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