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/ethtool_netlink.h>
20 #include <linux/kernel.h>
21 #include <linux/if_vlan.h>
22 #include <linux/list.h>
23 #include <linux/netdevice.h>
24 #include <linux/ptp_mock.h>
25 #include <net/devlink.h>
26 #include <net/udp_tunnel.h>
27 #include <net/xdp.h>
28 #include <net/macsec.h>
29
30 #define DRV_NAME "netdevsim"
31
32 #define NSIM_XDP_MAX_MTU 4000
33
34 #define NSIM_EA(extack, msg) NL_SET_ERR_MSG_MOD((extack), msg)
35
36 #define NSIM_IPSEC_MAX_SA_COUNT 33
37 #define NSIM_IPSEC_VALID BIT(31)
38 #define NSIM_UDP_TUNNEL_N_PORTS 4
39
40 #define NSIM_HDS_THRESHOLD_MAX 1024
41
42 struct nsim_sa {
43 struct xfrm_state *xs;
44 __be32 ipaddr[4];
45 u32 key[4];
46 u32 salt;
47 bool used;
48 bool crypt;
49 bool rx;
50 };
51
52 struct nsim_ipsec {
53 struct nsim_sa sa[NSIM_IPSEC_MAX_SA_COUNT];
54 struct dentry *pfile;
55 u32 count;
56 u32 tx;
57 };
58
59 #define NSIM_MACSEC_MAX_SECY_COUNT 3
60 #define NSIM_MACSEC_MAX_RXSC_COUNT 1
61 struct nsim_rxsc {
62 sci_t sci;
63 bool used;
64 };
65
66 struct nsim_secy {
67 sci_t sci;
68 struct nsim_rxsc nsim_rxsc[NSIM_MACSEC_MAX_RXSC_COUNT];
69 u8 nsim_rxsc_count;
70 bool used;
71 };
72
73 struct nsim_macsec {
74 struct nsim_secy nsim_secy[NSIM_MACSEC_MAX_SECY_COUNT];
75 u8 nsim_secy_count;
76 };
77
78 struct nsim_vlan {
79 DECLARE_BITMAP(ctag, VLAN_N_VID);
80 DECLARE_BITMAP(stag, VLAN_N_VID);
81 };
82
83 struct nsim_ethtool_pauseparam {
84 bool rx;
85 bool tx;
86 bool report_stats_rx;
87 bool report_stats_tx;
88 };
89
90 struct nsim_ethtool {
91 u32 get_err;
92 u32 set_err;
93 u32 channels;
94 struct nsim_ethtool_pauseparam pauseparam;
95 struct ethtool_coalesce coalesce;
96 struct ethtool_ringparam ring;
97 struct ethtool_fecparam fec;
98 };
99
100 struct nsim_rq {
101 struct napi_struct napi;
102 struct sk_buff_head skb_queue;
103 struct page_pool *page_pool;
104 struct hrtimer napi_timer;
105 };
106
107 struct netdevsim {
108 struct net_device *netdev;
109 struct nsim_dev *nsim_dev;
110 struct nsim_dev_port *nsim_dev_port;
111 struct mock_phc *phc;
112 struct nsim_rq **rq;
113
114 int rq_reset_mode;
115
116 struct {
117 atomic64_t rx_packets;
118 atomic64_t rx_bytes;
119 atomic64_t tx_packets;
120 atomic64_t tx_bytes;
121 struct psp_dev __rcu *dev;
122 struct dentry *rereg;
123 struct mutex rereg_lock;
124 u32 spi;
125 u32 assoc_cnt;
126 } psp;
127
128 struct nsim_bus_dev *nsim_bus_dev;
129
130 struct bpf_prog *bpf_offloaded;
131 u32 bpf_offloaded_id;
132
133 struct xdp_attachment_info xdp;
134 struct xdp_attachment_info xdp_hw;
135
136 bool bpf_tc_accept;
137 bool bpf_tc_non_bound_accept;
138 bool bpf_xdpdrv_accept;
139 bool bpf_xdpoffload_accept;
140
141 bool bpf_map_accept;
142 struct nsim_ipsec ipsec;
143 struct nsim_macsec macsec;
144 struct nsim_vlan vlan;
