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 debugfs_u32_array dfs_ports[2];
125 } udp_ports;
126
127 struct nsim_ethtool ethtool;
128 };
129
130 struct netdevsim *
131 nsim_create(struct nsim_dev *nsim_dev, struct nsim_dev_port *nsim_dev_port);
132 void nsim_destroy(struct netdevsim *ns);
133
134 void nsim_ethtool_init(struct netdevsim *ns);
135
136 void nsim_udp_tunnels_debugfs_create(struct nsim_dev *nsim_dev);
137 int nsim_udp_tunnels_info_create(struct nsim_dev *nsim_dev,
138 struct net_device *dev);
139 void nsim_udp_tunnels_info_destroy(struct net_device *dev);
140
141 #ifdef CONFIG_BPF_SYSCALL
142 int nsim_bpf_dev_init(struct nsim_dev *nsim_dev);
143 void nsim_bpf_dev_exit(struct nsim_dev *nsim_dev);
144 int nsim_bpf_init(struct netdevsim *ns);
145 void nsim_bpf_uninit(struct netdevsim *ns);
146 int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf);
147 int nsim_bpf_disable_tc(struct netdevsim *ns);
148 int nsim_bpf_setup_tc_block_cb(enum tc_setup_type type,
149 void *type_data, void *cb_priv);
150 #else
151
nsim_bpf_dev_init(struct nsim_dev * nsim_dev)152 static inline int nsim_bpf_dev_init(struct nsim_dev *nsim_dev)
153 {
154 return 0;
155 }
156
nsim_bpf_dev_exit(struct nsim_dev * nsim_dev)157 static inline void nsim_bpf_dev_exit(struct nsim_dev *nsim_dev)
158 {
159 }
nsim_bpf_init(struct netdevsim * ns)160 static inline int nsim_bpf_init(struct netdevsim *ns)
161 {
162 return 0;
163 }
164
nsim_bpf_uninit(struct netdevsim * ns)165 static inline void nsim_bpf_uninit(struct netdevsim *ns)
166 {
167 }
168
nsim_bpf(struct net_device * dev,struct netdev_bpf * bpf)169 static inline int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf)
170 {
171 return -EOPNOTSUPP;
172 }
173
nsim_bpf_disable_tc(struct netdevsim * ns)174 static inline int nsim_bpf_disable_tc(struct netdevsim *ns)
175 {
176 return 0;
177 }
178
179 static inline int
nsim_bpf_setup_tc_block_cb(enum tc_setup_type type,void * type_data,void * cb_priv)180 nsim_bpf_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
181 void *cb_priv)
182 {
183 return -EOPNOTSUPP;
184 }
185 #endif
186
187 enum nsim_resource_id {
188 NSIM_RESOURCE_NONE, /* DEVLINK_RESOURCE_ID_PARENT_TOP */
189 NSIM_RESOURCE_IPV4,
190 NSIM_RESOURCE_IPV4_FIB,
191 NSIM_RESOURCE_IPV4_FIB_RULES,
192 NSIM_RESOURCE_IPV6,
193 NSIM_RESOURCE_IPV6_FIB,
194 NSIM_RESOURCE_IPV6_FIB_RULES,
195 NSIM_RESOURCE_NEXTHOPS,
196 };
197
198 struct nsim_dev_health {
199 struct devlink_health_reporter *empty_reporter;
200 struct devlink_health_reporter *dummy_reporter;
201 struct dentry *ddir;
202 char *recovered_break_msg;
203 u32 binary_len;
204 bool fail_recover;
205 };
206
207 int nsim_dev_health_init(struct nsim_dev *nsim_dev, struct devlink *devlink);
208 void nsim_dev_health_exit(struct nsim_dev *nsim_dev);
209
210 struct nsim_dev_hwstats_netdev {
211 struct list_head list;
212 struct net_device *netdev;
213 struct rtnl_hw_stats64 stats;
214 bool enabled;
215 bool fail_enable;
216 };
217
218 struct nsim_dev_hwstats {
219 struct dentry *ddir;
220 struct dentry *l3_ddir;
221
222 struct mutex hwsdev_list_lock; /* protects hwsdev list(s) */
