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/device.h>
18 #include <linux/ethtool.h>
19 #include <linux/kernel.h>
20 #include <linux/list.h>
21 #include <linux/netdevice.h>
22 #include <linux/ptp_mock.h>
23 #include <linux/u64_stats_sync.h>
24 #include <net/devlink.h>
25 #include <net/udp_tunnel.h>
26 #include <net/xdp.h>
27 #include <net/macsec.h>
28
29 #define DRV_NAME "netdevsim"
30
31 #define NSIM_XDP_MAX_MTU 4000
32
33 #define NSIM_EA(extack, msg) NL_SET_ERR_MSG_MOD((extack), msg)
34
35 #define NSIM_IPSEC_MAX_SA_COUNT 33
36 #define NSIM_IPSEC_VALID BIT(31)
37 #define NSIM_UDP_TUNNEL_N_PORTS 4
38
39 struct nsim_sa {
40 struct xfrm_state *xs;
41 __be32 ipaddr[4];
42 u32 key[4];
43 u32 salt;
44 bool used;
45 bool crypt;
46 bool rx;
47 };
48
49 struct nsim_ipsec {
50 struct nsim_sa sa[NSIM_IPSEC_MAX_SA_COUNT];
51 struct dentry *pfile;
52 u32 count;
53 u32 tx;
54 u32 ok;
55 };
56
57 #define NSIM_MACSEC_MAX_SECY_COUNT 3
58 #define NSIM_MACSEC_MAX_RXSC_COUNT 1
59 struct nsim_rxsc {
60 sci_t sci;
61 bool used;
62 };
63
64 struct nsim_secy {
65 sci_t sci;
66 struct nsim_rxsc nsim_rxsc[NSIM_MACSEC_MAX_RXSC_COUNT];
67 u8 nsim_rxsc_count;
68 bool used;
69 };
70
71 struct nsim_macsec {
72 struct nsim_secy nsim_secy[NSIM_MACSEC_MAX_SECY_COUNT];
73 u8 nsim_secy_count;
74 };
75
76 struct nsim_ethtool_pauseparam {
77 bool rx;
78 bool tx;
79 bool report_stats_rx;
80 bool report_stats_tx;
81 };
82
83 struct nsim_ethtool {
84 u32 get_err;
85 u32 set_err;
86 u32 channels;
87 struct nsim_ethtool_pauseparam pauseparam;
88 struct ethtool_coalesce coalesce;
89 struct ethtool_ringparam ring;
90 struct ethtool_fecparam fec;
91 };
92
93 struct netdevsim {
94 struct net_device *netdev;
95 struct nsim_dev *nsim_dev;
96 struct nsim_dev_port *nsim_dev_port;
97 struct mock_phc *phc;
98
99 u64 tx_packets;
100 u64 tx_bytes;
101 struct u64_stats_sync syncp;
102
103 struct nsim_bus_dev *nsim_bus_dev;
104
105 struct bpf_prog *bpf_offloaded;
106 u32 bpf_offloaded_id;
107
108 struct xdp_attachment_info xdp;
109 struct xdp_attachment_info xdp_hw;
110
111 bool bpf_tc_accept;
112 bool bpf_tc_non_bound_accept;
113 bool bpf_xdpdrv_accept;
114 bool bpf_xdpoffload_accept;
115
116 bool bpf_map_accept;
117 struct nsim_ipsec ipsec;
118 struct nsim_macsec macsec;
119 struct {
120 u32 inject_error;
121 u32 sleep;
122 u32 __ports[2][NSIM_UDP_TUNNEL_N_PORTS];
123 u32 (*ports)[NSIM_UDP_TUNNEL_N_PORTS];
124 struct dentry *ddir;
125 struct debugfs_u32_array dfs_ports[2];
126 } udp_ports;
127
128 struct nsim_ethtool ethtool;
129 };
130
131 struct netdevsim *
132 nsim_create(struct nsim_dev *nsim_dev, struct nsim_dev_port *nsim_dev_port);
133 void nsim_destroy(struct netdevsim *ns);
134
135 void nsim_ethtool_init(struct netdevsim *ns);
136
137 void nsim_udp_tunnels_debugfs_create(struct nsim_dev *nsim_dev);
138 int nsim_udp_tunnels_info_create(struct nsim_dev *nsim_dev,
139 struct net_device *dev);