145 struct {
146 u32 inject_error;
147 u32 __ports[2][NSIM_UDP_TUNNEL_N_PORTS];
148 u32 (*ports)[NSIM_UDP_TUNNEL_N_PORTS];
149 struct dentry *ddir;
150 struct debugfs_u32_array dfs_ports[2];
151 } udp_ports;
152
153 struct page *page;
154 struct dentry *pp_dfs;
155 struct dentry *qr_dfs;
156 struct dentry *vlan_dfs;
157 struct dentry *ethtool_ddir;
158
159 struct nsim_ethtool ethtool;
160 struct netdevsim __rcu *peer;
161
162 struct notifier_block nb;
163 struct netdev_net_notifier nn;
164 };
165
166 struct netdevsim *nsim_create(struct nsim_dev *nsim_dev,
167 struct nsim_dev_port *nsim_dev_port,
168 u8 perm_addr[ETH_ALEN]);
169 void nsim_destroy(struct netdevsim *ns);
170 bool netdev_is_nsim(struct net_device *dev);
171
172 void nsim_ethtool_init(struct netdevsim *ns);
173 void nsim_ethtool_fini(struct netdevsim *ns);
174
175 void nsim_udp_tunnels_debugfs_create(struct nsim_dev *nsim_dev);
176 int nsim_udp_tunnels_info_create(struct nsim_dev *nsim_dev,
177 struct net_device *dev);
178 void nsim_udp_tunnels_info_destroy(struct net_device *dev);
179
180 #ifdef CONFIG_BPF_SYSCALL
181 int nsim_bpf_dev_init(struct nsim_dev *nsim_dev);
182 void nsim_bpf_dev_exit(struct nsim_dev *nsim_dev);
183 int nsim_bpf_init(struct netdevsim *ns);
184 void nsim_bpf_uninit(struct netdevsim *ns);
185 int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf);
186 int nsim_bpf_disable_tc(struct netdevsim *ns);
187 int nsim_bpf_setup_tc_block_cb(enum tc_setup_type type,
188 void *type_data, void *cb_priv);
189 #else
190
nsim_bpf_dev_init(struct nsim_dev * nsim_dev)191 static inline int nsim_bpf_dev_init(struct nsim_dev *nsim_dev)
192 {
193 return 0;
194 }
195
nsim_bpf_dev_exit(struct nsim_dev * nsim_dev)196 static inline void nsim_bpf_dev_exit(struct nsim_dev *nsim_dev)
197 {
198 }
nsim_bpf_init(struct netdevsim * ns)199 static inline int nsim_bpf_init(struct netdevsim *ns)
200 {
201 return 0;
202 }
203
nsim_bpf_uninit(struct netdevsim * ns)204 static inline void nsim_bpf_uninit(struct netdevsim *ns)
205 {
206 }
207
nsim_bpf(struct net_device * dev,struct netdev_bpf * bpf)208 static inline int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf)
209 {
210 return -EOPNOTSUPP;
211 }
212
nsim_bpf_disable_tc(struct netdevsim * ns)213 static inline int nsim_bpf_disable_tc(struct netdevsim *ns)
214 {
215 return 0;
216 }
217
218 static inline int
nsim_bpf_setup_tc_block_cb(enum tc_setup_type type,void * type_data,void * cb_priv)219 nsim_bpf_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
220 void *cb_priv)
221 {
222 return -EOPNOTSUPP;
223 }
224 #endif
225
226 enum nsim_resource_id {
227 NSIM_RESOURCE_NONE, /* DEVLINK_RESOURCE_ID_PARENT_TOP */
228 NSIM_RESOURCE_IPV4,
229 NSIM_RESOURCE_IPV4_FIB,
230 NSIM_RESOURCE_IPV4_FIB_RULES,
231 NSIM_RESOURCE_IPV6,
