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