140 void nsim_udp_tunnels_info_destroy(struct net_device *dev);
141
142 #ifdef CONFIG_BPF_SYSCALL
143 int nsim_bpf_dev_init(struct nsim_dev *nsim_dev);
144 void nsim_bpf_dev_exit(struct nsim_dev *nsim_dev);
145 int nsim_bpf_init(struct netdevsim *ns);
146 void nsim_bpf_uninit(struct netdevsim *ns);
147 int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf);
148 int nsim_bpf_disable_tc(struct netdevsim *ns);
149 int nsim_bpf_setup_tc_block_cb(enum tc_setup_type type,
150 void *type_data, void *cb_priv);
151 #else
152
nsim_bpf_dev_init(struct nsim_dev * nsim_dev)153 static inline int nsim_bpf_dev_init(struct nsim_dev *nsim_dev)
154 {
155 return 0;
156 }
157
nsim_bpf_dev_exit(struct nsim_dev * nsim_dev)158 static inline void nsim_bpf_dev_exit(struct nsim_dev *nsim_dev)
159 {
160 }
nsim_bpf_init(struct netdevsim * ns)161 static inline int nsim_bpf_init(struct netdevsim *ns)
162 {
163 return 0;
164 }
165
nsim_bpf_uninit(struct netdevsim * ns)166 static inline void nsim_bpf_uninit(struct netdevsim *ns)
167 {
168 }
169
nsim_bpf(struct net_device * dev,struct netdev_bpf * bpf)170 static inline int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf)
171 {
172 return -EOPNOTSUPP;
173 }
174
nsim_bpf_disable_tc(struct netdevsim * ns)175 static inline int nsim_bpf_disable_tc(struct netdevsim *ns)
176 {
177 return 0;
178 }
179
180 static inline int
nsim_bpf_setup_tc_block_cb(enum tc_setup_type type,void * type_data,void * cb_priv)181 nsim_bpf_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
182 void *cb_priv)
183 {
184 return -EOPNOTSUPP;
185 }
186 #endif
187
188 enum nsim_resource_id {
189 NSIM_RESOURCE_NONE, /* DEVLINK_RESOURCE_ID_PARENT_TOP */
190 NSIM_RESOURCE_IPV4,
191 NSIM_RESOURCE_IPV4_FIB,
192 NSIM_RESOURCE_IPV4_FIB_RULES,
193 NSIM_RESOURCE_IPV6,
194 NSIM_RESOURCE_IPV6_FIB,
195 NSIM_RESOURCE_IPV6_FIB_RULES,
196 NSIM_RESOURCE_NEXTHOPS,
197 };
198
199 struct nsim_dev_health {
200 struct devlink_health_reporter *empty_reporter;
201 struct devlink_health_reporter *dummy_reporter;
202 struct dentry *ddir;
203 char *recovered_break_msg;
204 u32 binary_len;
205 bool fail_recover;
206 };
207
208 int nsim_dev_health_init(struct nsim_dev *nsim_dev, struct devlink *devlink);
209 void nsim_dev_health_exit(struct nsim_dev *nsim_dev);
210
211 struct nsim_dev_hwstats_netdev {
212 struct list_head list;
213 struct net_device *netdev;
214 struct rtnl_hw_stats64 stats;
215 bool enabled;
216 bool fail_enable;
217 };
218
219 struct nsim_dev_hwstats {
220 struct dentry *ddir;
221 struct dentry *l3_ddir;
222
223 struct mutex hwsdev_list_lock; /* protects hwsdev list(s) */
224 struct list_head l3_list;
225
226 struct notifier_block netdevice_nb;
227 struct delayed_work traffic_dw;
228 };
229
230 int nsim_dev_hwstats_init(struct nsim_dev *nsim_dev);
231 void nsim_dev_hwstats_exit(struct nsim_dev *nsim_dev);
232
233 #if IS_ENABLED(CONFIG_PSAMPLE)
234 int nsim_dev_psample_init(struct nsim_dev *nsim_dev);