232 NSIM_RESOURCE_IPV6_FIB,
233 NSIM_RESOURCE_IPV6_FIB_RULES,
234 NSIM_RESOURCE_NEXTHOPS,
235 };
236
237 enum nsim_port_resource_id {
238 NSIM_PORT_RESOURCE_TEST = 1,
239 };
240
241 struct nsim_dev_health {
242 struct devlink_health_reporter *empty_reporter;
243 struct devlink_health_reporter *dummy_reporter;
244 struct dentry *ddir;
245 char *recovered_break_msg;
246 u32 binary_len;
247 bool fail_recover;
248 };
249
250 int nsim_dev_health_init(struct nsim_dev *nsim_dev, struct devlink *devlink);
251 void nsim_dev_health_exit(struct nsim_dev *nsim_dev);
252
253 struct nsim_dev_hwstats_netdev {
254 struct list_head list;
255 struct net_device *netdev;
256 struct rtnl_hw_stats64 stats;
257 bool enabled;
258 bool fail_enable;
259 };
260
261 struct nsim_dev_hwstats {
262 struct dentry *ddir;
263 struct dentry *l3_ddir;
264
265 struct mutex hwsdev_list_lock; /* protects hwsdev list(s) */
266 struct list_head l3_list;
267
268 struct notifier_block netdevice_nb;
269 struct delayed_work traffic_dw;
270 };
271
272 int nsim_dev_hwstats_init(struct nsim_dev *nsim_dev);
273 void nsim_dev_hwstats_exit(struct nsim_dev *nsim_dev);
274
275 #if IS_ENABLED(CONFIG_PSAMPLE)
276 int nsim_dev_psample_init(struct nsim_dev *nsim_dev);
277 void nsim_dev_psample_exit(struct nsim_dev *nsim_dev);
278 #else
nsim_dev_psample_init(struct nsim_dev * nsim_dev)279 static inline int nsim_dev_psample_init(struct nsim_dev *nsim_dev)
280 {
281 return 0;
282 }
283
nsim_dev_psample_exit(struct nsim_dev * nsim_dev)284 static inline void nsim_dev_psample_exit(struct nsim_dev *nsim_dev)
285 {
286 }
287 #endif
288
289 enum nsim_dev_port_type {
290 NSIM_DEV_PORT_TYPE_PF,
291 NSIM_DEV_PORT_TYPE_VF,
292 };
293
294 #define NSIM_DEV_VF_PORT_INDEX_BASE 128
295 #define NSIM_DEV_VF_PORT_INDEX_MAX UINT_MAX
296
297 struct nsim_dev_port {
298 struct list_head list;
299 struct devlink_port devlink_port;
300 unsigned int port_index;
301 enum nsim_dev_port_type port_type;
302 struct dentry *ddir;
303 struct dentry *rate_parent;
304 char *parent_name;
305 u32 tc_bw[DEVLINK_RATE_TCS_MAX];
306 struct netdevsim *ns;
307 };
308
309 struct nsim_vf_config {
310 int link_state;
311 u16 min_tx_rate;
312 u16 max_tx_rate;
313 u16 vlan;
314 __be16 vlan_proto;
315 u16 qos;
316 u8 vf_mac[ETH_ALEN];
317 bool spoofchk_enabled;
318 bool trusted;
319 bool rss_query_enabled;
320 };
321
322 struct nsim_dev {
323 struct nsim_bus_dev *nsim_bus_dev;
324 struct nsim_fib_data *fib_data;
325 struct nsim_trap_data *trap_data;
326 struct dentry *ddir;
327 struct dentry *ports_ddir;
328 struct dentry *take_snapshot;
329 struct dentry *nodes_ddir;
330
331 struct nsim_vf_config *vfconfigs;
332
333 struct bpf_offload_dev *bpf_dev;
334 bool bpf_bind_accept;
335 bool bpf_bind_verifier_accept;
336 u32 bpf_bind_verifier_delay;
