net/8021q/vlan.h

   1 #ifndef __BEN_VLAN_802_1Q_INC__
   2 #define __BEN_VLAN_802_1Q_INC__
   3
   4 #include <linux/if_vlan.h>
   5 #include <linux/u64_stats_sync.h>
   6 #include <linux/list.h>
   7
   8
   9 /**
  10  *      struct vlan_priority_tci_mapping - vlan egress priority mappings
  11  *      @priority: skb priority
  12  *      @vlan_qos: vlan priority: (skb->priority << 13) & 0xE000
  13  *      @next: pointer to next struct
  14  */
  15 struct vlan_priority_tci_mapping {
  16         u32                                     priority;
  17         u16                                     vlan_qos;
  18         struct vlan_priority_tci_mapping        *next;
  19 };
  20
  21
  22 /**
  23  *      struct vlan_pcpu_stats - VLAN percpu rx/tx stats
  24  *      @rx_packets: number of received packets
  25  *      @rx_bytes: number of received bytes
  26  *      @rx_multicast: number of received multicast packets
  27  *      @tx_packets: number of transmitted packets
  28  *      @tx_bytes: number of transmitted bytes
  29  *      @syncp: synchronization point for 64bit counters
  30  *      @rx_errors: number of rx errors
  31  *      @tx_dropped: number of tx drops
  32  */
  33 struct vlan_pcpu_stats {
  34         u64                     rx_packets;
  35         u64                     rx_bytes;
  36         u64                     rx_multicast;
  37         u64                     tx_packets;
  38         u64                     tx_bytes;
  39         struct u64_stats_sync   syncp;
  40         u32                     rx_errors;
  41         u32                     tx_dropped;
  42 };
  43
  44 struct netpoll;
  45
  46 /**
  47  *      struct vlan_dev_priv - VLAN private device data
  48  *      @nr_ingress_mappings: number of ingress priority mappings
  49  *      @ingress_priority_map: ingress priority mappings
  50  *      @nr_egress_mappings: number of egress priority mappings
  51  *      @egress_priority_map: hash of egress priority mappings
  52  *      @vlan_proto: VLAN encapsulation protocol
  53  *      @vlan_id: VLAN identifier
  54  *      @flags: device flags
  55  *      @real_dev: underlying netdevice
  56  *      @real_dev_addr: address of underlying netdevice
  57  *      @dent: proc dir entry
  58  *      @vlan_pcpu_stats: ptr to percpu rx stats
  59  */
  60 struct vlan_dev_priv {
  61         unsigned int                            nr_ingress_mappings;
  62         u32                                     ingress_priority_map[8];
  63         unsigned int                            nr_egress_mappings;
  64         struct vlan_priority_tci_mapping        *egress_priority_map[16];
  65
  66         __be16                                  vlan_proto;
  67         u16                                     vlan_id;
  68         u16                                     flags;
  69
  70         struct net_device                       *real_dev;
  71         unsigned char                           real_dev_addr[ETH_ALEN];
  72
  73         struct proc_dir_entry                   *dent;
  74         struct vlan_pcpu_stats __percpu         *vlan_pcpu_stats;
  75 #ifdef CONFIG_NET_POLL_CONTROLLER
  76         struct netpoll                          *netpoll;
  77 #endif
  78 };
  79
  80 static inline struct vlan_dev_priv *vlan_dev_priv(const struct net_device *dev)
  81 {
  82         return netdev_priv(dev);
  83 }
  84
  85 /* if this changes, algorithm will have to be reworked because this
  86  * depends on completely exhausting the VLAN identifier space.  Thus
  87  * it gives constant time look-up, but in many cases it wastes memory.
  88  */
  89 #define VLAN_GROUP_ARRAY_SPLIT_PARTS  8
  90 #define VLAN_GROUP_ARRAY_PART_LEN     (VLAN_N_VID/VLAN_GROUP_ARRAY_SPLIT_PARTS)
  91
  92 enum vlan_protos {
  93         VLAN_PROTO_8021Q        = 0,
  94         VLAN_PROTO_8021AD,
  95         VLAN_PROTO_NUM,
  96 };
  97
  98 struct vlan_group {
  99         unsigned int            nr_vlan_devs;
 100         struct hlist_node       hlist;  /* linked list */
 101         struct net_device **vlan_devices_arrays[VLAN_PROTO_NUM]
 102                                                [VLAN_GROUP_ARRAY_SPLIT_PARTS];
 103 };
 104
 105 struct vlan_info {
 106         struct net_device       *real_dev; /* The ethernet(like) device
 107                                             * the vlan is attached to.
