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 nsim_rq {
94 struct napi_struct napi;
95 struct sk_buff_head skb_queue;
96 struct page_pool *page_pool;
97 };
98
99 struct netdevsim {
100 struct net_device *netdev;
101 struct nsim_dev *nsim_dev;
102 struct nsim_dev_port *nsim_dev_port;
103 struct mock_phc *phc;
104 struct nsim_rq *rq;
105
106 u64 tx_packets;
107 u64 tx_bytes;
108 u64 tx_dropped;
109 struct u64_stats_sync syncp;
110
111 struct nsim_bus_dev *nsim_bus_dev;
112
113 struct bpf_prog *bpf_offloaded;
114 u32 bpf_offloaded_id;
115
116 struct xdp_attachment_info xdp;
117 struct xdp_attachment_info xdp_hw;
118
119 bool bpf_tc_accept;
120 bool bpf_tc_non_bound_accept;
121 bool bpf_xdpdrv_accept;
122 bool bpf_xdpoffload_accept;
123
124 bool bpf_map_accept;
125 struct nsim_ipsec ipsec;
126 struct nsim_macsec macsec;
127 struct {
128 u32 inject_error;
129 u32 sleep;
130 u32 __ports[2][NSIM_UDP_TUNNEL_N_PORTS];
131 u32 (*ports)[NSIM_UDP_TUNNEL_N_PORTS];
132 struct debugfs_u32_array dfs_ports[2];
133 } udp_ports;
134
135 struct page *page;
136 struct dentry *pp_dfs;
137
138 struct nsim_ethtool ethtool;
139 struct netdevsim __rcu *peer;
140 };
141
142 struct netdevsim *
143 nsim_create(struct nsim_dev *nsim_dev, struct nsim_dev_port *nsim_dev_port);
144 void nsim_destroy(struct netdevsim *ns);
145 bool netdev_is_nsim(struct net_device *dev);
146
147 void nsim_ethtool_init(struct netdevsim *ns);
148
149 void nsim_udp_tunnels_debugfs_create(struct nsim_dev *nsim_dev);
150 int nsim_udp_tunnels_info_create(struct nsim_dev *nsim_dev,
151 struct net_device *dev);
152 void nsim_udp_tunnels_info_destroy(struct net_device *dev);
153
154 #ifdef CONFIG_BPF_SYSCALL
155 int nsim_bpf_dev_init(struct nsim_dev *nsim_dev);
156 void nsim_bpf_dev_exit(struct nsim_dev *nsim_dev);
157 int nsim_bpf_init(struct netdevsim *ns);
158 void nsim_bpf_uninit(struct netdevsim *ns);
159 int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf);
160 int nsim_bpf_disable_tc(struct netdevsim *ns);
161 int nsim_bpf_setup_tc_block_cb(enum tc_setup_type type,
162 void *type_data, void *cb_priv);
163 #else
164
nsim_bpf_dev_init(struct nsim_dev * nsim_dev)165 static inline int nsim_bpf_dev_init(struct nsim_dev *nsim_dev)
166 {
167 return 0;
168 }
169
nsim_bpf_dev_exit(struct nsim_dev * nsim_dev)170 static inline void nsim_bpf_dev_exit(struct nsim_dev *nsim_dev)
171 {
172 }
nsim_bpf_init(struct netdevsim * ns)173 static inline int nsim_bpf_init(struct netdevsim *ns)
174 {
175 return 0;
176 }
177
nsim_bpf_uninit(struct netdevsim * ns)178 static inline void nsim_bpf_uninit(struct netdevsim *ns)
179 {
180 }
181
nsim_bpf(struct net_device * dev,struct netdev_bpf * bpf)182 static inline int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf)
183 {
184 return -EOPNOTSUPP;
185 }
186
nsim_bpf_disable_tc(struct netdevsim * ns)187 static inline int nsim_bpf_disable_tc(struct netdevsim *ns)
188 {
189 return 0;
190 }
191
192 static inline int
nsim_bpf_setup_tc_block_cb(enum tc_setup_type type,void * type_data,void * cb_priv)193 nsim_bpf_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
194 void *cb_priv)
195 {
196 return -EOPNOTSUPP;
197 }
198 #endif
199
200 enum nsim_resource_id {
201 NSIM_RESOURCE_NONE, /* DEVLINK_RESOURCE_ID_PARENT_TOP */
202 NSIM_RESOURCE_IPV4,
203 NSIM_RESOURCE_IPV4_FIB,
204 NSIM_RESOURCE_IPV4_FIB_RULES,
205 NSIM_RESOURCE_IPV6,
206 NSIM_RESOURCE_IPV6_FIB,
207 NSIM_RESOURCE_IPV6_FIB_RULES,
208 NSIM_RESOURCE_NEXTHOPS,
209 };
210
