drivers/net/netdevsim/netdevsim.h

   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 void 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 #else
 131 static inline void nsim_devlink_setup(struct netdevsim *ns)
 132 {
 133 }
 134
 135 static inline void nsim_devlink_teardown(struct netdevsim *ns)
 136 {
 137 }
 138
 139 static inline int nsim_devlink_init(void)
 140 {
 141         return 0;
 142 }
 143
 144 static inline void nsim_devlink_exit(void)
 145 {
 146 }
 147 #endif
 148
 149 static inline struct netdevsim *to_nsim(struct device *ptr)
 150 {
 151         return container_of(ptr, struct netdevsim, dev);
 152 }