235 void nsim_dev_psample_exit(struct nsim_dev *nsim_dev);
236 #else
nsim_dev_psample_init(struct nsim_dev * nsim_dev)237 static inline int nsim_dev_psample_init(struct nsim_dev *nsim_dev)
238 {
239 return 0;
240 }
241
nsim_dev_psample_exit(struct nsim_dev * nsim_dev)242 static inline void nsim_dev_psample_exit(struct nsim_dev *nsim_dev)
243 {
244 }
245 #endif
246
247 enum nsim_dev_port_type {
248 NSIM_DEV_PORT_TYPE_PF,
249 NSIM_DEV_PORT_TYPE_VF,
250 };
251
252 #define NSIM_DEV_VF_PORT_INDEX_BASE 128
253 #define NSIM_DEV_VF_PORT_INDEX_MAX UINT_MAX
254
255 struct nsim_dev_port {
256 struct list_head list;
257 struct devlink_port devlink_port;
258 unsigned int port_index;
259 enum nsim_dev_port_type port_type;
260 struct dentry *ddir;
261 struct dentry *rate_parent;
262 char *parent_name;
263 struct netdevsim *ns;
264 };
265
266 struct nsim_vf_config {
267 int link_state;
268 u16 min_tx_rate;
269 u16 max_tx_rate;
270 u16 vlan;
271 __be16 vlan_proto;
272 u16 qos;
273 u8 vf_mac[ETH_ALEN];
274 bool spoofchk_enabled;
275 bool trusted;
276 bool rss_query_enabled;
277 };
278
279 struct nsim_dev {
280 struct nsim_bus_dev *nsim_bus_dev;
281 struct nsim_fib_data *fib_data;
282 struct nsim_trap_data *trap_data;
283 struct dentry *ddir;
284 struct dentry *ports_ddir;
285 struct dentry *take_snapshot;
286 struct dentry *nodes_ddir;
287
288 struct nsim_vf_config *vfconfigs;
289
290 struct bpf_offload_dev *bpf_dev;
291 bool bpf_bind_accept;
292 bool bpf_bind_verifier_accept;
293 u32 bpf_bind_verifier_delay;
294 struct dentry *ddir_bpf_bound_progs;
295 u32 prog_id_gen;
296 struct list_head bpf_bound_progs;
297 struct list_head bpf_bound_maps;
298 struct netdev_phys_item_id switch_id;
299 struct list_head port_list;
300 bool fw_update_status;
301 u32 fw_update_overwrite_mask;
302 u32 max_macs;
303 bool test1;
304 bool dont_allow_reload;
305 bool fail_reload;
306 struct devlink_region *dummy_region;
307 struct nsim_dev_health health;
308 struct nsim_dev_hwstats hwstats;
309 struct flow_action_cookie *fa_cookie;
310 spinlock_t fa_cookie_lock; /* protects fa_cookie */
311 bool fail_trap_group_set;
312 bool fail_trap_policer_set;
313 bool fail_trap_policer_counter_get;
314 bool fail_trap_drop_counter_get;
315 struct {
316 struct udp_tunnel_nic_shared utn_shared;
317 u32 __ports[2][NSIM_UDP_TUNNEL_N_PORTS];
318 bool sync_all;
319 bool open_only;
320 bool ipv4_only;
321 bool shared;
322 bool static_iana_vxlan;
323 u32 sleep;
324 } udp_ports;
325 struct nsim_dev_psample *psample;
326 u16 esw_mode;
327 };
328
nsim_esw_mode_is_legacy(struct nsim_dev * nsim_dev)329 static inline bool nsim_esw_mode_is_legacy(struct nsim_dev *nsim_dev)
330 {
331 return nsim_dev->esw_mode == DEVLINK_ESWITCH_MODE_LEGACY;
332 }
333
nsim_esw_mode_is_switchdev(struct nsim_dev * nsim_dev)334 static inline bool nsim_esw_mode_is_switchdev(struct nsim_dev *nsim_dev)
335 {
336 return nsim_dev->esw_mode == DEVLINK_ESWITCH_MODE_SWITCHDEV;
337 }
338
