netfilter: invoke synchronize_rcu after set the _hook_ to NULL
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / 8021q / vlan.h
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1da177e4
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1#ifndef __BEN_VLAN_802_1Q_INC__
2#define __BEN_VLAN_802_1Q_INC__
3
4#include <linux/if_vlan.h>
9618e2ff 5#include <linux/u64_stats_sync.h>
5b9ea6e0 6#include <linux/list.h>
1da177e4 7
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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 */
15struct vlan_priority_tci_mapping {
16 u32 priority;
9bb8582e 17 u16 vlan_qos;
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18 struct vlan_priority_tci_mapping *next;
19};
20
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21
22/**
4af429d2 23 * struct vlan_pcpu_stats - VLAN percpu rx/tx stats
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24 * @rx_packets: number of received packets
25 * @rx_bytes: number of received bytes
9618e2ff 26 * @rx_multicast: number of received multicast packets
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27 * @tx_packets: number of transmitted packets
28 * @tx_bytes: number of transmitted bytes
9618e2ff 29 * @syncp: synchronization point for 64bit counters
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30 * @rx_errors: number of rx errors
31 * @tx_dropped: number of tx drops
9793241f 32 */
4af429d2 33struct vlan_pcpu_stats {
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34 u64 rx_packets;
35 u64 rx_bytes;
36 u64 rx_multicast;
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37 u64 tx_packets;
38 u64 tx_bytes;
9618e2ff 39 struct u64_stats_sync syncp;
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40 u32 rx_errors;
41 u32 tx_dropped;
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42};
43
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44struct netpoll;
45
22d1ba74 46/**
7da82c06 47 * struct vlan_dev_priv - VLAN private device data
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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
1fd9b1fc 52 * @vlan_proto: VLAN encapsulation protocol
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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
4af429d2 58 * @vlan_pcpu_stats: ptr to percpu rx stats
22d1ba74 59 */
7da82c06 60struct vlan_dev_priv {
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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
1fd9b1fc 66 __be16 vlan_proto;
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67 u16 vlan_id;
68 u16 flags;
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69
70 struct net_device *real_dev;
71 unsigned char real_dev_addr[ETH_ALEN];
72
73 struct proc_dir_entry *dent;
4af429d2 74 struct vlan_pcpu_stats __percpu *vlan_pcpu_stats;
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75#ifdef CONFIG_NET_POLL_CONTROLLER
76 struct netpoll *netpoll;
77#endif
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78};
79
7da82c06 80static inline struct vlan_dev_priv *vlan_dev_priv(const struct net_device *dev)
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81{
82 return netdev_priv(dev);
83}
84
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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
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92enum vlan_protos {
93 VLAN_PROTO_8021Q = 0,
8ad227ff 94 VLAN_PROTO_8021AD,
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95 VLAN_PROTO_NUM,
96};
97
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98struct vlan_group {
99 unsigned int nr_vlan_devs;
100 struct hlist_node hlist; /* linked list */
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101 struct net_device **vlan_devices_arrays[VLAN_PROTO_NUM]
102 [VLAN_GROUP_ARRAY_SPLIT_PARTS];
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103};
104
105struct 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
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115static inline unsigned int vlan_proto_idx(__be16 proto)
116{
117 switch (proto) {
118 case __constant_htons(ETH_P_8021Q):
119 return VLAN_PROTO_8021Q;
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120 case __constant_htons(ETH_P_8021AD):
121 return VLAN_PROTO_8021AD;
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122 default:
123 BUG();
8da63a65 124 return 0;
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125 }
126}
127
128static inline struct net_device *__vlan_group_get_device(struct vlan_group *vg,
129 unsigned int pidx,
130 u16 vlan_id)
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131{
132 struct net_device **array;
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133
134 array = vg->vlan_devices_arrays[pidx]
135 [vlan_id / VLAN_GROUP_ARRAY_PART_LEN];
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136 return array ? array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN] : NULL;
137}
138
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139static 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
