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/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 37 struct 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 47 struct 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 55 struct nsim_ethtool_pauseparam { 56 bool rx; 57 bool tx; 58 bool report_stats_rx; 59 bool report_stats_tx; 60 }; 61 62 struct nsim_ethtool { 63 u32 get_err; 64 u32 set_err; 65 u32 channels; 66 struct nsim_ethtool_pauseparam pauseparam; 67 struct ethtool_coalesce coalesce; 68 struct ethtool_ringparam ring; 69 struct ethtool_fecparam fec; 70 }; 71 72 struct netdevsim { 73 struct net_device *netdev; 74 struct nsim_dev *nsim_dev; 75 struct nsim_dev_port *nsim_dev_port; 76 77 u64 tx_packets; 78 u64 tx_bytes; 79 struct u64_stats_sync syncp; 80 81 struct nsim_bus_dev *nsim_bus_dev; 82 83 struct bpf_prog *bpf_offloaded; 84 u32 bpf_offloaded_id; 85 86 struct xdp_attachment_info xdp; 87 struct xdp_attachment_info xdp_hw; 88 89 bool bpf_tc_accept; 90 bool bpf_tc_non_bound_accept; 91 bool bpf_xdpdrv_accept; 92 bool bpf_xdpoffload_accept; 93 94 bool bpf_map_accept; 95 struct nsim_ipsec ipsec; 96 struct { 97 u32 inject_error; 98 u32 sleep; 99 u32 __ports[2][NSIM_UDP_TUNNEL_N_PORTS]; 100 u32 (*ports)[NSIM_UDP_TUNNEL_N_PORTS]; 101 struct debugfs_u32_array dfs_ports[2]; 102 } udp_ports; 103 104 struct nsim_ethtool ethtool; 105 }; 106 107 struct netdevsim * 108 nsim_create(struct nsim_dev *nsim_dev, struct nsim_dev_port *nsim_dev_port); 109 void nsim_destroy(struct netdevsim *ns); 110 111 void nsim_ethtool_init(struct netdevsim *ns); 112 113 void nsim_udp_tunnels_debugfs_create(struct nsim_dev *nsim_dev); 114 int nsim_udp_tunnels_info_create(struct nsim_dev *nsim_dev, 115 struct net_device *dev); 116 void nsim_udp_tunnels_info_destroy(struct net_device *dev); 117 118 #ifdef CONFIG_BPF_SYSCALL 119 int nsim_bpf_dev_init(struct nsim_dev *nsim_dev); 120 void nsim_bpf_dev_exit(struct nsim_dev *nsim_dev); 121 int nsim_bpf_init(struct netdevsim *ns); 122 void nsim_bpf_uninit(struct netdevsim *ns); 123 int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf); 124 int nsim_bpf_disable_tc(struct netdevsim *ns); 125 int nsim_bpf_setup_tc_block_cb(enum tc_setup_type type, 126 void *type_data, void *cb_priv); 127 #else 128 129 static inline int nsim_bpf_dev_init(struct nsim_dev *nsim_dev) 130 { 131 return 0; 132 } 133 134 static inline void nsim_bpf_dev_exit(struct nsim_dev *nsim_dev) 135 { 136 } 137 static inline int nsim_bpf_init(struct netdevsim *ns) 138 { 139 return 0; 140 } 141 142 static inline void nsim_bpf_uninit(struct netdevsim *ns) 143 { 144 } 145 146 static inline int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf) 147 { 148 return -EOPNOTSUPP; 149 } 150 151 static inline int nsim_bpf_disable_tc(struct netdevsim *ns) 152 { 153 return 0; 154 } 155 156 static inline int 157 nsim_bpf_setup_tc_block_cb(enum tc_setup_type type, void *type_data, 158 void *cb_priv) 159 { 160 return -EOPNOTSUPP; 161 } 162 #endif 163 164 enum nsim_resource_id { 165 NSIM_RESOURCE_NONE, /* DEVLINK_RESOURCE_ID_PARENT_TOP */ 166 NSIM_RESOURCE_IPV4, 167 