223 struct list_head l3_list;
224
225 struct notifier_block netdevice_nb;
226 struct delayed_work traffic_dw;
227 };
228
229 int nsim_dev_hwstats_init(struct nsim_dev *nsim_dev);
230 void nsim_dev_hwstats_exit(struct nsim_dev *nsim_dev);
231
232 #if IS_ENABLED(CONFIG_PSAMPLE)
233 int nsim_dev_psample_init(struct nsim_dev *nsim_dev);
234 void nsim_dev_psample_exit(struct nsim_dev *nsim_dev);
235 #else
nsim_dev_psample_init(struct nsim_dev * nsim_dev)236 static inline int nsim_dev_psample_init(struct nsim_dev *nsim_dev)
237 {
238 return 0;
239 }
240
nsim_dev_psample_exit(struct nsim_dev * nsim_dev)241 static inline void nsim_dev_psample_exit(struct nsim_dev *nsim_dev)
242 {
243 }
244 #endif
245
246 enum nsim_dev_port_type {
247 NSIM_DEV_PORT_TYPE_PF,
248 NSIM_DEV_PORT_TYPE_VF,
249 };
250
251 #define NSIM_DEV_VF_PORT_INDEX_BASE 128
252 #define NSIM_DEV_VF_PORT_INDEX_MAX UINT_MAX
253
254 struct nsim_dev_port {
255 struct list_head list;
256 struct devlink_port devlink_port;
257 unsigned int port_index;
258 enum nsim_dev_port_type port_type;
259 struct dentry *ddir;
260 struct dentry *rate_parent;
261 char *parent_name;
262 struct netdevsim *ns;
263 };
264
265 struct nsim_vf_config {
266 int link_state;
267 u16 min_tx_rate;
268 u16 max_tx_rate;
269 u16 vlan;
270 __be16 vlan_proto;
271 u16 qos;
272 u8 vf_mac[ETH_ALEN];
273 bool spoofchk_enabled;
274 bool trusted;
275 bool rss_query_enabled;
276 };
277
278 struct nsim_dev {
279 struct nsim_bus_dev *nsim_bus_dev;
280 struct nsim_fib_data *fib_data;
281 struct nsim_trap_data *trap_data;
282 struct dentry *ddir;
283 struct dentry *ports_ddir;
284 struct dentry *take_snapshot;
285 struct dentry *nodes_ddir;
286
287 struct nsim_vf_config *vfconfigs;
288
289 struct bpf_offload_dev *bpf_dev;
290 bool bpf_bind_accept;
291 bool bpf_bind_verifier_accept;
292 u32 bpf_bind_verifier_delay;
293 struct dentry *ddir_bpf_bound_progs;
294 u32 prog_id_gen;
295 struct list_head bpf_bound_progs;
296 struct list_head bpf_bound_maps;
297 struct netdev_phys_item_id switch_id;
298 struct list_head port_list;
299 bool fw_update_status;
300 u32 fw_update_overwrite_mask;
301 u32 max_macs;
302 bool test1;
303 bool dont_allow_reload;
304 bool fail_reload;
305 struct devlink_region *dummy_region;
306 struct nsim_dev_health health;
307 struct nsim_dev_hwstats hwstats;
308 struct flow_action_cookie *fa_cookie;
309 spinlock_t fa_cookie_lock; /* protects fa_cookie */
310 bool fail_trap_group_set;
311 bool fail_trap_policer_set;
312 bool fail_trap_policer_counter_get;
313 bool fail_trap_drop_counter_get;
314 struct {
315 struct udp_tunnel_nic_shared utn_shared;
316 u32 __ports[2][NSIM_UDP_TUNNEL_N_PORTS];
317 bool sync_all;
318 bool open_only;
319 bool ipv4_only;
320 bool shared;
321 bool static_iana_vxlan;
322 u32 sleep;
323 } udp_ports;
324 struct nsim_dev_psample *psample;
325 u16 esw_mode;
326 };
327
nsim_esw_mode_is_legacy(struct nsim_dev * nsim_dev)328 static inline bool nsim_esw_mode_is_legacy(struct nsim_dev *nsim_dev)
329 {
330 return nsim_dev->esw_mode == DEVLINK_ESWITCH_MODE_LEGACY;
331 }
332
