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/device.h> 17 #include <linux/kernel.h> 18 #include <linux/list.h> 19 #include <linux/netdevice.h> 20 #include <linux/u64_stats_sync.h> 21 #include <net/devlink.h> 22 #include <net/xdp.h> 23 24 #define DRV_NAME "netdevsim" 25 26 #define NSIM_XDP_MAX_MTU 4000 27 28 #define NSIM_EA(extack, msg) NL_SET_ERR_MSG_MOD((extack), msg) 29 30 #define NSIM_IPSEC_MAX_SA_COUNT 33 31 #define NSIM_IPSEC_VALID BIT(31) 32 33 struct nsim_sa { 34 struct xfrm_state *xs; 35 __be32 ipaddr[4]; 36 u32 key[4]; 37 u32 salt; 38 bool used; 39 bool crypt; 40 bool rx; 41 }; 42 43 struct nsim_ipsec { 44 struct nsim_sa sa[NSIM_IPSEC_MAX_SA_COUNT]; 45 struct dentry *pfile; 46 u32 count; 47 u32 tx; 48 u32 ok; 49 }; 50 51 struct netdevsim { 52 struct net_device *netdev; 53 struct nsim_dev *nsim_dev; 54 struct nsim_dev_port *nsim_dev_port; 55 56 u64 tx_packets; 57 u64 tx_bytes; 58 struct u64_stats_sync syncp; 59 60 struct nsim_bus_dev *nsim_bus_dev; 61 62 struct bpf_prog *bpf_offloaded; 63 u32 bpf_offloaded_id; 64 65 struct xdp_attachment_info xdp; 66 struct xdp_attachment_info xdp_hw; 67 68 bool bpf_tc_accept; 69 bool bpf_tc_non_bound_accept; 70 bool bpf_xdpdrv_accept; 71 bool bpf_xdpoffload_accept; 72 73 bool bpf_map_accept; 74 struct nsim_ipsec ipsec; 75 }; 76 77 struct netdevsim * 78 nsim_create(struct nsim_dev *nsim_dev, struct nsim_dev_port *nsim_dev_port); 79 void nsim_destroy(struct netdevsim *ns); 80 81 #ifdef CONFIG_BPF_SYSCALL 82 int nsim_bpf_dev_init(struct nsim_dev *nsim_dev); 83 void nsim_bpf_dev_exit(struct nsim_dev *nsim_dev); 84 int nsim_bpf_init(struct netdevsim *ns); 85 void nsim_bpf_uninit(struct netdevsim *ns); 86 int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf); 87 int nsim_bpf_disable_tc(struct netdevsim *ns); 88 int nsim_bpf_setup_tc_block_cb(enum tc_setup_type type, 89 void *type_data, void *cb_priv); 90 #else 91 92 static inline int nsim_bpf_dev_init(struct nsim_dev *nsim_dev) 93 { 94 return 0; 95 } 96 97 static inline void nsim_bpf_dev_exit(struct nsim_dev *nsim_dev) 98 { 99 } 100 static inline int nsim_bpf_init(struct netdevsim *ns) 101 { 102 return 0; 103 } 104 105 static inline void nsim_bpf_uninit(struct netdevsim *ns) 106 { 107 } 108 109 static inline int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf) 110 { 111 return bpf->command == XDP_QUERY_PROG ? 0 : -EOPNOTSUPP; 112 } 113 114 static inline int nsim_bpf_disable_tc(struct netdevsim *ns) 115 { 116 return 0; 117 } 118 119 static inline int 120 nsim_bpf_setup_tc_block_cb(enum tc_setup_type type, void *type_data, 121 void *cb_priv) 122 { 123 return -EOPNOTSUPP; 124 } 125 #endif 126 127 enum nsim_resource_id { 128 NSIM_RESOURCE_NONE, /* DEVLINK_RESOURCE_ID_PARENT_TOP */ 129 NSIM_RESOURCE_IPV4, 130 NSIM_RESOURCE_IPV4_FIB, 131 NSIM_RESOURCE_IPV4_FIB_RULES, 132 NSIM_RESOURCE_IPV6, 133 NSIM_RESOURCE_IPV6_FIB, 134 NSIM_RESOURCE_IPV6_FIB_RULES, 135 }; 136 137 struct nsim_dev_health { 138 struct devlink_health_reporter *empty_reporter; 139 struct devlink_health_reporter *dummy_reporter; 140 struct dentry *ddir; 141 char *recovered_break_msg; 142 u32 binary_len; 143 bool fail_recover; 144 }; 145 146 int nsim_dev_health_init(struct nsim_dev *nsim_dev, struct devlink *devlink); 