337 struct dentry *ddir_bpf_bound_progs;
338 u32 prog_id_gen;
339 struct list_head bpf_bound_progs;
340 struct list_head bpf_bound_maps;
341 struct mutex progs_list_lock;
342 struct netdev_phys_item_id switch_id;
343 struct list_head port_list;
344 bool fw_update_status;
345 u32 fw_update_overwrite_mask;
346 u32 fw_update_flash_chunk_time_ms;
347 u32 max_macs;
348 bool test1;
349 u32 test2;
350 bool dont_allow_reload;
351 bool fail_reload;
352 struct devlink_region *dummy_region;
353 struct nsim_dev_health health;
354 struct nsim_dev_hwstats hwstats;
355 struct flow_action_cookie *fa_cookie;
356 spinlock_t fa_cookie_lock; /* protects fa_cookie */
357 bool fail_trap_group_set;
358 bool fail_trap_policer_set;
359 bool fail_trap_policer_counter_get;
360 bool fail_trap_drop_counter_get;
361 struct {
362 struct udp_tunnel_nic_shared utn_shared;
363 u32 __ports[2][NSIM_UDP_TUNNEL_N_PORTS];
364 bool sync_all;
365 bool open_only;
366 bool ipv4_only;
367 bool shared;
368 bool static_iana_vxlan;
369 } udp_ports;
370 struct nsim_dev_psample *psample;
371 u16 esw_mode;
372 };
373
nsim_esw_mode_is_legacy(struct nsim_dev * nsim_dev)374 static inline bool nsim_esw_mode_is_legacy(struct nsim_dev *nsim_dev)
375 {
376 return nsim_dev->esw_mode == DEVLINK_ESWITCH_MODE_LEGACY;
377 }
378
nsim_esw_mode_is_switchdev(struct nsim_dev * nsim_dev)379 static inline bool nsim_esw_mode_is_switchdev(struct nsim_dev *nsim_dev)
380 {
381 return nsim_dev->esw_mode == DEVLINK_ESWITCH_MODE_SWITCHDEV;
382 }
383
nsim_dev_net(struct nsim_dev * nsim_dev)384 static inline struct net *nsim_dev_net(struct nsim_dev *nsim_dev)
385 {
386 return devlink_net(priv_to_devlink(nsim_dev));
387 }
388
389 int nsim_dev_init(void);
390 void nsim_dev_exit(void);
391 int nsim_drv_probe(struct nsim_bus_dev *nsim_bus_dev);
392 void nsim_drv_remove(struct nsim_bus_dev *nsim_bus_dev);
393 int nsim_drv_port_add(struct nsim_bus_dev *nsim_bus_dev,
394 enum nsim_dev_port_type type, unsigned int port_index,
395 u8 perm_addr[ETH_ALEN]);
396 int nsim_drv_port_del(struct nsim_bus_dev *nsim_bus_dev,
397 enum nsim_dev_port_type type,
398 unsigned int port_index);
399 int nsim_drv_configure_vfs(struct nsim_bus_dev *nsim_bus_dev,
400 unsigned int num_vfs);
401
402 unsigned int nsim_dev_get_vfs(struct nsim_dev *nsim_dev);
403
404 struct nsim_fib_data *nsim_fib_create(struct devlink *devlink,
405 struct netlink_ext_ack *extack);
406 void nsim_fib_destroy(struct devlink *devlink, struct nsim_fib_data *fib_data);
407 u64 nsim_fib_get_val(struct nsim_fib_data *fib_data,
408 enum nsim_resource_id res_id, bool max);
409
nsim_dev_port_is_pf(struct nsim_dev_port * nsim_dev_port)410 static inline bool nsim_dev_port_is_pf(struct nsim_dev_port *nsim_dev_port)
411 {
412 return nsim_dev_port->port_type == NSIM_DEV_PORT_TYPE_PF;
413 }
414
