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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
26#include "netdevsim.h"
27
28struct nsim_vf_config {
29 int link_state;
30 u16 min_tx_rate;
31 u16 max_tx_rate;
32 u16 vlan;
33 __be16 vlan_proto;
34 u16 qos;
35 u8 vf_mac[ETH_ALEN];
36 bool spoofchk_enabled;
37 bool trusted;
38 bool rss_query_enabled;
39};
40
41static u32 nsim_dev_id;
42
43static int nsim_num_vf(struct device *dev)
44{
45 struct netdevsim *ns = to_nsim(dev);
46
47 return ns->num_vfs;
48}
49
50static struct bus_type nsim_bus = {
51 .name = DRV_NAME,
52 .dev_name = DRV_NAME,
53 .num_vf = nsim_num_vf,
54};
55
56static int nsim_vfs_enable(struct netdevsim *ns, unsigned int num_vfs)
57{
58 ns->vfconfigs = kcalloc(num_vfs, sizeof(struct nsim_vf_config),
59 GFP_KERNEL);
60 if (!ns->vfconfigs)
61 return -ENOMEM;
62 ns->num_vfs = num_vfs;
63
64 return 0;
65}
66
67static void nsim_vfs_disable(struct netdevsim *ns)
68{
69 kfree(ns->vfconfigs);
70 ns->vfconfigs = NULL;
71 ns->num_vfs = 0;
72}
73
74static ssize_t
75nsim_numvfs_store(struct device *dev, struct device_attribute *attr,
76 const char *buf, size_t count)
77{
78 struct netdevsim *ns = to_nsim(dev);
79 unsigned int num_vfs;
80 int ret;
81
82 ret = kstrtouint(buf, 0, &num_vfs);
83 if (ret)
84 return ret;
85
86 rtnl_lock();
87 if (ns->num_vfs == num_vfs)
88 goto exit_good;
89 if (ns->num_vfs && num_vfs) {
90 ret = -EBUSY;
91 goto exit_unlock;
92 }
93
94 if (num_vfs) {
95 ret = nsim_vfs_enable(ns, num_vfs);
96 if (ret)
97 goto exit_unlock;
98 } else {
99 nsim_vfs_disable(ns);
100 }
101exit_good:
102 ret = count;
103exit_unlock:
104 rtnl_unlock();
105
106 return ret;
107}
108
109static ssize_t
110nsim_numvfs_show(struct device *dev, struct device_attribute *attr, char *buf)
111{
112 struct netdevsim *ns = to_nsim(dev);
113
114 return sprintf(buf, "%u\n", ns->num_vfs);
115}
116
117static struct device_attribute nsim_numvfs_attr =
118 __ATTR(sriov_numvfs, 0664, nsim_numvfs_show, nsim_numvfs_store);
119
120static struct attribute *nsim_dev_attrs[] = {
121 &nsim_numvfs_attr.attr,
122 NULL,
123};
124
125static const struct attribute_group nsim_dev_attr_group = {
126 .attrs = nsim_dev_attrs,
127};
128
129static const struct attribute_group *nsim_dev_attr_groups[] = {
130 &nsim_dev_attr_group,
131 NULL,
132};
133
134static void nsim_dev_release(struct device *dev)
135{
136 struct netdevsim *ns = to_nsim(dev);
137
138 nsim_vfs_disable(ns);
139 free_netdev(ns->netdev);
140}
141
142static struct device_type nsim_dev_type = {
143 .groups = nsim_dev_attr_groups,
144 .release = nsim_dev_release,
145};
146
147static int nsim_init(struct net_device *dev)
148{
149 struct netdevsim *ns = netdev_priv(dev);
150 int err;
151
152 ns->netdev = dev;
153 ns->ddir = debugfs_create_dir(netdev_name(dev), nsim_ddir);
154 if (IS_ERR_OR_NULL(ns->ddir))
155 return -ENOMEM;
156
157 err = nsim_bpf_init(ns);
158 if (err)
159 goto err_debugfs_destroy;
160
161 ns->dev.id = nsim_dev_id++;
162 ns->dev.bus = &nsim_bus;