NSIM_RESOURCE_IPV4_FIB, 168 NSIM_RESOURCE_IPV4_FIB_RULES, 169 NSIM_RESOURCE_IPV6, 170 NSIM_RESOURCE_IPV6_FIB, 171 NSIM_RESOURCE_IPV6_FIB_RULES, 172 NSIM_RESOURCE_NEXTHOPS, 173 }; 174 175 struct nsim_dev_health { 176 struct devlink_health_reporter *empty_reporter; 177 struct devlink_health_reporter *dummy_reporter; 178 struct dentry *ddir; 179 char *recovered_break_msg; 180 u32 binary_len; 181 bool fail_recover; 182 }; 183 184 int nsim_dev_health_init(struct nsim_dev *nsim_dev, struct devlink *devlink); 185 void nsim_dev_health_exit(struct nsim_dev *nsim_dev); 186 187 #if IS_ENABLED(CONFIG_PSAMPLE) 188 int nsim_dev_psample_init(struct nsim_dev *nsim_dev); 189 void nsim_dev_psample_exit(struct nsim_dev *nsim_dev); 190 #else 191 static inline int nsim_dev_psample_init(struct nsim_dev *nsim_dev) 192 { 193 return 0; 194 } 195 196 static inline void nsim_dev_psample_exit(struct nsim_dev *nsim_dev) 197 { 198 } 199 #endif 200 201 enum nsim_dev_port_type { 202 NSIM_DEV_PORT_TYPE_PF, 203 NSIM_DEV_PORT_TYPE_VF, 204 }; 205 206 #define NSIM_DEV_VF_PORT_INDEX_BASE 128 207 #define NSIM_DEV_VF_PORT_INDEX_MAX UINT_MAX 208 209 struct nsim_dev_port { 210 struct list_head list; 211 struct devlink_port devlink_port; 212 unsigned int port_index; 213 enum nsim_dev_port_type port_type; 214 struct dentry *ddir; 215 struct dentry *rate_parent; 216 char *parent_name; 217 struct netdevsim *ns; 218 }; 219 220 struct nsim_dev { 221 struct nsim_bus_dev *nsim_bus_dev; 222 struct nsim_fib_data *fib_data; 223 struct nsim_trap_data *trap_data; 224 struct dentry *ddir; 225 struct dentry *ports_ddir; 226 struct dentry *take_snapshot; 227 struct dentry *max_vfs; 228 struct dentry *nodes_ddir; 229 struct bpf_offload_dev *bpf_dev; 230 bool bpf_bind_accept; 231 bool bpf_bind_verifier_accept; 232 u32 bpf_bind_verifier_delay; 233 struct dentry *ddir_bpf_bound_progs; 234 u32 prog_id_gen; 235 struct list_head bpf_bound_progs; 236 struct list_head bpf_bound_maps; 237 struct netdev_phys_item_id switch_id; 238 struct list_head port_list; 239 struct mutex port_list_lock; /* protects port list */ 240 bool fw_update_status; 241 u32 fw_update_overwrite_mask; 242 u32 max_macs; 243 bool test1; 244 bool dont_allow_reload; 245 bool fail_reload; 246 struct devlink_region *dummy_region; 247 struct nsim_dev_health health; 248 struct flow_action_cookie *fa_cookie; 249 spinlock_t fa_cookie_lock; /* protects fa_cookie */ 250 bool fail_trap_group_set; 251 bool fail_trap_policer_set; 252 bool fail_trap_policer_counter_get; 253 bool fail_trap_drop_counter_get; 254 struct { 255 struct udp_tunnel_nic_shared utn_shared; 256 u32 __ports[2][NSIM_UDP_TUNNEL_N_PORTS]; 257 bool sync_all; 258 bool open_only; 259 bool ipv4_only; 260 bool shared; 261 bool static_iana_vxlan; 262 u32 sleep; 263 } udp_ports; 264 struct nsim_dev_psample *psample; 265 u16 esw_mode; 266 }; 267 268 int nsim_esw_legacy_enable(struct nsim_dev *nsim_dev, struct netlink_ext_ack *extack); 269 int nsim_esw_switchdev_enable(struct nsim_dev *nsim_dev, struct netlink_ext_ack *extack); 270 271 static inline bool nsim_esw_mode_is_legacy(struct nsim_dev *nsim_dev) 