nsim_dev_port_is_vf(struct nsim_dev_port * nsim_dev_port)415 static inline bool nsim_dev_port_is_vf(struct nsim_dev_port *nsim_dev_port)
416 {
417 return nsim_dev_port->port_type == NSIM_DEV_PORT_TYPE_VF;
418 }
419 #if IS_ENABLED(CONFIG_XFRM_OFFLOAD)
420 void nsim_ipsec_init(struct netdevsim *ns);
421 void nsim_ipsec_teardown(struct netdevsim *ns);
422 bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb);
423 #else
nsim_ipsec_init(struct netdevsim * ns)424 static inline void nsim_ipsec_init(struct netdevsim *ns)
425 {
426 }
427
nsim_ipsec_teardown(struct netdevsim * ns)428 static inline void nsim_ipsec_teardown(struct netdevsim *ns)
429 {
430 }
431
nsim_ipsec_tx(struct netdevsim * ns,struct sk_buff * skb)432 static inline bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb)
433 {
434 return true;
435 }
436 #endif
437
438 #if IS_ENABLED(CONFIG_MACSEC)
439 void nsim_macsec_init(struct netdevsim *ns);
440 void nsim_macsec_teardown(struct netdevsim *ns);
441 #else
nsim_macsec_init(struct netdevsim * ns)442 static inline void nsim_macsec_init(struct netdevsim *ns)
443 {
444 }
445
nsim_macsec_teardown(struct netdevsim * ns)446 static inline void nsim_macsec_teardown(struct netdevsim *ns)
447 {
448 }
449 #endif
450
451 #if IS_ENABLED(CONFIG_INET_PSP)
452 int nsim_psp_init(struct netdevsim *ns);
453 void nsim_psp_uninit(struct netdevsim *ns);
454 void nsim_psp_handle_ext(struct sk_buff *skb, struct skb_ext *psp_ext);
455 enum skb_drop_reason
456 nsim_do_psp(struct sk_buff *skb, struct netdevsim *ns,
457 struct netdevsim *peer_ns, struct skb_ext **psp_ext);
458 #else
nsim_psp_init(struct netdevsim * ns)459 static inline int nsim_psp_init(struct netdevsim *ns) { return 0; }
nsim_psp_uninit(struct netdevsim * ns)460 static inline void nsim_psp_uninit(struct netdevsim *ns) {}
461 static inline enum skb_drop_reason
nsim_do_psp(struct sk_buff * skb,struct netdevsim * ns,struct netdevsim * peer_ns,struct skb_ext ** psp_ext)462 nsim_do_psp(struct sk_buff *skb, struct netdevsim *ns,
463 struct netdevsim *peer_ns, struct skb_ext **psp_ext)
464 {
465 return 0;
466 }
467
468 static inline void
nsim_psp_handle_ext(struct sk_buff * skb,struct skb_ext * psp_ext)469 nsim_psp_handle_ext(struct sk_buff *skb, struct skb_ext *psp_ext) {}
470 #endif
471
472 int nsim_setup_tc(struct net_device *dev, enum tc_setup_type type,
473 void *type_data);
474
475 struct nsim_bus_dev {
476 struct device dev;
477 struct list_head list;
478 unsigned int port_count;
479 unsigned int num_queues; /* Number of queues for each port on this bus */
480 struct net *initial_net; /* Purpose of this is to carry net pointer
481 * during the probe time only.
482 */
483 unsigned int max_vfs;
484 unsigned int num_vfs;
485 bool init;
486 };
487
488 int nsim_bus_init(void);
489 void nsim_bus_exit(void);
490