 108                                             */
 109         struct vlan_group       grp;
 110         struct list_head        vid_list;
 111         unsigned int            nr_vids;
 112         struct rcu_head         rcu;
 113 };
 114
 115 static inline unsigned int vlan_proto_idx(__be16 proto)
 116 {
 117         switch (proto) {
 118         case __constant_htons(ETH_P_8021Q):
 119                 return VLAN_PROTO_8021Q;
 120         case __constant_htons(ETH_P_8021AD):
 121                 return VLAN_PROTO_8021AD;
 122         default:
 123                 BUG();
 124                 return 0;
 125         }
 126 }
 127
 128 static inline struct net_device *__vlan_group_get_device(struct vlan_group *vg,
 129                                                          unsigned int pidx,
 130                                                          u16 vlan_id)
 131 {
 132         struct net_device **array;
 133
 134         array = vg->vlan_devices_arrays[pidx]
 135                                        [vlan_id / VLAN_GROUP_ARRAY_PART_LEN];
 136         return array ? array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN] : NULL;
 137 }
 138
 139 static inline struct net_device *vlan_group_get_device(struct vlan_group *vg,
 140                                                        __be16 vlan_proto,
 141                                                        u16 vlan_id)
 142 {
 143         return __vlan_group_get_device(vg, vlan_proto_idx(vlan_proto), vlan_id);
 144 }
 145
 146 static inline void vlan_group_set_device(struct vlan_group *vg,
 147                                          __be16 vlan_proto, u16 vlan_id,
 148                                          struct net_device *dev)
 149 {
 150         struct net_device **array;
 151         if (!vg)
 152                 return;
 153         array = vg->vlan_devices_arrays[vlan_proto_idx(vlan_proto)]
 154                                        [vlan_id / VLAN_GROUP_ARRAY_PART_LEN];
 155         array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN] = dev;
 156 }
 157
 158 /* Must be invoked with rcu_read_lock or with RTNL. */
 159 static inline struct net_device *vlan_find_dev(struct net_device *real_dev,
 160                                                __be16 vlan_proto, u16 vlan_id)
 161 {
 162         struct vlan_info *vlan_info = rcu_dereference_rtnl(real_dev->vlan_info);
 163
 164         if (vlan_info)
 165                 return vlan_group_get_device(&vlan_info->grp,
 166                                              vlan_proto, vlan_id);
 167
 168         return NULL;
 169 }
 170
 171 #define vlan_group_for_each_dev(grp, i, dev) \
 172         for ((i) = 0; i < VLAN_PROTO_NUM * VLAN_N_VID; i++) \
 173                 if (((dev) = __vlan_group_get_device((grp), (i) / VLAN_N_VID, \
 174                                                             (i) % VLAN_N_VID)))
 175
 176 /* found in vlan_dev.c */
 177 void vlan_dev_set_ingress_priority(const struct net_device *dev,
 178                                    u32 skb_prio, u16 vlan_prio);
 179 int vlan_dev_set_egress_priority(const struct net_device *dev,
 180                                  u32 skb_prio, u16 vlan_prio);
 181 int vlan_dev_change_flags(const struct net_device *dev, u32 flag, u32 mask);
 182 void vlan_dev_get_realdev_name(const struct net_device *dev, char *result);
 183
 184 int vlan_check_real_dev(struct net_device *real_dev,
 185                         __be16 protocol, u16 vlan_id);
 186 void vlan_setup(struct net_device *dev);
 187 int register_vlan_dev(struct net_device *dev);
 188 void unregister_vlan_dev(struct net_device *dev, struct list_head *head);
 189
 190 static inline u32 vlan_get_ingress_priority(struct net_device *dev,
 191                                             u16 vlan_tci)
 192 {
 193         struct vlan_dev_priv *vip = vlan_dev_priv(dev);
 194
 195         return vip->ingress_priority_map[(vlan_tci >> VLAN_PRIO_SHIFT) & 0x7];
 196 }
 197
 198 #ifdef CONFIG_VLAN_8021Q_GVRP
 199 int vlan_gvrp_request_join(const struct net_device *dev);
 200 void vlan_gvrp_request_leave(const struct net_device *dev);
 201 int vlan_gvrp_init_applicant(struct net_device *dev);
 202 void vlan_gvrp_uninit_applicant(struct net_device *dev);
 203 int vlan_gvrp_init(void);
 204 void vlan_gvrp_uninit(void);
 205 #else
 206 static inline int vlan_gvrp_request_join(const struct net_device *dev) { return 0; }
 207 static inline void vlan_gvrp_request_leave(const struct net_device *dev) {}
 208 static inline int vlan_gvrp_init_applicant(struct net_device *dev) { return 0; }
 209 static inline void vlan_gvrp_uninit_applicant(struct net_device *dev) {}
 210 static inline int vlan_gvrp_init(void) { return 0; }
 211 static inline void vlan_gvrp_uninit(void) {}
 212 #endif
 213
 214 #ifdef CONFIG_VLAN_8021Q_MVRP
 215 int vlan_mvrp_request_join(const struct net_device *dev);
 216 void vlan_mvrp_request_leave(const struct net_device *dev);
 217 int vlan_mvrp_init_applicant(struct net_device *dev);
 218 void vlan_mvrp_uninit_applicant(struct net_device *dev);
 219 int vlan_mvrp_init(void);
 220 void vlan_mvrp_uninit(void);
 221 #else
 222 static inline int vlan_mvrp_request_join(const struct net_device *dev) { return 0; }
 223 static inline void vlan_mvrp_request_leave(const struct net_device *dev) {}
 224 static inline int vlan_mvrp_init_applicant(struct net_device *dev) { return 0; }
 225 static inline void vlan_mvrp_uninit_applicant(struct net_device *dev) {}
 226 static inline int vlan_mvrp_init(void) { return 0; }
 227 static inline void vlan_mvrp_uninit(void) {}
 228 #endif
 229
 230 extern const char vlan_fullname[];
 231 extern const char vlan_version[];
 232 int vlan_netlink_init(void);
 233 void vlan_netlink_fini(void);
 234
 235 extern struct rtnl_link_ops vlan_link_ops;
 236
 237 extern int vlan_net_id;
 238
 239 struct proc_dir_entry;
 240
 241 struct vlan_net {
 242         /* /proc/net/vlan */
 243         struct proc_dir_entry *proc_vlan_dir;
 244         /* /proc/net/vlan/config */
 245         struct proc_dir_entry *proc_vlan_conf;
 246         /* Determines interface naming scheme. */
 247         unsigned short name_type;
 248 };
 249
 250 #endif /* !(__BEN_VLAN_802_1Q_INC__) */