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
nsim_start_xmit(struct sk_buff * skb,struct net_device * dev)29 static 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
41 out:
42 dev_kfree_skb(skb);
43
44 return NETDEV_TX_OK;
45 }
46
nsim_set_rx_mode(struct net_device * dev)47 static void nsim_set_rx_mode(struct net_device *dev)
48 {
49 }
50
nsim_change_mtu(struct net_device * dev,int new_mtu)51 static 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
63 static void
nsim_get_stats64(struct net_device * dev,struct rtnl_link_stats64 * stats)64 nsim_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_irq(&ns->syncp);
71 stats->tx_bytes = ns->tx_bytes;
72 stats->tx_packets = ns->tx_packets;
73 } while (u64_stats_fetch_retry_irq(&ns->syncp, start));
74 }
75
76 static int
nsim_setup_tc_block_cb(enum tc_setup_type type,void * type_data,void * cb_priv)77 nsim_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
nsim_set_vf_mac(struct net_device * dev,int vf,u8 * mac)82 static 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
nsim_set_vf_vlan(struct net_device * dev,int vf,u16 vlan,u8 qos,__be16 vlan_proto)95 static 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
nsim_set_vf_rate(struct net_device * dev,int vf,int min,int max)111 static 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
nsim_set_vf_spoofchk(struct net_device * dev,int vf,bool val)130 static 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
nsim_set_vf_rss_query_en(struct net_device * dev,int vf,bool val)142 static 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
nsim_set_vf_trust(struct net_device * dev,int vf,bool val)154 static 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
166 static int
nsim_get_vf_config(struct net_device * dev,int vf,struct ifla_vf_info * ivi)167 nsim_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
nsim_set_vf_link_state(struct net_device * dev,int vf,int state)190 static 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
212 static LIST_HEAD(nsim_block_cb_list);
213
214 static int
nsim_setup_tc(struct net_device * dev,enum tc_setup_type type,void * type_data)215 nsim_setup_tc(struct net_device *dev, enum tc_setup_type type, void *type_data)
216 {
217 struct netdevsim *ns = netdev_priv(dev);
218
219 switch (type) {
220 case TC_SETUP_BLOCK:
221 return flow_block_cb_setup_simple(type_data,
222 &nsim_block_cb_list,
223 nsim_setup_tc_block_cb,
224 ns, ns, true);
225 default:
226 return -EOPNOTSUPP;
227 }
228 }
229
230 static int
nsim_set_features(struct net_device * dev,netdev_features_t features)231 nsim_set_features(struct net_device *dev, netdev_features_t features)
232 {
233 struct netdevsim *ns = netdev_priv(dev);
234
235 if ((dev->features & NETIF_F_HW_TC) > (features & NETIF_F_HW_TC))
236 return nsim_bpf_disable_tc(ns);
237
238 return 0;
239 }
240
nsim_get_devlink_port(struct net_device * dev)241 static struct devlink_port *nsim_get_devlink_port(struct net_device *dev)
242 {
243 struct netdevsim *ns = netdev_priv(dev);
244
245 return &ns->nsim_dev_port->devlink_port;
246 }
247
248 static const struct net_device_ops nsim_netdev_ops = {
249 .ndo_start_xmit = nsim_start_xmit,
250 .ndo_set_rx_mode = nsim_set_rx_mode,
251 .ndo_set_mac_address = eth_mac_addr,
252 .ndo_validate_addr = eth_validate_addr,
253 .ndo_change_mtu = nsim_change_mtu,
254 .ndo_get_stats64 = nsim_get_stats64,
255 .ndo_set_vf_mac = nsim_set_vf_mac,
256 .ndo_set_vf_vlan = nsim_set_vf_vlan,
257 .ndo_set_vf_rate = nsim_set_vf_rate,
258 .ndo_set_vf_spoofchk = nsim_set_vf_spoofchk,
259 .ndo_set_vf_trust = nsim_set_vf_trust,
260 .ndo_get_vf_config = nsim_get_vf_config,
261 .ndo_set_vf_link_state = nsim_set_vf_link_state,
262 .ndo_set_vf_rss_query_en = nsim_set_vf_rss_query_en,
263 .ndo_setup_tc = nsim_setup_tc,
264 .ndo_set_features = nsim_set_features,
265 .ndo_bpf = nsim_bpf,
266 .ndo_get_devlink_port = nsim_get_devlink_port,
267 };
268
269 static const struct net_device_ops nsim_vf_netdev_ops = {
270 .ndo_start_xmit = nsim_start_xmit,
271 .ndo_set_rx_mode = nsim_set_rx_mode,
272 .ndo_set_mac_address = eth_mac_addr,
273 .ndo_validate_addr = eth_validate_addr,
274 .ndo_change_mtu = nsim_change_mtu,
275 .ndo_get_stats64 = nsim_get_stats64,
