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