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/xdp.h> 22 23 #define DRV_NAME "netdevsim" 24 25 #define NSIM_XDP_MAX_MTU 4000 26 27 #define NSIM_EA(extack, msg) NL_SET_ERR_MSG_MOD((extack), msg) 28 29 struct bpf_prog; 30 struct bpf_offload_dev; 31 struct dentry; 32 struct nsim_vf_config; 33 34 struct netdevsim_shared_dev { 35 unsigned int refcnt; 36 u32 switch_id; 37 38 struct dentry *ddir; 39 40 struct bpf_offload_dev *bpf_dev; 41 42 bool bpf_bind_accept; 43 u32 bpf_bind_verifier_delay; 44 45 struct dentry *ddir_bpf_bound_progs; 46 u32 prog_id_gen; 47 48 struct list_head bpf_bound_progs; 49 struct list_head bpf_bound_maps; 50 }; 51 52 struct netdevsim; 53 54 struct netdevsim_shared_dev *nsim_sdev_get(struct netdevsim *joinns); 55 void nsim_sdev_put(struct netdevsim_shared_dev *sdev); 56 int nsim_sdev_init(void); 57 void nsim_sdev_exit(void); 58 59 #define NSIM_IPSEC_MAX_SA_COUNT 33 60 #define NSIM_IPSEC_VALID BIT(31) 61 62 struct nsim_sa { 63 struct xfrm_state *xs; 64 __be32 ipaddr[4]; 65 u32 key[4]; 66 u32 salt; 67 bool used; 68 bool crypt; 69 bool rx; 70 }; 71 72 struct nsim_ipsec { 73 struct nsim_sa sa[NSIM_IPSEC_MAX_SA_COUNT]; 74 struct dentry *pfile; 75 u32 count; 76 u32 tx; 77 u32 ok; 78 }; 79 80 struct netdevsim { 81 struct net_device *netdev; 82 83 u64 tx_packets; 84 u64 tx_bytes; 85 struct u64_stats_sync syncp; 86 87 struct device dev; 88 struct netdevsim_shared_dev *sdev; 89 90 struct dentry *ddir; 91 92 unsigned int num_vfs; 93 struct nsim_vf_config *vfconfigs; 94 95 struct bpf_prog *bpf_offloaded; 96 u32 bpf_offloaded_id; 97 98 struct xdp_attachment_info xdp; 99 struct xdp_attachment_info xdp_hw; 100 101 bool bpf_tc_accept; 102 bool bpf_tc_non_bound_accept; 103 bool bpf_xdpdrv_accept; 104 bool bpf_xdpoffload_accept; 105 106 bool bpf_map_accept; 107 struct devlink *devlink; 108 struct nsim_ipsec ipsec; 109 }; 110 111 #ifdef CONFIG_BPF_SYSCALL 112 int nsim_bpf_init(struct netdevsim *ns); 113 void nsim_bpf_uninit(struct netdevsim *ns); 114 int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf); 115 int nsim_bpf_disable_tc(struct netdevsim *ns); 116 int nsim_bpf_setup_tc_block_cb(enum tc_setup_type type, 117 void *type_data, void *cb_priv); 118 #else 119 static inline int nsim_bpf_init(struct netdevsim *ns) 120 { 121 return 0; 122 } 123 124 static inline void nsim_bpf_uninit(struct netdevsim *ns) 125 { 126 } 127 128 static inline int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf) 129 { 130 return bpf->command == XDP_QUERY_PROG ? 0 : -EOPNOTSUPP; 131 } 132 133 static inline int nsim_bpf_disable_tc(struct netdevsim *ns) 134 { 135 return 0; 136 } 137 138 static inline int 139 nsim_bpf_setup_tc_block_cb(enum tc_setup_type type, void *type_data, 140 void *cb_priv) 141 { 142 return -EOPNOTSUPP; 143 } 144 #endif 145 146 enum nsim_resource_id { 147 NSIM_RESOURCE_NONE, /* DEVLINK_RESOURCE_ID_PARENT_TOP */ 148 NSIM_RESOURCE_IPV4, 149 NSIM_RESOURCE_IPV4_FIB, 150 NSIM_RESOURCE_IPV4_FIB_RULES, 151 NSIM_RESOURCE_IPV6, 152 NSIM_RESOURCE_IPV6_FIB, 153 NSIM_RESOURCE_IPV6_FIB_RULES, 154 }; 155 156 int nsim_devlink_setup(struct netdevsim *ns); 157 void nsim_devlink_teardown(struct netdevsim *ns); 158 159 int nsim_devlink_init(void); 160 void nsim_devlink_exit(void); 161 162 int nsim_fib_init(void); 163 void nsim_fib_exit(void); 164 u64 nsim_fib_get_val(struct net *net, enum nsim_resource_id res_id, bool max); 165 int nsim_fib_set_max(struct net *net, enum nsim_resource_id res_id, u64 val, 166 struct netlink_ext_ack *extack); 167 168 #if IS_ENABLED(CONFIG_XFRM_OFFLOAD) 169 void nsim_ipsec_init(struct netdevsim *ns); 170 void nsim_ipsec_teardown(struct netdevsim *ns); 171 bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb); 172 #else 173 static inline void nsim_ipsec_init(struct netdevsim *ns) 174 { 175 } 176 177 static inline void nsim_ipsec_teardown(struct netdevsim *ns) 178 { 179 } 180 181 static inline bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb) 182 { 183 return true; 184 } 185 #endif 186 187 static inline struct netdevsim *to_nsim(struct device *ptr) 188 { 189 return container_of(ptr, struct netdevsim, dev); 190 } 191