nsim_dev_net(struct nsim_dev * nsim_dev)339 static inline struct net *nsim_dev_net(struct nsim_dev *nsim_dev)
340 {
341 return devlink_net(priv_to_devlink(nsim_dev));
342 }
343
344 int nsim_dev_init(void);
345 void nsim_dev_exit(void);
346 int nsim_drv_probe(struct nsim_bus_dev *nsim_bus_dev);
347 void nsim_drv_remove(struct nsim_bus_dev *nsim_bus_dev);
348 int nsim_drv_port_add(struct nsim_bus_dev *nsim_bus_dev,
349 enum nsim_dev_port_type type,
350 unsigned int port_index);
351 int nsim_drv_port_del(struct nsim_bus_dev *nsim_bus_dev,
352 enum nsim_dev_port_type type,
353 unsigned int port_index);
354 int nsim_drv_configure_vfs(struct nsim_bus_dev *nsim_bus_dev,
355 unsigned int num_vfs);
356
357 unsigned int nsim_dev_get_vfs(struct nsim_dev *nsim_dev);
358
359 struct nsim_fib_data *nsim_fib_create(struct devlink *devlink,
360 struct netlink_ext_ack *extack);
361 void nsim_fib_destroy(struct devlink *devlink, struct nsim_fib_data *fib_data);
362 u64 nsim_fib_get_val(struct nsim_fib_data *fib_data,
363 enum nsim_resource_id res_id, bool max);
364
nsim_dev_port_is_pf(struct nsim_dev_port * nsim_dev_port)365 static inline bool nsim_dev_port_is_pf(struct nsim_dev_port *nsim_dev_port)
366 {
367 return nsim_dev_port->port_type == NSIM_DEV_PORT_TYPE_PF;
368 }
369
nsim_dev_port_is_vf(struct nsim_dev_port * nsim_dev_port)370 static inline bool nsim_dev_port_is_vf(struct nsim_dev_port *nsim_dev_port)
371 {
372 return nsim_dev_port->port_type == NSIM_DEV_PORT_TYPE_VF;
373 }
374 #if IS_ENABLED(CONFIG_XFRM_OFFLOAD)
375 void nsim_ipsec_init(struct netdevsim *ns);
376 void nsim_ipsec_teardown(struct netdevsim *ns);
377 bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb);
378 #else
nsim_ipsec_init(struct netdevsim * ns)379 static inline void nsim_ipsec_init(struct netdevsim *ns)
380 {
381 }
382
nsim_ipsec_teardown(struct netdevsim * ns)383 static inline void nsim_ipsec_teardown(struct netdevsim *ns)
384 {
385 }
386
nsim_ipsec_tx(struct netdevsim * ns,struct sk_buff * skb)387 static inline bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb)
388 {
389 return true;
390 }
391 #endif
392
393 #if IS_ENABLED(CONFIG_MACSEC)
394 void nsim_macsec_init(struct netdevsim *ns);
395 void nsim_macsec_teardown(struct netdevsim *ns);
396 #else
nsim_macsec_init(struct netdevsim * ns)397 static inline void nsim_macsec_init(struct netdevsim *ns)
398 {
399 }
400
nsim_macsec_teardown(struct netdevsim * ns)401 static inline void nsim_macsec_teardown(struct netdevsim *ns)
402 {
403 }
404 #endif
405
406 struct nsim_bus_dev {
407 struct device dev;
408 struct list_head list;
409 unsigned int port_count;
410 unsigned int num_queues; /* Number of queues for each port on this bus */
411 struct net *initial_net; /* Purpose of this is to carry net pointer
412 * during the probe time only.
413 */
414 unsigned int max_vfs;
415 unsigned int num_vfs;
416 bool init;
417 };
418
419 int nsim_bus_init(void);
420 void nsim_bus_exit(void);
421