mqprio: Avoid panic if no options are provided
[linux-2.6.git] / 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
7
8 /**
9  *      struct vlan_priority_tci_mapping - vlan egress priority mappings
10  *      @priority: skb priority
11  *      @vlan_qos: vlan priority: (skb->priority << 13) & 0xE000
12  *      @next: pointer to next struct
13  */
14 struct vlan_priority_tci_mapping {
15         u32                                     priority;
16         u16                                     vlan_qos;
17         struct vlan_priority_tci_mapping        *next;
18 };
19
20
21 /**
22  *      struct vlan_pcpu_stats - VLAN percpu rx/tx stats
23  *      @rx_packets: number of received packets
24  *      @rx_bytes: number of received bytes
25  *      @rx_multicast: number of received multicast packets
26  *      @tx_packets: number of transmitted packets
27  *      @tx_bytes: number of transmitted bytes
28  *      @syncp: synchronization point for 64bit counters
29  *      @rx_errors: number of rx errors
30  *      @tx_dropped: number of tx drops
31  */
32 struct vlan_pcpu_stats {
33         u64                     rx_packets;
34         u64                     rx_bytes;
35         u64                     rx_multicast;
36         u64                     tx_packets;
37         u64                     tx_bytes;
38         struct u64_stats_sync   syncp;
39         u32                     rx_errors;
40         u32                     tx_dropped;
41 };
42
43 /**
44  *      struct vlan_dev_info - VLAN private device data
45  *      @nr_ingress_mappings: number of ingress priority mappings
46  *      @ingress_priority_map: ingress priority mappings
47  *      @nr_egress_mappings: number of egress priority mappings
48  *      @egress_priority_map: hash of egress priority mappings
49  *      @vlan_id: VLAN identifier
50  *      @flags: device flags
51  *      @real_dev: underlying netdevice
52  *      @real_dev_addr: address of underlying netdevice
53  *      @dent: proc dir entry
54  *      @vlan_pcpu_stats: ptr to percpu rx stats
55  */
56 struct vlan_dev_info {
57         unsigned int                            nr_ingress_mappings;
58         u32                                     ingress_priority_map[8];
59         unsigned int                            nr_egress_mappings;
60         struct vlan_priority_tci_mapping        *egress_priority_map[16];
61
62         u16                                     vlan_id;
63         u16                                     flags;
64
65         struct net_device                       *real_dev;
66         unsigned char                           real_dev_addr[ETH_ALEN];
67
68         struct proc_dir_entry                   *dent;
69         struct vlan_pcpu_stats __percpu         *vlan_pcpu_stats;
70 };
71
72 static inline struct vlan_dev_info *vlan_dev_info(const struct net_device *dev)
73 {
74         return netdev_priv(dev);
75 }
76
77 static inline struct net_device *vlan_group_get_device(struct vlan_group *vg,
78                                                        u16 vlan_id)
79 {
80         struct net_device **array;
81         array = vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN];
82         return array ? array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN] : NULL;
83 }
84
85 static inline void vlan_group_set_device(struct vlan_group *vg,
86                                          u16 vlan_id,
87                                          struct net_device *dev)
88 {
89         struct net_device **array;
90         if (!vg)
91                 return;
92         array = vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN];
93         array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN] = dev;
94 }
95
96 /* Must be invoked with rcu_read_lock or with RTNL. */
97 static inline struct net_device *vlan_find_dev(struct net_device *real_dev,
98                                                u16 vlan_id)
99 {
100         struct vlan_group *grp = rcu_dereference_rtnl(real_dev->vlgrp);
101
102         if (grp)
103                 return vlan_group_get_device(grp, vlan_id);
104
105         return NULL;
106 }
107
108 /* found in vlan_dev.c */
109 void vlan_dev_set_ingress_priority(const struct net_device *dev,
110                                    u32 skb_prio, u16 vlan_prio);
111 int vlan_dev_set_egress_priority(const struct net_device *dev,
112                                  u32 skb_prio, u16 vlan_prio);
113 int vlan_dev_change_flags(const struct net_device *dev, u32 flag, u32 mask);
114 void vlan_dev_get_realdev_name(const struct net_device *dev, char *result);
115
116 int vlan_check_real_dev(struct net_device *real_dev, u16 vlan_id);
117 void vlan_setup(struct net_device *dev);
118 int register_vlan_dev(struct net_device *dev);
119 void unregister_vlan_dev(struct net_device *dev, struct list_head *head);
120
121 static inline u32 vlan_get_ingress_priority(struct net_device *dev,
122                                             u16 vlan_tci)
123 {
124         struct vlan_dev_info *vip = vlan_dev_info(dev);
125
126         return vip->ingress_priority_map[(vlan_tci >> VLAN_PRIO_SHIFT) & 0x7];
127 }
128
129 #ifdef CONFIG_VLAN_8021Q_GVRP
130 extern int vlan_gvrp_request_join(const struct net_device *dev);
131 extern void vlan_gvrp_request_leave(const struct net_device *dev);
132 extern int vlan_gvrp_init_applicant(struct net_device *dev);
133 extern void vlan_gvrp_uninit_applicant(struct net_device *dev);
134 extern int vlan_gvrp_init(void);
135 extern void vlan_gvrp_uninit(void);
136 #else
137 static inline int vlan_gvrp_request_join(const struct net_device *dev) { return 0; }
138 static inline void vlan_gvrp_request_leave(const struct net_device *dev) {}
139 static inline int vlan_gvrp_init_applicant(struct net_device *dev) { return 0; }
140 static inline void vlan_gvrp_uninit_applicant(struct net_device *dev) {}
141 static inline int vlan_gvrp_init(void) { return 0; }
142 static inline void vlan_gvrp_uninit(void) {}
143 #endif
144
145 extern const char vlan_fullname[];
146 extern const char vlan_version[];
147 extern int vlan_netlink_init(void);
148 extern void vlan_netlink_fini(void);
149
150 extern struct rtnl_link_ops vlan_link_ops;
151
152 extern int vlan_net_id;
153
154 struct proc_dir_entry;
155
156 struct vlan_net {
157         /* /proc/net/vlan */
158         struct proc_dir_entry *proc_vlan_dir;
159         /* /proc/net/vlan/config */
160         struct proc_dir_entry *proc_vlan_conf;
161         /* Determines interface naming scheme. */
162         unsigned short name_type;
163 };
164
165 #endif /* !(__BEN_VLAN_802_1Q_INC__) */