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linux/net/8021q/vlan.h
Patrick McHardy 8da63a655d net: vlan: fix up vlan_proto_idx() for CONFIG_BUG=n 
Add missing return statement for CONFIG_BUG=n.

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-04-21 15:58:19 -04:00

251 lines
7.5 KiB
C
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#ifndef __BEN_VLAN_802_1Q_INC__
#define __BEN_VLAN_802_1Q_INC__
#include <linux/if_vlan.h>
#include <linux/u64_stats_sync.h>
#include <linux/list.h>
/**
* struct vlan_priority_tci_mapping - vlan egress priority mappings
* @priority: skb priority
* @vlan_qos: vlan priority: (skb->priority << 13) & 0xE000
* @next: pointer to next struct
*/
struct vlan_priority_tci_mapping {
u32 priority;
u16 vlan_qos;
struct vlan_priority_tci_mapping *next;
};
/**
* struct vlan_pcpu_stats - VLAN percpu rx/tx stats
* @rx_packets: number of received packets
* @rx_bytes: number of received bytes
* @rx_multicast: number of received multicast packets
* @tx_packets: number of transmitted packets
* @tx_bytes: number of transmitted bytes
* @syncp: synchronization point for 64bit counters
* @rx_errors: number of rx errors
* @tx_dropped: number of tx drops
*/
struct vlan_pcpu_stats {
u64 rx_packets;
u64 rx_bytes;
u64 rx_multicast;
u64 tx_packets;
u64 tx_bytes;
struct u64_stats_sync syncp;
u32 rx_errors;
u32 tx_dropped;
};
struct netpoll;
/**
* struct vlan_dev_priv - VLAN private device data
* @nr_ingress_mappings: number of ingress priority mappings
* @ingress_priority_map: ingress priority mappings
* @nr_egress_mappings: number of egress priority mappings
* @egress_priority_map: hash of egress priority mappings
* @vlan_proto: VLAN encapsulation protocol
* @vlan_id: VLAN identifier
* @flags: device flags
* @real_dev: underlying netdevice
* @real_dev_addr: address of underlying netdevice
* @dent: proc dir entry
* @vlan_pcpu_stats: ptr to percpu rx stats
*/
struct vlan_dev_priv {
unsigned int nr_ingress_mappings;
u32 ingress_priority_map[8];
unsigned int nr_egress_mappings;
struct vlan_priority_tci_mapping *egress_priority_map[16];
__be16 vlan_proto;
u16 vlan_id;
u16 flags;
struct net_device *real_dev;
unsigned char real_dev_addr[ETH_ALEN];
struct proc_dir_entry *dent;
struct vlan_pcpu_stats __percpu *vlan_pcpu_stats;
#ifdef CONFIG_NET_POLL_CONTROLLER
struct netpoll *netpoll;
#endif
};
static inline struct vlan_dev_priv *vlan_dev_priv(const struct net_device *dev)
{
return netdev_priv(dev);
}
/* if this changes, algorithm will have to be reworked because this
* depends on completely exhausting the VLAN identifier space. Thus
* it gives constant time look-up, but in many cases it wastes memory.
*/
#define VLAN_GROUP_ARRAY_SPLIT_PARTS 8
#define VLAN_GROUP_ARRAY_PART_LEN (VLAN_N_VID/VLAN_GROUP_ARRAY_SPLIT_PARTS)
enum vlan_protos {
VLAN_PROTO_8021Q = 0,
VLAN_PROTO_8021AD,
VLAN_PROTO_NUM,
};
struct vlan_group {
unsigned int nr_vlan_devs;
struct hlist_node hlist; /* linked list */
struct net_device **vlan_devices_arrays[VLAN_PROTO_NUM]
[VLAN_GROUP_ARRAY_SPLIT_PARTS];
};
struct vlan_info {
struct net_device *real_dev; /* The ethernet(like) device
* the vlan is attached to.