211 struct nsim_dev_health {
212 struct devlink_health_reporter *empty_reporter;
213 struct devlink_health_reporter *dummy_reporter;
214 struct dentry *ddir;
215 char *recovered_break_msg;
216 u32 binary_len;
217 bool fail_recover;
218 };
219
220 int nsim_dev_health_init(struct nsim_dev *nsim_dev, struct devlink *devlink);
221 void nsim_dev_health_exit(struct nsim_dev *nsim_dev);
222
223 struct nsim_dev_hwstats_netdev {
224 struct list_head list;
225 struct net_device *netdev;
226 struct rtnl_hw_stats64 stats;
227 bool enabled;
228 bool fail_enable;
229 };
230
231 struct nsim_dev_hwstats {
232 struct dentry *ddir;
233 struct dentry *l3_ddir;
234
235 struct mutex hwsdev_list_lock; /* protects hwsdev list(s) */
236 struct list_head l3_list;
237
238 struct notifier_block netdevice_nb;
239 struct delayed_work traffic_dw;
240 };
241
242 int nsim_dev_hwstats_init(struct nsim_dev *nsim_dev);
243 void nsim_dev_hwstats_exit(struct nsim_dev *nsim_dev);
244
245 #if IS_ENABLED(CONFIG_PSAMPLE)
246 int nsim_dev_psample_init(struct nsim_dev *nsim_dev);
247 void nsim_dev_psample_exit(struct nsim_dev *nsim_dev);
248 #else
nsim_dev_psample_init(struct nsim_dev * nsim_dev)249 static inline int nsim_dev_psample_init(struct nsim_dev *nsim_dev)
250 {
251 return 0;
252 }
253
nsim_dev_psample_exit(struct nsim_dev * nsim_dev)254 static inline void nsim_dev_psample_exit(struct nsim_dev *nsim_dev)
255 {
256 }
257 #endif
258
259 enum nsim_dev_port_type {
260 NSIM_DEV_PORT_TYPE_PF,
261 NSIM_DEV_PORT_TYPE_VF,
262 };
263
264 #define NSIM_DEV_VF_PORT_INDEX_BASE 128
265 #define NSIM_DEV_VF_PORT_INDEX_MAX UINT_MAX
266
267 struct nsim_dev_port {
268 struct list_head list;
269 struct devlink_port devlink_port;
270 unsigned int port_index;
271 enum nsim_dev_port_type port_type;
272 struct dentry *ddir;
273 struct dentry *rate_parent;
274 char *parent_name;
275 struct netdevsim *ns;
276 };
277
278 struct nsim_vf_config {
279 int link_state;
280 u16 min_tx_rate;
281 u16 max_tx_rate;
282 u16 vlan;
283 __be16 vlan_proto;
284 u16 qos;
285 u8 vf_mac[ETH_ALEN];
286 bool spoofchk_enabled;
287 bool trusted;
288 bool rss_query_enabled;
289 };
290
291 struct nsim_dev {
292 struct nsim_bus_dev *nsim_bus_dev;
293 struct nsim_fib_data *fib_data;
294 struct nsim_trap_data *trap_data;
295 struct dentry *ddir;
296 struct dentry *ports_ddir;
297 struct dentry *take_snapshot;
298 struct dentry *nodes_ddir;
299
300 struct nsim_vf_config *vfconfigs;
301
302 struct bpf_offload_dev *bpf_dev;
303 bool bpf_bind_accept;
304 bool bpf_bind_verifier_accept;
305 u32 bpf_bind_verifier_delay;
306 struct dentry *ddir_bpf_bound_progs;
307 u32 prog_id_gen;
308 struct list_head bpf_bound_progs;
309 struct list_head bpf_bound_maps;
310 struct netdev_phys_item_id switch_id;
311 struct list_head port_list;
312 bool fw_update_status;
313 u32 fw_update_overwrite_mask;
314 u32 max_macs;
315 bool test1;
316 bool dont_allow_reload;
317 bool fail_reload;
318 struct devlink_region *dummy_region;
319 struct nsim_dev_health health;
320 struct nsim_dev_hwstats hwstats;
321 struct flow_action_cookie *fa_cookie;
322 spinlock_t fa_cookie_lock; /* protects fa_cookie */
323 bool fail_trap_group_set;
324 bool fail_trap_policer_set;
325 bool fail_trap_policer_counter_get;
326 bool fail_trap_drop_counter_get;
327 struct {
328 struct udp_tunnel_nic_shared utn_shared;
329 u32 __ports[2][NSIM_UDP_TUNNEL_N_PORTS];
330 bool sync_all;
331 bool open_only;
332 bool ipv4_only;
333 bool shared;
334 bool static_iana_vxlan;