536d1d4a 146static inline void vlan_group_set_device(struct vlan_group *vg,
1fd9b1fc 147 __be16 vlan_proto, u16 vlan_id,
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148 struct net_device *dev)
149{
150 struct net_device **array;
151 if (!vg)
152 return;
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153 array = vg->vlan_devices_arrays[vlan_proto_idx(vlan_proto)]
154 [vlan_id / VLAN_GROUP_ARRAY_PART_LEN];
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155 array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN] = dev;
156}
157
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158/* Must be invoked with rcu_read_lock or with RTNL. */
159static inline struct net_device *vlan_find_dev(struct net_device *real_dev,
1fd9b1fc 160 __be16 vlan_proto, u16 vlan_id)
69ecca86 161{
5b9ea6e0 162 struct vlan_info *vlan_info = rcu_dereference_rtnl(real_dev->vlan_info);
69ecca86 163
5b9ea6e0 164 if (vlan_info)
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165 return vlan_group_get_device(&vlan_info->grp,
166 vlan_proto, vlan_id);
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167
168 return NULL;
169}
170
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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
1da177e4 176/* found in vlan_dev.c */
c17d8874 177void vlan_dev_set_ingress_priority(const struct net_device *dev,
9bb8582e 178 u32 skb_prio, u16 vlan_prio);
c17d8874 179int vlan_dev_set_egress_priority(const struct net_device *dev,
9bb8582e 180 u32 skb_prio, u16 vlan_prio);
b3ce0325 181int vlan_dev_change_flags(const struct net_device *dev, u32 flag, u32 mask);
c17d8874 182void vlan_dev_get_realdev_name(const struct net_device *dev, char *result);
1da177e4 183
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184int vlan_check_real_dev(struct net_device *real_dev,
185 __be16 protocol, u16 vlan_id);
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186void vlan_setup(struct net_device *dev);
187int register_vlan_dev(struct net_device *dev);
23289a37 188void unregister_vlan_dev(struct net_device *dev, struct list_head *head);
07b5b17e 189
7750f403 190static inline u32 vlan_get_ingress_priority(struct net_device *dev,
9bb8582e 191 u16 vlan_tci)
7750f403 192{
7da82c06 193 struct vlan_dev_priv *vip = vlan_dev_priv(dev);
7750f403 194
05423b24 195 return vip->ingress_priority_map[(vlan_tci >> VLAN_PRIO_SHIFT) & 0x7];
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196}
197
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198#ifdef CONFIG_VLAN_8021Q_GVRP
199extern int vlan_gvrp_request_join(const struct net_device *dev);
200extern void vlan_gvrp_request_leave(const struct net_device *dev);
201extern int vlan_gvrp_init_applicant(struct net_device *dev);
202extern void vlan_gvrp_uninit_applicant(struct net_device *dev);
203extern int vlan_gvrp_init(void);
204extern void vlan_gvrp_uninit(void);
205#else
206static inline int vlan_gvrp_request_join(const struct net_device *dev) { return 0; }
207static inline void vlan_gvrp_request_leave(const struct net_device *dev) {}
208static inline int vlan_gvrp_init_applicant(struct net_device *dev) { return 0; }
209static inline void vlan_gvrp_uninit_applicant(struct net_device *dev) {}
210static inline int vlan_gvrp_init(void) { return 0; }
211static inline void vlan_gvrp_uninit(void) {}
212#endif
213
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214#ifdef CONFIG_VLAN_8021Q_MVRP
215extern int vlan_mvrp_request_join(const struct net_device *dev);
216extern void vlan_mvrp_request_leave(const struct net_device *dev);
217extern int vlan_mvrp_init_applicant(struct net_device *dev);
218extern void vlan_mvrp_uninit_applicant(struct net_device *dev);
219extern int vlan_mvrp_init(void);
220extern void vlan_mvrp_uninit(void);
221#else
222static inline int vlan_mvrp_request_join(const struct net_device *dev) { return 0; }
223static inline void vlan_mvrp_request_leave(const struct net_device *dev) {}
224static inline int vlan_mvrp_init_applicant(struct net_device *dev) { return 0; }
225static inline void vlan_mvrp_uninit_applicant(struct net_device *dev) {}
226static inline int vlan_mvrp_init(void) { return 0; }
227static inline void vlan_mvrp_uninit(void) {}
228#endif
229
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230extern const char vlan_fullname[];
231extern const char vlan_version[];
232extern int vlan_netlink_init(void);
233extern void vlan_netlink_fini(void);
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234
235extern struct rtnl_link_ops vlan_link_ops;
236
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237extern int vlan_net_id;
238
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239struct proc_dir_entry;
240
d9ed0f0e 241struct vlan_net {
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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;
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246 /* Determines interface naming scheme. */
247 unsigned short name_type;
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248};
249
1da177e4 250#endif /* !(__BEN_VLAN_802_1Q_INC__) */