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_port { 138 struct list_head list; 139 struct devlink_port devlink_port; 140 unsigned int port_index; 141 struct dentry *ddir; 142 struct netdevsim *ns; 143 }; 144 145 struct nsim_dev { 146 struct nsim_bus_dev *nsim_bus_dev; 147 struct nsim_fib_data *fib_data; 148 struct nsim_trap_data *trap_data; 149 struct dentry *ddir; 150 struct dentry *ports_ddir; 151 struct bpf_offload_dev *bpf_dev; 152 bool bpf_bind_accept; 153 u32 bpf_bind_verifier_delay; 154 struct dentry *ddir_bpf_bound_progs; 155 u32 prog_id_gen; 156 struct list_head bpf_bound_progs; 157 struct list_head bpf_bound_maps; 158 struct netdev_phys_item_id switch_id; 159 struct list_head port_list; 160 struct mutex port_list_lock; /* protects port list */ 161 bool fw_update_status; 162 u32 max_macs; 163 bool test1; 164 struct devlink_region *dummy_region; 165 }; 166 167 int nsim_dev_init(void); 168 void nsim_dev_exit(void); 169 int nsim_dev_probe(struct nsim_bus_dev *nsim_bus_dev); 170 void nsim_dev_remove(struct nsim_bus_dev *nsim_bus_dev); 171 int nsim_dev_port_add(struct nsim_bus_dev *nsim_bus_dev, 172 unsigned int port_index); 173 int nsim_dev_port_del(struct nsim_bus_dev *nsim_bus_dev, 174 unsigned int port_index); 175 176 int nsim_fib_init(void); 177 void nsim_fib_exit(void); 178 u64 nsim_fib_get_val(struct net *net, enum nsim_resource_id res_id, bool max); 179 int nsim_fib_set_max(struct net *net, enum nsim_resource_id res_id, u64 val, 180 struct netlink_ext_ack *extack); 181 182 #if IS_ENABLED(CONFIG_XFRM_OFFLOAD) 183 void nsim_ipsec_init(struct netdevsim *ns); 184 void nsim_ipsec_teardown(struct netdevsim *ns); 185 bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb); 186 #else 187 static inline void nsim_ipsec_init(struct netdevsim *ns) 188 { 189 } 190 191 static inline void nsim_ipsec_teardown(struct netdevsim *ns) 192 { 193 } 194 195 static inline bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb) 196 { 197 return true; 198 } 199 #endif 200 201 struct nsim_vf_config { 202 int link_state; 203 u16 min_tx_rate; 204 u16 max_tx_rate; 205 u16 vlan; 206 __be16 vlan_proto; 207 u16 qos; 208 u8 vf_mac[ETH_ALEN]; 209 bool spoofchk_enabled; 210 bool trusted; 211 bool rss_query_enabled; 212 }; 213 214 struct nsim_bus_dev { 215 struct device dev; 216 struct list_head list; 217 unsigned int port_count; 218 unsigned int num_vfs; 219 struct nsim_vf_config *vfconfigs; 220 }; 221 222 int nsim_bus_init(void); 223 void nsim_bus_exit(void); 224