163 ns->dev.type = &nsim_dev_type;
164 err = device_register(&ns->dev);
165 if (err)
166 goto err_bpf_uninit;
167
168 SET_NETDEV_DEV(dev, &ns->dev);
169
170 err = nsim_devlink_setup(ns);
171 if (err)
172 goto err_unreg_dev;
173
174 return 0;
175
176err_unreg_dev:
177 device_unregister(&ns->dev);
178err_bpf_uninit:
179 nsim_bpf_uninit(ns);
180err_debugfs_destroy:
181 debugfs_remove_recursive(ns->ddir);
182 return err;
183}
184
185static void nsim_uninit(struct net_device *dev)
186{
187 struct netdevsim *ns = netdev_priv(dev);
188
189 nsim_devlink_teardown(ns);
190 debugfs_remove_recursive(ns->ddir);
191 nsim_bpf_uninit(ns);
192}
193
194static void nsim_free(struct net_device *dev)
195{
196 struct netdevsim *ns = netdev_priv(dev);
197
198 device_unregister(&ns->dev);
199 /* netdev and vf state will be freed out of device_release() */
200}
201
202static netdev_tx_t nsim_start_xmit(struct sk_buff *skb, struct net_device *dev)
203{
204 struct netdevsim *ns = netdev_priv(dev);
205
206 u64_stats_update_begin(&ns->syncp);
207 ns->tx_packets++;
208 ns->tx_bytes += skb->len;
209 u64_stats_update_end(&ns->syncp);
210
211 dev_kfree_skb(skb);
212
213 return NETDEV_TX_OK;
214}
215
216static void nsim_set_rx_mode(struct net_device *dev)
217{
218}
219
220static int nsim_change_mtu(struct net_device *dev, int new_mtu)
221{
222 struct netdevsim *ns = netdev_priv(dev);
223
224 if (ns->xdp_prog_mode == XDP_ATTACHED_DRV &&
225 new_mtu > NSIM_XDP_MAX_MTU)
226 return -EBUSY;
227
228 dev->mtu = new_mtu;
229
230 return 0;
231}
232
233static void
234nsim_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
235{
236 struct netdevsim *ns = netdev_priv(dev);
237 unsigned int start;
238
239 do {
240 start = u64_stats_fetch_begin(&ns->syncp);
241 stats->tx_bytes = ns->tx_bytes;
242 stats->tx_packets = ns->tx_packets;
243 } while (u64_stats_fetch_retry(&ns->syncp, start));
244}
245
246static int
247nsim_setup_tc_block_cb(enum tc_setup_type type, void *type_data, void *cb_priv)
248{
249 return nsim_bpf_setup_tc_block_cb(type, type_data, cb_priv);
250}
251
252static int
253nsim_setup_tc_block(struct net_device *dev, struct tc_block_offload *f)
254{
255 struct netdevsim *ns = netdev_priv(dev);
256
257 if (f->binder_type != TCF_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
258 return -EOPNOTSUPP;
259
260 switch (f->command) {
261 case TC_BLOCK_BIND:
262 return tcf_block_cb_register(f->block, nsim_setup_tc_block_cb,
263 ns, ns);
264 case TC_BLOCK_UNBIND:
265 tcf_block_cb_unregister(f->block, nsim_setup_tc_block_cb, ns);
266 return 0;
267 default:
268 return -EOPNOTSUPP;
269 }
270}
271
272static int nsim_set_vf_mac(struct net_device *dev, int vf, u8 *mac)
273{
274 struct netdevsim *ns = netdev_priv(dev);
275
276 /* Only refuse multicast addresses, zero address can mean unset/any. */
277 if (vf >= ns->num_vfs || is_multicast_ether_addr(mac))
278 return -EINVAL;
279 memcpy(ns->vfconfigs[vf].vf_mac, mac, ETH_ALEN);
280
281 return 0;
282}
283
