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/kernel.h> 19 #include <linux/list.h> 20 #include <linux/netdevice.h> 21 #include <linux/u64_stats_sync.h> 22 #include <net/devlink.h> 23 #include <net/udp_tunnel.h> 24 #include <net/xdp.h> 25 26 #define DRV_NAME "netdevsim" 27 28 #define NSIM_XDP_MAX_MTU 4000 29 30 #define NSIM_EA(extack, msg) NL_SET_ERR_MSG_MOD((extack), msg) 31 32 #define NSIM_IPSEC_MAX_SA_COUNT 33 33 #define NSIM_IPSEC_VALID BIT(31) 34 #define NSIM_UDP_TUNNEL_N_PORTS 4 35 36 struct nsim_sa { 37 struct xfrm_state *xs; 38 __be32 ipaddr[4]; 39 u32 key[4]; 40 u32 salt; 41 bool used; 42 bool crypt; 43 bool rx; 44 }; 45 46 struct nsim_ipsec { 47 struct nsim_sa sa[NSIM_IPSEC_MAX_SA_COUNT]; 48 struct dentry *pfile; 49 u32 count; 50 u32 tx; 51 u32 ok; 52 }; 53 54 struct nsim_ethtool { 55 bool rx; 56 bool tx; 57 bool report_stats_rx; 58 bool report_stats_tx; 59 }; 60 61 struct netdevsim { 62 struct net_device *netdev; 63 struct nsim_dev *nsim_dev; 64 struct nsim_dev_port *nsim_dev_port; 65 66 u64 tx_packets; 67 u64 tx_bytes; 68 struct u64_stats_sync syncp; 69 70 struct nsim_bus_dev *nsim_bus_dev; 71 72 struct bpf_prog *bpf_offloaded; 73 u32 bpf_offloaded_id; 74 75 struct xdp_attachment_info xdp; 76 struct xdp_attachment_info xdp_hw; 77 78 bool bpf_tc_accept; 79 bool bpf_tc_non_bound_accept; 80 bool bpf_xdpdrv_accept; 81 bool bpf_xdpoffload_accept; 82 83 bool bpf_map_accept; 84 struct nsim_ipsec ipsec; 85 struct { 86 u32 inject_error; 87 u32 sleep; 88 u32 __ports[2][NSIM_UDP_TUNNEL_N_PORTS]; 89 u32 (*ports)[NSIM_UDP_TUNNEL_N_PORTS]; 90 struct debugfs_u32_array dfs_ports[2]; 91 } udp_ports; 92 93 struct nsim_ethtool ethtool; 94 }; 95 96 struct netdevsim * 97 nsim_create(struct nsim_dev *nsim_dev, struct nsim_dev_port *nsim_dev_port); 98 void nsim_destroy(struct netdevsim *ns); 99 100 void nsim_ethtool_init(struct netdevsim *ns); 101 102 void nsim_udp_tunnels_debugfs_create(struct nsim_dev *nsim_dev); 103 int nsim_udp_tunnels_info_create(struct nsim_dev *nsim_dev, 104 struct net_device *dev); 105 void nsim_udp_tunnels_info_destroy(struct net_device *dev); 106 107 #ifdef CONFIG_BPF_SYSCALL 108 int nsim_bpf_dev_init(struct nsim_dev *nsim_dev); 109 void nsim_bpf_dev_exit(struct nsim_dev *nsim_dev); 110 int nsim_bpf_init(struct netdevsim *ns); 111 void nsim_bpf_uninit(struct netdevsim *ns); 112 int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf); 113 int nsim_bpf_disable_tc(struct netdevsim *ns); 114 int nsim_bpf_setup_tc_block_cb(enum tc_setup_type type, 115 void *type_data, void *cb_priv); 116 #else 117 118 static inline int nsim_bpf_dev_init(struct nsim_dev *nsim_dev) 119 { 120 return 0; 121 } 122 123 static inline void nsim_bpf_dev_exit(struct nsim_dev *nsim_dev) 124 { 125 } 126 static inline int nsim_bpf_init(struct netdevsim *ns) 127 { 128 return 0; 129 } 130 131 static inline void nsim_bpf_uninit(struct netdevsim *ns) 132 { 133 } 134 135 static inline int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf) 136 { 137 return -EOPNOTSUPP; 138 } 139 140 static inline int nsim_bpf_disable_tc(struct netdevsim *ns) 141 { 142 return 0; 143 } 144 145 static inline int 146 nsim_bpf_setup_tc_block_cb(enum tc_setup_type type, void *type_data, 147 void *cb_priv) 148 { 149 return -EOPNOTSUPP; 150 } 151 #endif 152 153 enum nsim_resource_id { 154 NSIM_RESOURCE_NONE, /* DEVLINK_RESOURCE_ID_PARENT_TOP */ 155 NSIM_RESOURCE_IPV4, 156 NSIM_RESOURCE_IPV4_FIB, 157 NSIM_RESOURCE_IPV4_FIB_RULES, 158 NSIM_RESOURCE_IPV6, 159 NSIM_RESOURCE_IPV6_FIB, 160 NSIM_RESOURCE_IPV6_FIB_RULES, 161 NSIM_RESOURCE_NEXTHOPS, 162 }; 163 164 struct nsim_dev_health { 165 struct devlink_health_reporter *empty_reporter; 166 struct devlink_health_reporter *dummy_reporter; 