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 22 #define DRV_NAME "netdevsim" 23 24 #define NSIM_XDP_MAX_MTU 4000 25 26 #define NSIM_EA(extack, msg) NL_SET_ERR_MSG_MOD((extack), msg) 27 28 struct bpf_prog; 29 struct dentry; 30 struct nsim_vf_config; 31 32 struct netdevsim { 33 struct net_device *netdev; 34 35 u64 tx_packets; 36 u64 tx_bytes; 37 struct u64_stats_sync syncp; 38 39 struct device dev; 40 41 struct dentry *ddir; 42 43 unsigned int num_vfs; 44 struct nsim_vf_config *vfconfigs; 45 46 struct bpf_prog *bpf_offloaded; 47 u32 bpf_offloaded_id; 48 49 u32 xdp_flags; 50 int xdp_prog_mode; 51 struct bpf_prog *xdp_prog; 52 53 u32 prog_id_gen; 54 55 bool bpf_bind_accept; 56 u32 bpf_bind_verifier_delay; 57 struct dentry *ddir_bpf_bound_progs; 58 struct list_head bpf_bound_progs; 59 60 bool bpf_tc_accept; 61 bool bpf_tc_non_bound_accept; 62 bool bpf_xdpdrv_accept; 63 bool bpf_xdpoffload_accept; 64 65 bool bpf_map_accept; 66 struct list_head bpf_bound_maps; 67 #if IS_ENABLED(CONFIG_NET_DEVLINK) 68 struct devlink *devlink; 69 #endif 70 }; 71 72 extern struct dentry *nsim_ddir; 73 74 #ifdef CONFIG_BPF_SYSCALL 75 int nsim_bpf_init(struct netdevsim *ns); 76 void nsim_bpf_uninit(struct netdevsim *ns); 77 int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf); 78 int nsim_bpf_disable_tc(struct netdevsim *ns); 79 int nsim_bpf_setup_tc_block_cb(enum tc_setup_type type, 80 void *type_data, void *cb_priv); 81 #else 82 static inline int nsim_bpf_init(struct netdevsim *ns) 83 { 84 return 0; 85 } 86 87 static inline void nsim_bpf_uninit(struct netdevsim *ns) 88 { 89 } 90 91 static inline int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf) 92 { 93 return bpf->command == XDP_QUERY_PROG ? 0 : -EOPNOTSUPP; 94 } 95 96 static inline int nsim_bpf_disable_tc(struct netdevsim *ns) 97 { 98 return 0; 99 } 100 101 static inline int 102 nsim_bpf_setup_tc_block_cb(enum tc_setup_type type, void *type_data, 103 void *cb_priv) 104 { 105 return -EOPNOTSUPP; 106 } 107 #endif 108 109 #if IS_ENABLED(CONFIG_NET_DEVLINK) 110 enum nsim_resource_id { 111 NSIM_RESOURCE_NONE, /* DEVLINK_RESOURCE_ID_PARENT_TOP */ 112 NSIM_RESOURCE_IPV4, 113 NSIM_RESOURCE_IPV4_FIB, 114 NSIM_RESOURCE_IPV4_FIB_RULES, 115 NSIM_RESOURCE_IPV6, 116 NSIM_RESOURCE_IPV6_FIB, 117 NSIM_RESOURCE_IPV6_FIB_RULES, 118 }; 119 120 int nsim_devlink_setup(struct netdevsim *ns); 121 void nsim_devlink_teardown(struct netdevsim *ns); 122 123 int nsim_devlink_init(void); 124 void nsim_devlink_exit(void); 125 126 int nsim_fib_init(void); 127 void nsim_fib_exit(void); 128 u64 nsim_fib_get_val(struct net *net, enum nsim_resource_id res_id, bool max); 129 int nsim_fib_set_max(struct net *net, enum nsim_resource_id res_id, u64 val, 130 struct netlink_ext_ack *extack); 131 #else 132 static inline int nsim_devlink_setup(struct netdevsim *ns) 133 { 134 return 0; 135 } 136 137 static inline void nsim_devlink_teardown(struct netdevsim *ns) 138 { 139 } 140 141 static inline int nsim_devlink_init(void) 142 { 143 return 0; 144 } 145 146 static inline void nsim_devlink_exit(void) 147 { 148 } 149 #endif 150 151 static inline struct netdevsim *to_nsim(struct device *ptr) 152 { 153 return container_of(ptr, struct netdevsim, dev); 154 } 155