284static int nsim_set_vf_vlan(struct net_device *dev, int vf,
285 u16 vlan, u8 qos, __be16 vlan_proto)
286{
287 struct netdevsim *ns = netdev_priv(dev);
288
289 if (vf >= ns->num_vfs || vlan > 4095 || qos > 7)
290 return -EINVAL;
291
292 ns->vfconfigs[vf].vlan = vlan;
293 ns->vfconfigs[vf].qos = qos;
294 ns->vfconfigs[vf].vlan_proto = vlan_proto;
295
296 return 0;
297}
298
299static int nsim_set_vf_rate(struct net_device *dev, int vf, int min, int max)
300{
301 struct netdevsim *ns = netdev_priv(dev);
302
303 if (vf >= ns->num_vfs)
304 return -EINVAL;
305
306 ns->vfconfigs[vf].min_tx_rate = min;
307 ns->vfconfigs[vf].max_tx_rate = max;
308
309 return 0;
310}
311
312static int nsim_set_vf_spoofchk(struct net_device *dev, int vf, bool val)
313{
314 struct netdevsim *ns = netdev_priv(dev);
315
316 if (vf >= ns->num_vfs)
317 return -EINVAL;
318 ns->vfconfigs[vf].spoofchk_enabled = val;
319
320 return 0;
321}
322
323static int nsim_set_vf_rss_query_en(struct net_device *dev, int vf, bool val)
324{
325 struct netdevsim *ns = netdev_priv(dev);
326
327 if (vf >= ns->num_vfs)
328 return -EINVAL;
329 ns->vfconfigs[vf].rss_query_enabled = val;
330
331 return 0;
332}
333
334static int nsim_set_vf_trust(struct net_device *dev, int vf, bool val)
335{
336 struct netdevsim *ns = netdev_priv(dev);
337
338 if (vf >= ns->num_vfs)
339 return -EINVAL;
340 ns->vfconfigs[vf].trusted = val;
341
342 return 0;
343}
344
345static int
346nsim_get_vf_config(struct net_device *dev, int vf, struct ifla_vf_info *ivi)
347{
348 struct netdevsim *ns = netdev_priv(dev);
349
350 if (vf >= ns->num_vfs)
351 return -EINVAL;
352
353 ivi->vf = vf;
354 ivi->linkstate = ns->vfconfigs[vf].link_state;
355 ivi->min_tx_rate = ns->vfconfigs[vf].min_tx_rate;
356 ivi->max_tx_rate = ns->vfconfigs[vf].max_tx_rate;
357 ivi->vlan = ns->vfconfigs[vf].vlan;
358 ivi->vlan_proto = ns->vfconfigs[vf].vlan_proto;
359 ivi->qos = ns->vfconfigs[vf].qos;
360 memcpy(&ivi->mac, ns->vfconfigs[vf].vf_mac, ETH_ALEN);
361 ivi->spoofchk = ns->vfconfigs[vf].spoofchk_enabled;
362 ivi->trusted = ns->vfconfigs[vf].trusted;
363 ivi->rss_query_en = ns->vfconfigs[vf].rss_query_enabled;
364
365 return 0;
366}
367
368static int nsim_set_vf_link_state(struct net_device *dev, int vf, int state)
369{
370 struct netdevsim *ns = netdev_priv(dev);
371
372 if (vf >= ns->num_vfs)
373 return -EINVAL;
374
375 switch (state) {
376 case IFLA_VF_LINK_STATE_AUTO:
377 case IFLA_VF_LINK_STATE_ENABLE:
378 case IFLA_VF_LINK_STATE_DISABLE:
379 break;
380 default:
381 return -EINVAL;
382 }
383
384 ns->vfconfigs[vf].link_state = state;
385
386 return 0;
387}
388
389static int
390nsim_setup_tc(struct net_device *dev, enum tc_setup_type type, void *type_data)
391{
392 switch (type) {
393 case TC_SETUP_BLOCK:
394 return nsim_setup_tc_block(dev, type_data);
395 default:
396 return -EOPNOTSUPP;
397 }
398}
399
400static int
401nsim_set_features(struct net_device *dev, netdev_features_t features)
402{
403 struct netdevsim *ns = netdev_priv(dev);
404
