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 <linux/u64_stats_sync.h> 26 #include <net/devlink.h> 27 #include <net/udp_tunnel.h> 28 #include <net/xdp.h> 29 #include <net/macsec.h> 30 31 #define DRV_NAME "netdevsim" 32 33 #define NSIM_XDP_MAX_MTU 4000 34 35 #define NSIM_EA(extack, msg) NL_SET_ERR_MSG_MOD((extack), msg) 36 37 #define NSIM_IPSEC_MAX_SA_COUNT 33 38 #define NSIM_IPSEC_VALID BIT(31) 39 #define NSIM_UDP_TUNNEL_N_PORTS 4 40 41 #define NSIM_HDS_THRESHOLD_MAX 1024 42 43 struct nsim_sa { 44 struct xfrm_state *xs; 45 __be32 ipaddr[4]; 46 u32 key[4]; 47 u32 salt; 48 bool used; 49 bool crypt; 50 bool rx; 51 }; 52 53 struct nsim_ipsec { 54 struct nsim_sa sa[NSIM_IPSEC_MAX_SA_COUNT]; 55 struct dentry *pfile; 56 u32 count; 57 u32 tx; 58 }; 59 60 #define NSIM_MACSEC_MAX_SECY_COUNT 3 61 #define NSIM_MACSEC_MAX_RXSC_COUNT 1 62 struct nsim_rxsc { 63 sci_t sci; 64 bool used; 65 }; 66 67 struct nsim_secy { 68 sci_t sci; 69 struct nsim_rxsc nsim_rxsc[NSIM_MACSEC_MAX_RXSC_COUNT]; 70 u8 nsim_rxsc_count; 71 bool used; 72 }; 73 74 struct nsim_macsec { 75 struct nsim_secy nsim_secy[NSIM_MACSEC_MAX_SECY_COUNT]; 76 u8 nsim_secy_count; 77 }; 78 79 struct nsim_vlan { 80 DECLARE_BITMAP(ctag, VLAN_N_VID); 81 DECLARE_BITMAP(stag, VLAN_N_VID); 82 }; 83 84 struct nsim_ethtool_pauseparam { 85 bool rx; 86 bool tx; 87 bool report_stats_rx; 88 bool report_stats_tx; 89 }; 90 91 struct nsim_ethtool { 92 u32 get_err; 93 u32 set_err; 94 u32 channels; 95 struct nsim_ethtool_pauseparam pauseparam; 96 struct ethtool_coalesce coalesce; 97 struct ethtool_ringparam ring; 98 struct ethtool_fecparam fec; 99 }; 100 101 struct nsim_rq { 102 struct napi_struct napi; 103 struct sk_buff_head skb_queue; 104 struct page_pool *page_pool; 105 struct hrtimer napi_timer; 106 }; 107 108 struct netdevsim { 109 struct net_device *netdev; 110 struct nsim_dev *nsim_dev; 111 struct nsim_dev_port *nsim_dev_port; 112 struct mock_phc *phc; 113 struct nsim_rq **rq; 114 115 int rq_reset_mode; 116 117 struct { 118 u64_stats_t rx_packets; 119 u64_stats_t rx_bytes; 120 u64_stats_t tx_packets; 121 u64_stats_t tx_bytes; 122 struct u64_stats_sync syncp; 123 struct psp_dev __rcu *dev; 124 struct dentry *rereg; 125 struct mutex rereg_lock; 126 u32 spi; 127 u32 assoc_cnt; 128 } psp; 129 130 struct nsim_bus_dev *nsim_bus_dev; 131 132 struct bpf_prog *bpf_offloaded; 133 u32 bpf_offloaded_id; 134 135 struct xdp_attachment_info xdp; 136 struct xdp_attachment_info xdp_hw; 137 138 bool bpf_tc_accept; 139 bool bpf_tc_non_bound_accept; 140 bool bpf_xdpdrv_accept; 141 bool bpf_xdpoffload_accept; 142 143 bool bpf_map_accept; 144 struct nsim_ipsec ipsec; 145 struct nsim_macsec macsec; 146 struct nsim_vlan vlan; 147 struct { 148 u32 inject_error; 149 u32 __ports[2][NSIM_UDP_TUNNEL_N_PORTS]; 150 u32 (*ports)[NSIM_UDP_TUNNEL_N_PORTS]; 151 struct dentry *ddir; 152 struct debugfs_u32_array dfs_ports[2]; 153 } udp_ports; 154 155 struct page *page; 156 struct dentry *pp_dfs; 157 struct dentry *qr_dfs; 158 struct dentry *vlan_dfs; 159 160 struct nsim_ethtool ethtool; 161 struct netdevsim __rcu *peer; 162 163 struct notifier_block nb; 164 struct netdev_net_notifier nn; 165 }; 166 167 struct netdevsim *nsim_create(struct nsim_dev *nsim_dev, 168 struct nsim_dev_port *nsim_dev_port, 169 u8 perm_addr[ETH_ALEN]); 170 void nsim_destroy(struct netdevsim *ns); 171 bool netdev_is_nsim(struct net_device *dev); 172 173 void nsim_ethtool_init(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 190 191 static inline int nsim_bpf_dev_init(struct nsim_dev *nsim_dev) 192 { 193 return 0; 194 } 195 196 static inline void nsim_bpf_dev_exit(struct nsim_dev *nsim_dev) 197 { 198 } 199 static inline int nsim_bpf_init(struct netdevsim *ns) 200 { 201 return 0; 202 } 203 204 static inline void nsim_bpf_uninit(struct netdevsim *ns) 205 { 206 } 207 208 static inline int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf) 209 { 210 return -EOPNOTSUPP; 211 } 212 213 static inline int nsim_bpf_disable_tc(struct netdevsim *ns) 214 { 215 return 0; 216 } 217 218 static inline int 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 279 static inline int nsim_dev_psample_init(struct nsim_dev *nsim_dev) 280 { 281 return 0; 282 } 283 284 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 }; 373 374 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 } 378 379 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 } 383 384 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); 409 410 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 } 414 415 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 424 static inline void nsim_ipsec_init(struct netdevsim *ns) 425 { 426 } 427 428 static inline void nsim_ipsec_teardown(struct netdevsim *ns) 429 { 430 } 431 432 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 442 static inline void nsim_macsec_init(struct netdevsim *ns) 443 { 444 } 445 446 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 459 static inline int nsim_psp_init(struct netdevsim *ns) { return 0; } 460 static inline void nsim_psp_uninit(struct netdevsim *ns) {} 461 static inline enum skb_drop_reason 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 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