276 .ndo_setup_tc = nsim_setup_tc,
277 .ndo_set_features = nsim_set_features,
278 .ndo_get_devlink_port = nsim_get_devlink_port,
279 };
280
nsim_setup(struct net_device * dev)281 static void nsim_setup(struct net_device *dev)
282 {
283 ether_setup(dev);
284 eth_hw_addr_random(dev);
285
286 dev->tx_queue_len = 0;
287 dev->flags |= IFF_NOARP;
288 dev->flags &= ~IFF_MULTICAST;
289 dev->priv_flags |= IFF_LIVE_ADDR_CHANGE |
290 IFF_NO_QUEUE;
291 dev->features |= NETIF_F_HIGHDMA |
292 NETIF_F_SG |
293 NETIF_F_FRAGLIST |
294 NETIF_F_HW_CSUM |
295 NETIF_F_TSO;
296 dev->hw_features |= NETIF_F_HW_TC;
297 dev->max_mtu = ETH_MAX_MTU;
298 }
299
nsim_init_netdevsim(struct netdevsim * ns)300 static int nsim_init_netdevsim(struct netdevsim *ns)
301 {
302 int err;
303
304 ns->netdev->netdev_ops = &nsim_netdev_ops;
305
306 err = nsim_udp_tunnels_info_create(ns->nsim_dev, ns->netdev);
307 if (err)
308 return err;
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(ns->netdev);
318 if (err)
319 goto err_ipsec_teardown;
320 rtnl_unlock();
321 return 0;
322
323 err_ipsec_teardown:
324 nsim_ipsec_teardown(ns);
325 nsim_bpf_uninit(ns);
326 err_utn_destroy:
327 rtnl_unlock();
328 nsim_udp_tunnels_info_destroy(ns->netdev);
329 return err;
330 }
331
nsim_init_netdevsim_vf(struct netdevsim * ns)332 static int nsim_init_netdevsim_vf(struct netdevsim *ns)
333 {
334 int err;
335
336 ns->netdev->netdev_ops = &nsim_vf_netdev_ops;
337 rtnl_lock();
338 err = register_netdevice(ns->netdev);
339 rtnl_unlock();
340 return err;
341 }
342
343 struct netdevsim *
nsim_create(struct nsim_dev * nsim_dev,struct nsim_dev_port * nsim_dev_port)344 nsim_create(struct nsim_dev *nsim_dev, struct nsim_dev_port *nsim_dev_port)
345 {
346 struct net_device *dev;
347 struct netdevsim *ns;
348 int err;
349
350 dev = alloc_netdev_mq(sizeof(*ns), "eth%d", NET_NAME_UNKNOWN, nsim_setup,
351 nsim_dev->nsim_bus_dev->num_queues);
352 if (!dev)
353 return ERR_PTR(-ENOMEM);
354
355 dev_net_set(dev, nsim_dev_net(nsim_dev));
356 ns = netdev_priv(dev);
357 ns->netdev = dev;
358 u64_stats_init(&ns->syncp);
359 ns->nsim_dev = nsim_dev;
360 ns->nsim_dev_port = nsim_dev_port;
361 ns->nsim_bus_dev = nsim_dev->nsim_bus_dev;
362 SET_NETDEV_DEV(dev, &ns->nsim_bus_dev->dev);
363 nsim_ethtool_init(ns);
364 if (nsim_dev_port_is_pf(nsim_dev_port))
365 err = nsim_init_netdevsim(ns);
366 else
367 err = nsim_init_netdevsim_vf(ns);
368 if (err)
369 goto err_free_netdev;
370 return ns;
371
372 err_free_netdev:
373 free_netdev(dev);
374 return ERR_PTR(err);
375 }
376
nsim_destroy(struct netdevsim * ns)377 void nsim_destroy(struct netdevsim *ns)
378 {
379 struct net_device *dev = ns->netdev;
380
381 rtnl_lock();
382 unregister_netdevice(dev);
383 if (nsim_dev_port_is_pf(ns->nsim_dev_port)) {
384 nsim_ipsec_teardown(ns);
385 nsim_bpf_uninit(ns);
386 }
387 rtnl_unlock();
388 if (nsim_dev_port_is_pf(ns->nsim_dev_port))
389 nsim_udp_tunnels_info_destroy(dev);
390 free_netdev(dev);
391 }
392
nsim_validate(struct nlattr * tb[],struct nlattr * data[],struct netlink_ext_ack * extack)393 static int nsim_validate(struct nlattr *tb[], struct nlattr *data[],
394 struct netlink_ext_ack *extack)
395 {
396 NL_SET_ERR_MSG_MOD(extack,
397 "Please use: echo \"[ID] [PORT_COUNT] [NUM_QUEUES]\" > /sys/bus/netdevsim/new_device");
398 return -EOPNOTSUPP;
399 }
400
401 static struct rtnl_link_ops nsim_link_ops __read_mostly = {
402 .kind = DRV_NAME,
403 .validate = nsim_validate,
404 };
405
nsim_module_init(void)406 static int __init nsim_module_init(void)
407 {
408 int err;
409
410 err = nsim_dev_init();
411 if (err)
412 return err;
413
414 err = nsim_bus_init();
415 if (err)
416 goto err_dev_exit;
417
418 err = rtnl_link_register(&nsim_link_ops);
419 if (err)
420 goto err_bus_exit;
421
422 return 0;
423
424 err_bus_exit:
425 nsim_bus_exit();
426 err_dev_exit:
427 nsim_dev_exit();
428 return err;
429 }
430
nsim_module_exit(void)431 static void __exit nsim_module_exit(void)
432 {
433 rtnl_link_unregister(&nsim_link_ops);
434 nsim_bus_exit();
435 nsim_dev_exit();
436 }
437
438 module_init(nsim_module_init);
439 module_exit(nsim_module_exit);
440 MODULE_LICENSE("GPL");
441 MODULE_ALIAS_RTNL_LINK(DRV_NAME);
442