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 }; 162 163 struct nsim_dev_health { 164 struct devlink_health_reporter *empty_reporter; 165 struct devlink_health_reporter *dummy_reporter; 166 struct dentry *ddir; 167 char *recovered_break_msg; 168 u32 binary_len; 169 bool fail_recover; 170 }; 171 172 int nsim_dev_health_init(struct nsim_dev *nsim_dev, struct devlink *devlink); 173 void nsim_dev_health_exit(struct nsim_dev *nsim_dev); 174 175 struct nsim_dev_port { 176 struct list_head list; 177 struct devlink_port devlink_port; 178 unsigned int port_index; 179 struct dentry *ddir; 180 struct netdevsim *ns; 181 }; 182 183 struct nsim_dev { 184 struct nsim_bus_dev *nsim_bus_dev; 185 struct nsim_fib_data *fib_data; 186 struct nsim_trap_data *trap_data; 187 struct dentry *ddir; 188 struct dentry *ports_ddir; 189 struct dentry *take_snapshot; 190 struct bpf_offload_dev *bpf_dev; 191 bool bpf_bind_accept; 192 u32 bpf_bind_verifier_delay; 193 struct dentry *ddir_bpf_bound_progs; 194 u32 prog_id_gen; 195 struct list_head bpf_bound_progs; 196 struct list_head bpf_bound_maps; 197 struct netdev_phys_item_id switch_id; 198 struct list_head port_list; 199 struct mutex port_list_lock; /* protects port list */ 200 bool fw_update_status; 201 u32 fw_update_overwrite_mask; 202 u32 max_macs; 203 bool test1; 204 bool dont_allow_reload; 205 bool fail_reload; 206 struct devlink_region *dummy_region; 207 struct nsim_dev_health health; 208 struct flow_action_cookie *fa_cookie; 209 spinlock_t fa_cookie_lock; /* protects fa_cookie */ 210 bool fail_trap_group_set; 211 bool fail_trap_policer_set; 212 bool fail_trap_policer_counter_get; 213 struct { 214 struct udp_tunnel_nic_shared utn_shared; 215 u32 __ports[2][NSIM_UDP_TUNNEL_N_PORTS]; 216 bool sync_all; 217 bool open_only; 218 bool ipv4_only; 219 bool shared; 220 bool static_iana_vxlan; 221 u32 sleep; 222 } udp_ports; 223 }; 224 225 static inline struct net *nsim_dev_net(struct nsim_dev *nsim_dev) 226 { 227 return devlink_net(priv_to_devlink(nsim_dev)); 228 } 229 230 int nsim_dev_init(void); 231 void nsim_dev_exit(void); 232 int nsim_dev_probe(struct nsim_bus_dev *nsim_bus_dev); 233 void nsim_dev_remove(struct nsim_bus_dev *nsim_bus_dev); 234 int nsim_dev_port_add(struct nsim_bus_dev *nsim_bus_dev, 235 unsigned int port_index); 236 int nsim_dev_port_del(struct nsim_bus_dev *nsim_bus_dev, 237 unsigned int port_index); 238 239 struct nsim_fib_data *nsim_fib_create(struct devlink *devlink, 240 struct netlink_ext_ack *extack); 241 void nsim_fib_destroy(struct devlink *devlink, struct nsim_fib_data *fib_data); 242 u64 nsim_fib_get_val(struct nsim_fib_data *fib_data, 243 enum nsim_resource_id res_id, bool max); 244 245 #if IS_ENABLED(CONFIG_XFRM_OFFLOAD) 246 void nsim_ipsec_init(struct netdevsim *ns); 247 void nsim_ipsec_teardown(struct netdevsim *ns); 248 bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb); 249 #else 250 static inline void nsim_ipsec_init(struct netdevsim *ns) 251 { 252 } 253 254 static inline void nsim_ipsec_teardown(struct netdevsim *ns) 255 { 256 } 257 258 static inline bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb) 259 { 260 return true; 261 } 262 #endif 263 264 struct nsim_vf_config { 265 int link_state; 266 u16 min_tx_rate; 267 u16 max_tx_rate; 268 u16 vlan; 269 __be16 vlan_proto; 270 u16 qos; 271 u8 vf_mac[ETH_ALEN]; 272 bool spoofchk_enabled; 273 bool trusted; 274 bool rss_query_enabled; 275 }; 276 277 struct nsim_bus_dev { 278 struct device dev; 279 struct list_head list; 280 unsigned int port_count; 281 struct net *initial_net; /* Purpose of this is to carry net pointer 282 * during the probe time only. 283 */ 284 unsigned int num_vfs; 285 struct nsim_vf_config *vfconfigs; 286 /* Lock for devlink->reload_enabled in netdevsim module */ 287 struct mutex nsim_bus_reload_lock; 288 bool init; 289 }; 290 291 int nsim_bus_init(void); 292 void nsim_bus_exit(void); 293