsim_bpf_init(ns);
370 if (err)
371 goto err_utn_destroy;
372
373 nsim_macsec_init(ns);
374 nsim_ipsec_init(ns);
375
376 err = register_netdevice(ns->netdev);
377 if (err)
378 goto err_ipsec_teardown;
379 rtnl_unlock();
380 return 0;
381
382err_ipsec_teardown:
383 nsim_ipsec_teardown(ns);
384 nsim_macsec_teardown(ns);
385 nsim_bpf_uninit(ns);
386err_utn_destroy:
387 rtnl_unlock();
388 nsim_udp_tunnels_info_destroy(ns->netdev);
389err_phc_destroy:
390 mock_phc_destroy(ns->phc);
391 return err;
392}
393
394static int nsim_init_netdevsim_vf(struct netdevsim *ns)
395{
396 int err;
397
398 ns->netdev->netdev_ops = &nsim_vf_netdev_ops;
399 rtnl_lock();
400 err = register_netdevice(ns->netdev);
401 rtnl_unlock();
402 return err;
403}
404
405static void nsim_exit_netdevsim(struct netdevsim *ns)
406{
407 nsim_udp_tunnels_info_destroy(ns->netdev);
408 mock_phc_destroy(ns->phc);
409}
410
411struct netdevsim *
412nsim_create(struct nsim_dev *nsim_dev, struct nsim_dev_port *nsim_dev_port)
413{
414 struct net_device *dev;
415 struct netdevsim *ns;
416 int err;
417
418 dev = alloc_netdev_mq(sizeof(*ns), "eth%d", NET_NAME_UNKNOWN, nsim_setup,
419 nsim_dev->nsim_bus_dev->num_queues);
420 if (!dev)
421 return ERR_PTR(-ENOMEM);
422
423 dev_net_set(dev, nsim_dev_net(nsim_dev));
424 ns = netdev_priv(dev);
425 ns->netdev = dev;
426 u64_stats_init(&ns->syncp);
427 ns->nsim_dev = nsim_dev;
428 ns->nsim_dev_port = nsim_dev_port;
429 ns->nsim_bus_dev = nsim_dev->nsim_bus_dev;
430 SET_NETDEV_DEV(dev, &ns->nsim_bus_dev->dev);
431 SET_NETDEV_DEVLINK_PORT(dev, &nsim_dev_port->devlink_port);
432 nsim_ethtool_init(ns);
433 if (nsim_dev_port_is_pf(nsim_dev_port))
434 err = nsim_init_netdevsim(ns);
435 else
436 err = nsim_init_netdevsim_vf(ns);
437 if (err)
438 goto err_free_netdev;
439 return ns;
440
441err_free_netdev:
442 free_netdev(dev);
443 return ERR_PTR(err);
444}
445
446void nsim_destroy(struct netdevsim *ns)
447{
448 struct net_device *dev = ns->netdev;
449 struct netdevsim *peer;
450
451 rtnl_lock();
452 peer = rtnl_dereference(ns->peer);
453 if (peer)
454 RCU_INIT_POINTER(peer->peer, NULL);
455 RCU_INIT_POINTER(ns->peer, NULL);
456 unregister_netdevice(dev);
457 if (nsim_dev_port_is_pf(ns->nsim_dev_port)) {
458 nsim_macsec_teardown(ns);
459 nsim_ipsec_teardown(ns);
460 nsim_bpf_uninit(ns);
461 }
462 rtnl_unlock();
463 if (nsim_dev_port_is_pf(ns->nsim_dev_port))
464 nsim_exit_netdevsim(ns);
465 free_netdev(dev);
466}
467
468bool netdev_is_nsim(struct net_device *dev)
469{
470 return dev->netdev_ops == &nsim_netdev_ops;
471}
472
473static int nsim_validate(struct nlattr *tb[], struct nlattr *data[],
474 struct netlink_ext_ack *extack)
475{
476 NL_SET_ERR_MSG_MOD(extack,
477 "Please use: echo \"[ID] [PORT_COUNT] [NUM_QUEUES]\" > /sys/bus/netdevsim/new_device");
478 return -EOPNOTSUPP;
479}
480
481static struct rtnl_link_ops nsim_link_ops __read_mostly = {
482 .kind = DRV_NAME,
483 .validate = nsim_validate,
484};
485
486static int __init nsim_module_init(void)
487{
488 int err;
489
490 err = nsim_dev_init();
491 if (err)
492 return err;
493
494 err = nsim_bus_init();
495 if (err)
496 goto err_dev_exit;
497
498 err = rtnl_link_register(&nsim_link_ops);
499 if (err)
500 goto err_bus_exit;
501
502 return 0;
503
504err_bus_exit:
505 nsim_bus_exit();
506err_dev_exit:
507 nsim_dev_exit();
508 return err;
509}
510
511static void __exit nsim_module_exit(void)
512{
513 rtnl_link_unregister(&nsim_link_ops);
514 nsim_bus_exit();
515 nsim_dev_exit();
516}
517
518module_init(nsim_module_init);
519module_exit(nsim_module_exit);
520MODULE_LICENSE("GPL");
521MODULE_DESCRIPTION("Simulated networking device for testing");
522MODULE_ALIAS_RTNL_LINK(DRV_NAME);