nsim_esw_mode_is_switchdev(struct nsim_dev * nsim_dev)333 static inline bool nsim_esw_mode_is_switchdev(struct nsim_dev *nsim_dev)
334 {
335 return nsim_dev->esw_mode == DEVLINK_ESWITCH_MODE_SWITCHDEV;
336 }
337
nsim_dev_net(struct nsim_dev * nsim_dev)338 static inline struct net *nsim_dev_net(struct nsim_dev *nsim_dev)
339 {
340 return devlink_net(priv_to_devlink(nsim_dev));
341 }
342
343 int nsim_dev_init(void);
344 void nsim_dev_exit(void);
345 int nsim_drv_probe(struct nsim_bus_dev *nsim_bus_dev);
346 void nsim_drv_remove(struct nsim_bus_dev *nsim_bus_dev);
347 int nsim_drv_port_add(struct nsim_bus_dev *nsim_bus_dev,
348 enum nsim_dev_port_type type,
349 unsigned int port_index);
350 int nsim_drv_port_del(struct nsim_bus_dev *nsim_bus_dev,
351 enum nsim_dev_port_type type,
352 unsigned int port_index);
353 int nsim_drv_configure_vfs(struct nsim_bus_dev *nsim_bus_dev,
354 unsigned int num_vfs);
355
356 unsigned int nsim_dev_get_vfs(struct nsim_dev *nsim_dev);
357
358 struct nsim_fib_data *nsim_fib_create(struct devlink *devlink,
359 struct netlink_ext_ack *extack);
360 void nsim_fib_destroy(struct devlink *devlink, struct nsim_fib_data *fib_data);
361 u64 nsim_fib_get_val(struct nsim_fib_data *fib_data,
362 enum nsim_resource_id res_id, bool max);
363
nsim_dev_port_is_pf(struct nsim_dev_port * nsim_dev_port)364 static inline bool nsim_dev_port_is_pf(struct nsim_dev_port *nsim_dev_port)
365 {
366 return nsim_dev_port->port_type == NSIM_DEV_PORT_TYPE_PF;
367 }
368
nsim_dev_port_is_vf(struct nsim_dev_port * nsim_dev_port)369 static inline bool nsim_dev_port_is_vf(struct nsim_dev_port *nsim_dev_port)
370 {
371 return nsim_dev_port->port_type == NSIM_DEV_PORT_TYPE_VF;
372 }
373 #if IS_ENABLED(CONFIG_XFRM_OFFLOAD)
374 void nsim_ipsec_init(struct netdevsim *ns);
375 void nsim_ipsec_teardown(struct netdevsim *ns);
376 bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb);
377 #else
nsim_ipsec_init(struct netdevsim * ns)378 static inline void nsim_ipsec_init(struct netdevsim *ns)
379 {
380 }
381
nsim_ipsec_teardown(struct netdevsim * ns)382 static inline void nsim_ipsec_teardown(struct netdevsim *ns)
383 {
384 }
385
nsim_ipsec_tx(struct netdevsim * ns,struct sk_buff * skb)386 static inline bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb)
387 {
388 return true;
389 }
390 #endif
391
392 #if IS_ENABLED(CONFIG_MACSEC)
393 void nsim_macsec_init(struct netdevsim *ns);
394 void nsim_macsec_teardown(struct netdevsim *ns);
395 #else
nsim_macsec_init(struct netdevsim * ns)396 static inline void nsim_macsec_init(struct netdevsim *ns)
397 {
398 }
399
nsim_macsec_teardown(struct netdevsim * ns)400 static inline void nsim_macsec_teardown(struct netdevsim *ns)
401 {
402 }
403 #endif
404
405 struct nsim_bus_dev {
406 struct device dev;
407 struct list_head list;
408 unsigned int port_count;
409 unsigned int num_queues; /* Number of queues for each port on this bus */
410 struct net *initial_net; /* Purpose of this is to carry net pointer
411 * during the probe time only.
412 */
413 unsigned int max_vfs;
414 unsigned int num_vfs;
415 bool init;
416 };
417
418 int nsim_bus_init(void);
419 void nsim_bus_exit(void);
420