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