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_NUM,
  95 };
  96
  97 struct vlan_group {
  98         unsigned int            nr_vlan_devs;
  99         struct hlist_node       hlist;  /* linked list */
 100         struct net_device **vlan_devices_arrays[VLAN_PROTO_NUM]
 101                                                [VLAN_GROUP_ARRAY_SPLIT_PARTS];
 102 };
 103
 104 struct vlan_info {
 105         struct net_device       *real_dev; /* The ethernet(like) device
 106                                             * the vlan is attached to.
 107                                             */
 108         struct vlan_group       grp;
 109         struct list_head        vid_list;
 110         unsigned int            nr_vids;
 111         struct rcu_head         rcu;
 112 };
 113
 114 static inline unsigned int vlan_proto_idx(__be16 proto)
 115 {
 116         switch (proto) {
 117         case __constant_htons(ETH_P_8021Q):
 118                 return VLAN_PROTO_8021Q;
 119         default:
 120                 BUG();
 121         }
 122 }
 123
 124 static inline struct net_device *__vlan_group_get_device(struct vlan_group *vg,
 125                                                          unsigned int pidx,
 126                                                          u16 vlan_id)
 127 {
 128         struct net_device **array;
 129
 130         array = vg->vlan_devices_arrays[pidx]
 131                                        [vlan_id / VLAN_GROUP_ARRAY_PART_LEN];
 132         return array ? array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN] : NULL;
 133 }
 134
 135 static inline struct net_device *vlan_group_get_device(struct vlan_group *vg,
 136                                                        __be16 vlan_proto,
 137                                                        u16 vlan_id)
 138 {
 139         return __vlan_group_get_device(vg, vlan_proto_idx(vlan_proto), vlan_id);
 140 }
 141
 142 static inline void vlan_group_set_device(struct vlan_group *vg,
 143                                          __be16 vlan_proto, u16 vlan_id,
 144                                          struct net_device *dev)
 145 {
 146         struct net_device **array;
 147         if (!vg)
 148                 return;
 149         array = vg->vlan_devices_arrays[vlan_proto_idx(vlan_proto)]
 150                                        [vlan_id / VLAN_GROUP_ARRAY_PART_LEN];
 151         array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN] = dev;
 152 }
 153
 154 /* Must be invoked with rcu_read_lock or with RTNL. */
 155 static inline struct net_device *vlan_find_dev(struct net_device *real_dev,
 156                                                __be16 vlan_proto, u16 vlan_id)
 157 {
 158         struct vlan_info *vlan_info = rcu_dereference_rtnl(real_dev->vlan_info);
 159
 160         if (vlan_info)
 161                 return vlan_group_get_device(&vlan_info->grp,
 162                                              vlan_proto, vlan_id);
 163
 164         return NULL;
 165 }
 166
 167 #define vlan_group_for_each_dev(grp, i, dev) \
 168         for ((i) = 0; i < VLAN_PROTO_NUM * VLAN_N_VID; i++) \
 169                 if (((dev) = __vlan_group_get_device((grp), (i) / VLAN_N_VID, \
 170                                                             (i) % VLAN_N_VID)))
 171
 172 /* found in vlan_dev.c */
 173 void vlan_dev_set_ingress_priority(const struct net_device *dev,
 174                                    u32 skb_prio, u16 vlan_prio);
 175 int vlan_dev_set_egress_priority(const struct net_device *dev,
 176                                  u32 skb_prio, u16 vlan_prio);
 177 int vlan_dev_change_flags(const struct net_device *dev, u32 flag, u32 mask);
 178 void vlan_dev_get_realdev_name(const struct net_device *dev, char *result);
 179
 180 int vlan_check_real_dev(struct net_device *real_dev,
 181                         __be16 protocol, u16 vlan_id);
 182 void vlan_setup(struct net_device *dev);
 183 int register_vlan_dev(struct net_device *dev);
 184 void unregister_vlan_dev(struct net_device *dev, struct list_head *head);
 185
 186 static inline u32 vlan_get_ingress_priority(struct net_device *dev,
 187                                             u16 vlan_tci)
 188 {
 189         struct vlan_dev_priv *vip = vlan_dev_priv(dev);
 190
 191         return vip->ingress_priority_map[(vlan_tci >> VLAN_PRIO_SHIFT) & 0x7];
 192 }
 193
 194 #ifdef CONFIG_VLAN_8021Q_GVRP
 195 extern int vlan_gvrp_request_join(const struct net_device *dev);
 196 extern void vlan_gvrp_request_leave(const struct net_device *dev);
 197 extern int vlan_gvrp_init_applicant(struct net_device *dev);
 198 extern void vlan_gvrp_uninit_applicant(struct net_device *dev);
 199 extern int vlan_gvrp_init(void);
 200 extern void vlan_gvrp_uninit(void);
 201 #else
 202 static inline int vlan_gvrp_request_join(const struct net_device *dev) { return 0; }
 203 static inline void vlan_gvrp_request_leave(const struct net_device *dev) {}
 204 static inline int vlan_gvrp_init_applicant(struct net_device *dev) { return 0; }
 205 static inline void vlan_gvrp_uninit_applicant(struct net_device *dev) {}
 206 static inline int vlan_gvrp_init(void) { return 0; }
 207 static inline void vlan_gvrp_uninit(void) {}
 208 #endif
 209
 210 #ifdef CONFIG_VLAN_8021Q_MVRP
 211 extern int vlan_mvrp_request_join(const struct net_device *dev);
 212 extern void vlan_mvrp_request_leave(const struct net_device *dev);
 213 extern int vlan_mvrp_init_applicant(struct net_device *dev);
 214 extern void vlan_mvrp_uninit_applicant(struct net_device *dev);
 215 extern int vlan_mvrp_init(void);
 216 extern void vlan_mvrp_uninit(void);
 217 #else
 218 static inline int vlan_mvrp_request_join(const struct net_device *dev) { return 0; }
 219 static inline void vlan_mvrp_request_leave(const struct net_device *dev) {}
 220 static inline int vlan_mvrp_init_applicant(struct net_device *dev) { return 0; }
 221 static inline void vlan_mvrp_uninit_applicant(struct net_device *dev) {}
 222 static inline int vlan_mvrp_init(void) { return 0; }
 223 static inline void vlan_mvrp_uninit(void) {}
 224 #endif
 225
 226 extern const char vlan_fullname[];
 227 extern const char vlan_version[];
 228 extern int vlan_netlink_init(void);
 229 extern void vlan_netlink_fini(void);
 230
 231 extern struct rtnl_link_ops vlan_link_ops;
 232
 233 extern int vlan_net_id;
 234
 235 struct proc_dir_entry;
 236
 237 struct vlan_net {
 238         /* /proc/net/vlan */
 239         struct proc_dir_entry *proc_vlan_dir;
 240         /* /proc/net/vlan/config */
 241         struct proc_dir_entry *proc_vlan_conf;
 242         /* Determines interface naming scheme. */
 243         unsigned short name_type;
 244 };
 245
 246 #endif /* !(__BEN_VLAN_802_1Q_INC__) */