272 { 273 return nsim_dev->esw_mode == DEVLINK_ESWITCH_MODE_LEGACY; 274 } 275 276 static inline bool nsim_esw_mode_is_switchdev(struct nsim_dev *nsim_dev) 277 { 278 return nsim_dev->esw_mode == DEVLINK_ESWITCH_MODE_SWITCHDEV; 279 } 280 281 static inline struct net *nsim_dev_net(struct nsim_dev *nsim_dev) 282 { 283 return devlink_net(priv_to_devlink(nsim_dev)); 284 } 285 286 int nsim_dev_init(void); 287 void nsim_dev_exit(void); 288 int nsim_dev_probe(struct nsim_bus_dev *nsim_bus_dev); 289 void nsim_dev_remove(struct nsim_bus_dev *nsim_bus_dev); 290 int nsim_dev_port_add(struct nsim_bus_dev *nsim_bus_dev, 291 enum nsim_dev_port_type type, 292 unsigned int port_index); 293 int nsim_dev_port_del(struct nsim_bus_dev *nsim_bus_dev, 294 enum nsim_dev_port_type type, 295 unsigned int port_index); 296 297 struct nsim_fib_data *nsim_fib_create(struct devlink *devlink, 298 struct netlink_ext_ack *extack); 299 void nsim_fib_destroy(struct devlink *devlink, struct nsim_fib_data *fib_data); 300 u64 nsim_fib_get_val(struct nsim_fib_data *fib_data, 301 enum nsim_resource_id res_id, bool max); 302 303 ssize_t nsim_bus_dev_max_vfs_read(struct file *file, 304 char __user *data, 305 size_t count, loff_t *ppos); 306 ssize_t nsim_bus_dev_max_vfs_write(struct file *file, 307 const char __user *data, 308 size_t count, loff_t *ppos); 309 void nsim_bus_dev_vfs_disable(struct nsim_bus_dev *nsim_bus_dev); 310 311 static inline bool nsim_dev_port_is_pf(struct nsim_dev_port *nsim_dev_port) 312 { 313 return nsim_dev_port->port_type == NSIM_DEV_PORT_TYPE_PF; 314 } 315 316 static inline bool nsim_dev_port_is_vf(struct nsim_dev_port *nsim_dev_port) 317 { 318 return nsim_dev_port->port_type == NSIM_DEV_PORT_TYPE_VF; 319 } 320 #if IS_ENABLED(CONFIG_XFRM_OFFLOAD) 321 void nsim_ipsec_init(struct netdevsim *ns); 322 void nsim_ipsec_teardown(struct netdevsim *ns); 323 bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb); 324 #else 325 static inline void nsim_ipsec_init(struct netdevsim *ns) 326 { 327 } 328 329 static inline void nsim_ipsec_teardown(struct netdevsim *ns) 330 { 331 } 332 333 static inline bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb) 334 { 335 return true; 336 } 337 #endif 338 339 struct nsim_vf_config { 340 int link_state; 341 u16 min_tx_rate; 342 u16 max_tx_rate; 343 u16 vlan; 344 __be16 vlan_proto; 345 u16 qos; 346 u8 vf_mac[ETH_ALEN]; 347 bool spoofchk_enabled; 348 bool trusted; 349 bool rss_query_enabled; 350 }; 351 352 struct nsim_bus_dev { 353 struct device dev; 354 struct list_head list; 355 unsigned int port_count; 356 unsigned int num_queues; /* Number of queues for each port on this bus */ 357 struct net *initial_net; /* Purpose of this is to carry net pointer 358 * during the probe time only. 359 */ 360 unsigned int max_vfs; 361 unsigned int num_vfs; 362 struct mutex vfs_lock; /* Protects vfconfigs */ 363 struct nsim_vf_config *vfconfigs; 364 /* Lock for devlink->reload_enabled in netdevsim module */ 365 struct mutex nsim_bus_reload_lock; 366 bool in_reload; 367 bool init; 368 }; 369 370 int nsim_bus_init(void); 371 void nsim_bus_exit(void); 372