335 u32 sleep;
336 } udp_ports;
337 struct nsim_dev_psample *psample;
338 u16 esw_mode;
339 };
340
nsim_esw_mode_is_legacy(struct nsim_dev * nsim_dev)341 static inline bool nsim_esw_mode_is_legacy(struct nsim_dev *nsim_dev)
342 {
343 return nsim_dev->esw_mode == DEVLINK_ESWITCH_MODE_LEGACY;
344 }
345
nsim_esw_mode_is_switchdev(struct nsim_dev * nsim_dev)346 static inline bool nsim_esw_mode_is_switchdev(struct nsim_dev *nsim_dev)
347 {
348 return nsim_dev->esw_mode == DEVLINK_ESWITCH_MODE_SWITCHDEV;
349 }
350
nsim_dev_net(struct nsim_dev * nsim_dev)351 static inline struct net *nsim_dev_net(struct nsim_dev *nsim_dev)
352 {
353 return devlink_net(priv_to_devlink(nsim_dev));
354 }
355
356 int nsim_dev_init(void);
357 void nsim_dev_exit(void);
358 int nsim_drv_probe(struct nsim_bus_dev *nsim_bus_dev);
359 void nsim_drv_remove(struct nsim_bus_dev *nsim_bus_dev);
360 int nsim_drv_port_add(struct nsim_bus_dev *nsim_bus_dev,
361 enum nsim_dev_port_type type,
362 unsigned int port_index);
363 int nsim_drv_port_del(struct nsim_bus_dev *nsim_bus_dev,
364 enum nsim_dev_port_type type,
365 unsigned int port_index);
366 int nsim_drv_configure_vfs(struct nsim_bus_dev *nsim_bus_dev,
367 unsigned int num_vfs);
368
369 unsigned int nsim_dev_get_vfs(struct nsim_dev *nsim_dev);
370
371 struct nsim_fib_data *nsim_fib_create(struct devlink *devlink,
372 struct netlink_ext_ack *extack);
373 void nsim_fib_destroy(struct devlink *devlink, struct nsim_fib_data *fib_data);
374 u64 nsim_fib_get_val(struct nsim_fib_data *fib_data,
375 enum nsim_resource_id res_id, bool max);
376
nsim_dev_port_is_pf(struct nsim_dev_port * nsim_dev_port)377 static inline bool nsim_dev_port_is_pf(struct nsim_dev_port *nsim_dev_port)
378 {
379 return nsim_dev_port->port_type == NSIM_DEV_PORT_TYPE_PF;
380 }
381
nsim_dev_port_is_vf(struct nsim_dev_port * nsim_dev_port)382 static inline bool nsim_dev_port_is_vf(struct nsim_dev_port *nsim_dev_port)
383 {
384 return nsim_dev_port->port_type == NSIM_DEV_PORT_TYPE_VF;
385 }
386 #if IS_ENABLED(CONFIG_XFRM_OFFLOAD)
387 void nsim_ipsec_init(struct netdevsim *ns);
388 void nsim_ipsec_teardown(struct netdevsim *ns);
389 bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb);
390 #else
nsim_ipsec_init(struct netdevsim * ns)391 static inline void nsim_ipsec_init(struct netdevsim *ns)
392 {
393 }
394
nsim_ipsec_teardown(struct netdevsim * ns)395 static inline void nsim_ipsec_teardown(struct netdevsim *ns)
396 {
397 }
398
nsim_ipsec_tx(struct netdevsim * ns,struct sk_buff * skb)399 static inline bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb)
400 {
401 return true;
402 }
403 #endif
404
405 #if IS_ENABLED(CONFIG_MACSEC)
406 void nsim_macsec_init(struct netdevsim *ns);
407 void nsim_macsec_teardown(struct netdevsim *ns);
408 #else
nsim_macsec_init(struct netdevsim * ns)409 static inline void nsim_macsec_init(struct netdevsim *ns)
410 {
411 }
412
nsim_macsec_teardown(struct netdevsim * ns)413 static inline void nsim_macsec_teardown(struct netdevsim *ns)
414 {
415 }
416 #endif
417
418 struct nsim_bus_dev {
419 struct device dev;
420 struct list_head list;
421 unsigned int port_count;
422 unsigned int num_queues; /* Number of queues for each port on this bus */
423 struct net *initial_net; /* Purpose of this is to carry net pointer
424 * during the probe time only.
425 */
426 unsigned int max_vfs;
427 unsigned int num_vfs;
428 bool init;
429 };
430
431 int nsim_bus_init(void);
432 void nsim_bus_exit(void);
433