147 void nsim_dev_health_exit(struct nsim_dev *nsim_dev); 148 149 struct nsim_dev_port { 150 struct list_head list; 151 struct devlink_port devlink_port; 152 unsigned int port_index; 153 struct dentry *ddir; 154 struct netdevsim *ns; 155 }; 156 157 struct nsim_dev { 158 struct nsim_bus_dev *nsim_bus_dev; 159 struct nsim_fib_data *fib_data; 160 struct nsim_trap_data *trap_data; 161 struct dentry *ddir; 162 struct dentry *ports_ddir; 163 struct dentry *take_snapshot; 164 struct bpf_offload_dev *bpf_dev; 165 bool bpf_bind_accept; 166 u32 bpf_bind_verifier_delay; 167 struct dentry *ddir_bpf_bound_progs; 168 u32 prog_id_gen; 169 struct list_head bpf_bound_progs; 170 struct list_head bpf_bound_maps; 171 struct netdev_phys_item_id switch_id; 172 struct list_head port_list; 173 struct mutex port_list_lock; /* protects port list */ 174 bool fw_update_status; 175 u32 max_macs; 176 bool test1; 177 bool dont_allow_reload; 178 bool fail_reload; 179 struct devlink_region *dummy_region; 180 struct nsim_dev_health health; 181 struct flow_action_cookie *fa_cookie; 182 spinlock_t fa_cookie_lock; /* protects fa_cookie */ 183 bool fail_trap_group_set; 184 bool fail_trap_policer_set; 185 bool fail_trap_policer_counter_get; 186 }; 187 188 static inline struct net *nsim_dev_net(struct nsim_dev *nsim_dev) 189 { 190 return devlink_net(priv_to_devlink(nsim_dev)); 191 } 192 193 int nsim_dev_init(void); 194 void nsim_dev_exit(void); 195 int nsim_dev_probe(struct nsim_bus_dev *nsim_bus_dev); 196 void nsim_dev_remove(struct nsim_bus_dev *nsim_bus_dev); 197 int nsim_dev_port_add(struct nsim_bus_dev *nsim_bus_dev, 198 unsigned int port_index); 199 int nsim_dev_port_del(struct nsim_bus_dev *nsim_bus_dev, 200 unsigned int port_index); 201 202 struct nsim_fib_data *nsim_fib_create(struct devlink *devlink, 203 struct netlink_ext_ack *extack); 204 void nsim_fib_destroy(struct devlink *devlink, struct nsim_fib_data *fib_data); 205 u64 nsim_fib_get_val(struct nsim_fib_data *fib_data, 206 enum nsim_resource_id res_id, bool max); 207 208 #if IS_ENABLED(CONFIG_XFRM_OFFLOAD) 209 void nsim_ipsec_init(struct netdevsim *ns); 210 void nsim_ipsec_teardown(struct netdevsim *ns); 211 bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb); 212 #else 213 static inline void nsim_ipsec_init(struct netdevsim *ns) 214 { 215 } 216 217 static inline void nsim_ipsec_teardown(struct netdevsim *ns) 218 { 219 } 220 221 static inline bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb) 222 { 223 return true; 224 } 225 #endif 226 227 struct nsim_vf_config { 228 int link_state; 229 u16 min_tx_rate; 230 u16 max_tx_rate; 231 u16 vlan; 232 __be16 vlan_proto; 233 u16 qos; 234 u8 vf_mac[ETH_ALEN]; 235 bool spoofchk_enabled; 236 bool trusted; 237 bool rss_query_enabled; 238 }; 239 240 struct nsim_bus_dev { 241 struct device dev; 242 struct list_head list; 243 unsigned int port_count; 244 struct net *initial_net; /* Purpose of this is to carry net pointer 245 * during the probe time only. 246 */ 247 unsigned int num_vfs; 248 struct nsim_vf_config *vfconfigs; 249 /* Lock for devlink->reload_enabled in netdevsim module */ 250 struct mutex nsim_bus_reload_lock; 251 bool init; 252 }; 253 254 int nsim_bus_init(void); 255 void nsim_bus_exit(void); 256