167 struct dentry *ddir; 168 char *recovered_break_msg; 169 u32 binary_len; 170 bool fail_recover; 171 }; 172 173 int nsim_dev_health_init(struct nsim_dev *nsim_dev, struct devlink *devlink); 174 void nsim_dev_health_exit(struct nsim_dev *nsim_dev); 175 176 struct nsim_dev_port { 177 struct list_head list; 178 struct devlink_port devlink_port; 179 unsigned int port_index; 180 struct dentry *ddir; 181 struct netdevsim *ns; 182 }; 183 184 struct nsim_dev { 185 struct nsim_bus_dev *nsim_bus_dev; 186 struct nsim_fib_data *fib_data; 187 struct nsim_trap_data *trap_data; 188 struct dentry *ddir; 189 struct dentry *ports_ddir; 190 struct dentry *take_snapshot; 191 struct bpf_offload_dev *bpf_dev; 192 bool bpf_bind_accept; 193 u32 bpf_bind_verifier_delay; 194 struct dentry *ddir_bpf_bound_progs; 195 u32 prog_id_gen; 196 struct list_head bpf_bound_progs; 197 struct list_head bpf_bound_maps; 198 struct netdev_phys_item_id switch_id; 199 struct list_head port_list; 200 struct mutex port_list_lock; /* protects port list */ 201 bool fw_update_status; 202 u32 fw_update_overwrite_mask; 203 u32 max_macs; 204 bool test1; 205 bool dont_allow_reload; 206 bool fail_reload; 207 struct devlink_region *dummy_region; 208 struct nsim_dev_health health; 209 struct flow_action_cookie *fa_cookie; 210 spinlock_t fa_cookie_lock; /* protects fa_cookie */ 211 bool fail_trap_group_set; 212 bool fail_trap_policer_set; 213 bool fail_trap_policer_counter_get; 214 struct { 215 struct udp_tunnel_nic_shared utn_shared; 216 u32 __ports[2][NSIM_UDP_TUNNEL_N_PORTS]; 217 bool sync_all; 218 bool open_only; 219 bool ipv4_only; 220 bool shared; 221 bool static_iana_vxlan; 222 u32 sleep; 223 } udp_ports; 224 }; 225 226 static inline struct net *nsim_dev_net(struct nsim_dev *nsim_dev) 227 { 228 return devlink_net(priv_to_devlink(nsim_dev)); 229 } 230 231 int nsim_dev_init(void); 232 void nsim_dev_exit(void); 233 int nsim_dev_probe(struct nsim_bus_dev *nsim_bus_dev); 234 void nsim_dev_remove(struct nsim_bus_dev *nsim_bus_dev); 235 int nsim_dev_port_add(struct nsim_bus_dev *nsim_bus_dev, 236 unsigned int port_index); 237 int nsim_dev_port_del(struct nsim_bus_dev *nsim_bus_dev, 238 unsigned int port_index); 239 240 struct nsim_fib_data *nsim_fib_create(struct devlink *devlink, 241 struct netlink_ext_ack *extack); 242 void nsim_fib_destroy(struct devlink *devlink, struct nsim_fib_data *fib_data); 243 u64 nsim_fib_get_val(struct nsim_fib_data *fib_data, 244 enum nsim_resource_id res_id, bool max); 245 246 #if IS_ENABLED(CONFIG_XFRM_OFFLOAD) 247 void nsim_ipsec_init(struct netdevsim *ns); 248 void nsim_ipsec_teardown(struct netdevsim *ns); 249 bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb); 250 #else 251 static inline void nsim_ipsec_init(struct netdevsim *ns) 252 { 253 } 254 255 static inline void nsim_ipsec_teardown(struct netdevsim *ns) 256 { 257 } 258 259 static inline bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb) 260 { 261 return true; 262 } 263 #endif 264 265 struct nsim_vf_config { 266 int link_state; 267 u16 min_tx_rate; 268 u16 max_tx_rate; 269 u16 vlan; 270 __be16 vlan_proto; 271 u16 qos; 272 u8 vf_mac[ETH_ALEN]; 273 bool spoofchk_enabled; 274 bool trusted; 275 bool rss_query_enabled; 276 }; 277 278 struct nsim_bus_dev { 279 struct device dev; 280 struct list_head list; 281 unsigned int port_count; 282 struct net *initial_net; /* Purpose of this is to carry net pointer 283 * during the probe time only. 284 */ 285 unsigned int num_vfs; 286 struct nsim_vf_config *vfconfigs; 287 /* Lock for devlink->reload_enabled in netdevsim module */ 288 struct mutex nsim_bus_reload_lock; 289 bool init; 290 }; 291 292 int nsim_bus_init(void); 293 void nsim_bus_exit(void); 294