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