405 if ((dev->features & NETIF_F_HW_TC) > (features & NETIF_F_HW_TC))
406 return nsim_bpf_disable_tc(ns);
407
408 return 0;
409}
410
411static const struct net_device_ops nsim_netdev_ops = {
412 .ndo_init = nsim_init,
413 .ndo_uninit = nsim_uninit,
414 .ndo_start_xmit = nsim_start_xmit,
415 .ndo_set_rx_mode = nsim_set_rx_mode,
416 .ndo_set_mac_address = eth_mac_addr,
417 .ndo_validate_addr = eth_validate_addr,
418 .ndo_change_mtu = nsim_change_mtu,
419 .ndo_get_stats64 = nsim_get_stats64,
420 .ndo_set_vf_mac = nsim_set_vf_mac,
421 .ndo_set_vf_vlan = nsim_set_vf_vlan,
422 .ndo_set_vf_rate = nsim_set_vf_rate,
423 .ndo_set_vf_spoofchk = nsim_set_vf_spoofchk,
424 .ndo_set_vf_trust = nsim_set_vf_trust,
425 .ndo_get_vf_config = nsim_get_vf_config,
426 .ndo_set_vf_link_state = nsim_set_vf_link_state,
427 .ndo_set_vf_rss_query_en = nsim_set_vf_rss_query_en,
428 .ndo_setup_tc = nsim_setup_tc,
429 .ndo_set_features = nsim_set_features,
430 .ndo_bpf = nsim_bpf,
431};
432
433static void nsim_setup(struct net_device *dev)
434{
435 ether_setup(dev);
436 eth_hw_addr_random(dev);
437
438 dev->netdev_ops = &nsim_netdev_ops;
439 dev->priv_destructor = nsim_free;
440
441 dev->tx_queue_len = 0;
442 dev->flags |= IFF_NOARP;
443 dev->flags &= ~IFF_MULTICAST;
444 dev->priv_flags |= IFF_LIVE_ADDR_CHANGE |
445 IFF_NO_QUEUE;
446 dev->features |= NETIF_F_HIGHDMA |
447 NETIF_F_SG |
448 NETIF_F_FRAGLIST |
449 NETIF_F_HW_CSUM |
450 NETIF_F_TSO;
451 dev->hw_features |= NETIF_F_HW_TC;
452 dev->max_mtu = ETH_MAX_MTU;
453}
454
455static int nsim_validate(struct nlattr *tb[], struct nlattr *data[],
456 struct netlink_ext_ack *extack)
457{
458 if (tb[IFLA_ADDRESS]) {
459 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
460 return -EINVAL;
461 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
462 return -EADDRNOTAVAIL;
463 }
464 return 0;
465}
466
467static struct rtnl_link_ops nsim_link_ops __read_mostly = {
468 .kind = DRV_NAME,
469 .priv_size = sizeof(struct netdevsim),
470 .setup = nsim_setup,
471 .validate = nsim_validate,
472};
473
474struct dentry *nsim_ddir;
475
476static int __init nsim_module_init(void)
477{
478 int err;
479
480 nsim_ddir = debugfs_create_dir(DRV_NAME, NULL);
481 if (IS_ERR_OR_NULL(nsim_ddir))
482 return -ENOMEM;
483
484 err = bus_register(&nsim_bus);
485 if (err)
486 goto err_debugfs_destroy;
487
488 err = nsim_devlink_init();
489 if (err)
490 goto err_unreg_bus;
491
492 err = rtnl_link_register(&nsim_link_ops);
493 if (err)
494 goto err_dl_fini;
495
496 return 0;
497
498err_dl_fini:
499 nsim_devlink_exit();
500err_unreg_bus:
501 bus_unregister(&nsim_bus);
502err_debugfs_destroy:
503 debugfs_remove_recursive(nsim_ddir);
504 return err;
505}
506
507static void __exit nsim_module_exit(void)
508{
509 rtnl_link_unregister(&nsim_link_ops);
510 nsim_devlink_exit();
511 bus_unregister(&nsim_bus);
512 debugfs_remove_recursive(nsim_ddir);
513}
514
515module_init(nsim_module_init);
516module_exit(nsim_module_exit);
517MODULE_LICENSE("GPL");
518MODULE_ALIAS_RTNL_LINK(DRV_NAME);