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 #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);