*/
struct vlan_group grp;
struct list_head vid_list;
unsigned int nr_vids;
struct rcu_head rcu;
};
static inline unsigned int vlan_proto_idx(__be16 proto)
{
switch (proto) {
case __constant_htons(ETH_P_8021Q):
return VLAN_PROTO_8021Q;
case __constant_htons(ETH_P_8021AD):
return VLAN_PROTO_8021AD;
default:
BUG();
return 0;
}
}
static inline struct net_device *__vlan_group_get_device(struct vlan_group *vg,
unsigned int pidx,
u16 vlan_id)
{
struct net_device **array;
array = vg->vlan_devices_arrays[pidx]
[vlan_id / VLAN_GROUP_ARRAY_PART_LEN];
return array ? array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN] : NULL;
}
static inline struct net_device *vlan_group_get_device(struct vlan_group *vg,
__be16 vlan_proto,
u16 vlan_id)
{
return __vlan_group_get_device(vg, vlan_proto_idx(vlan_proto), vlan_id);
}
static inline void vlan_group_set_device(struct vlan_group *vg,
__be16 vlan_proto, u16 vlan_id,
struct net_device *dev)
{
struct net_device **array;
if (!vg)
return;
array = vg->vlan_devices_arrays[vlan_proto_idx(vlan_proto)]
[vlan_id / VLAN_GROUP_ARRAY_PART_LEN];
array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN] = dev;
}
/* Must be invoked with rcu_read_lock or with RTNL. */
static inline struct net_device *vlan_find_dev(struct net_device *real_dev,
__be16 vlan_proto, u16 vlan_id)
{
struct vlan_info *vlan_info = rcu_dereference_rtnl(real_dev->vlan_info);
if (vlan_info)
return vlan_group_get_device(&vlan_info->grp,
vlan_proto, vlan_id);
return NULL;
}
#define vlan_group_for_each_dev(grp, i, dev) \
for ((i) = 0; i < VLAN_PROTO_NUM * VLAN_N_VID; i++) \
if (((dev) = __vlan_group_get_device((grp), (i) / VLAN_N_VID, \
(i) % VLAN_N_VID)))
/* found in vlan_dev.c */
void vlan_dev_set_ingress_priority(const struct net_device *dev,
u32 skb_prio, u16 vlan_prio);
int vlan_dev_set_egress_priority(const struct net_device *dev,
u32 skb_prio, u16 vlan_prio);
int vlan_dev_change_flags(const struct net_device *dev, u32 flag, u32 mask);
void vlan_dev_get_realdev_name(const struct net_device *dev, char *result);
int vlan_check_real_dev(struct net_device *real_dev,
__be16 protocol, u16 vlan_id);
void vlan_setup(struct net_device *dev);
int register_vlan_dev(struct net_device *dev);
void unregister_vlan_dev(struct net_device *dev, struct list_head *head);
static inline u32 vlan_get_ingress_priority(struct net_device *dev,
u16 vlan_tci)
{
struct vlan_dev_priv *vip = vlan_dev_priv(dev);
return vip->ingress_priority_map[(vlan_tci >> VLAN_PRIO_SHIFT) & 0x7];
}
#ifdef CONFIG_VLAN_8021Q_GVRP
extern int vlan_gvrp_request_join(const struct net_device *dev);
extern void vlan_gvrp_request_leave(const struct net_device *dev);
extern int vlan_gvrp_init_applicant(struct net_device *dev);
extern void vlan_gvrp_uninit_applicant(struct net_device *dev);
extern int vlan_gvrp_init(void);
extern void vlan_gvrp_uninit(void);
#else
static inline int vlan_gvrp_request_join(const struct net_device *dev) { return 0; }
static inline void vlan_gvrp_request_leave(const struct net_device *dev) {}
static inline int vlan_gvrp_init_applicant(struct net_device *dev) { return 0; }
static inline void vlan_gvrp_uninit_applicant(struct net_device *dev) {}
static inline int vlan_gvrp_init(void) { return 0; }
static inline void vlan_gvrp_uninit(void) {}
#endif
#ifdef CONFIG_VLAN_8021Q_MVRP
extern int vlan_mvrp_request_join(const struct net_device *dev);
extern void vlan_mvrp_request_leave(const struct net_device *dev);
extern int vlan_mvrp_init_applicant(struct net_device *dev);
extern void vlan_mvrp_uninit_applicant(struct net_device *dev);
extern int vlan_mvrp_init(void);
extern void vlan_mvrp_uninit(void);
#else
static inline int vlan_mvrp_request_join(const struct net_device *dev) { return 0; }
static inline void vlan_mvrp_request_leave(const struct net_device *dev) {}
static inline int vlan_mvrp_init_applicant(struct net_device *dev) { return 0; }
static inline void vlan_mvrp_uninit_applicant(struct net_device *dev) {}
static inline int vlan_mvrp_init(void) { return 0; }
static inline void vlan_mvrp_uninit(void) {}
#endif
extern const char vlan_fullname[];
extern const char vlan_version[];
extern int vlan_netlink_init(void);
extern void vlan_netlink_fini(void);
extern struct rtnl_link_ops vlan_link_ops;
extern int vlan_net_id;
struct proc_dir_entry;
struct vlan_net {
/* /proc/net/vlan */
struct proc_dir_entry *proc_vlan_dir;
/* /proc/net/vlan/config */
struct proc_dir_entry *proc_vlan_conf;
/* Determines interface naming scheme. */
unsigned short name_type;
};
#endif /* !(__BEN_VLAN_802_1Q_INC__) */
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