diff options
Diffstat (limited to 'net/8021q/vlan.h')
| -rw-r--r-- | net/8021q/vlan.h | 206 |
1 files changed, 206 insertions, 0 deletions
diff --git a/net/8021q/vlan.h b/net/8021q/vlan.h new file mode 100644 index 0000000000..5eaf388755 --- /dev/null +++ b/net/8021q/vlan.h @@ -0,0 +1,206 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#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> + +/* 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 int vlan_proto_idx(__be16 proto) +{ + switch (proto) { + case htons(ETH_P_8021Q): + return VLAN_PROTO_8021Q; + case htons(ETH_P_8021AD): + return VLAN_PROTO_8021AD; + default: + WARN(1, "invalid VLAN protocol: 0x%04x\n", ntohs(proto)); + return -EINVAL; + } +} + +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]; + + /* paired with smp_wmb() in vlan_group_prealloc_vid() */ + smp_rmb(); + + 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) +{ + int pidx = vlan_proto_idx(vlan_proto); + + if (pidx < 0) + return NULL; + + return __vlan_group_get_device(vg, pidx, vlan_id); +} + +static inline void vlan_group_set_device(struct vlan_group *vg, + __be16 vlan_proto, u16 vlan_id, + struct net_device *dev) +{ + int pidx = vlan_proto_idx(vlan_proto); + struct net_device **array; + + if (!vg || pidx < 0) + return; + array = vg->vlan_devices_arrays[pidx] + [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; +} + +static inline netdev_features_t vlan_tnl_features(struct net_device *real_dev) +{ + netdev_features_t ret; + + ret = real_dev->hw_enc_features & + (NETIF_F_CSUM_MASK | NETIF_F_GSO_SOFTWARE | + NETIF_F_GSO_ENCAP_ALL); + + if ((ret & NETIF_F_GSO_ENCAP_ALL) && (ret & NETIF_F_CSUM_MASK)) + return (ret & ~NETIF_F_CSUM_MASK) | NETIF_F_HW_CSUM; + return 0; +} + +#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))) + +int vlan_filter_push_vids(struct vlan_info *vlan_info, __be16 proto); +void vlan_filter_drop_vids(struct vlan_info *vlan_info, __be16 proto); + +/* 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); +void vlan_dev_free_egress_priority(const struct net_device *dev); +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, + size_t size); + +int vlan_check_real_dev(struct net_device *real_dev, + __be16 protocol, u16 vlan_id, + struct netlink_ext_ack *extack); +void vlan_setup(struct net_device *dev); +int register_vlan_dev(struct net_device *dev, struct netlink_ext_ack *extack); +void unregister_vlan_dev(struct net_device *dev, struct list_head *head); +bool vlan_dev_inherit_address(struct net_device *dev, + struct net_device *real_dev); + +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 +int vlan_gvrp_request_join(const struct net_device *dev); +void vlan_gvrp_request_leave(const struct net_device *dev); +int vlan_gvrp_init_applicant(struct net_device *dev); +void vlan_gvrp_uninit_applicant(struct net_device *dev); +int vlan_gvrp_init(void); +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 +int vlan_mvrp_request_join(const struct net_device *dev); +void vlan_mvrp_request_leave(const struct net_device *dev); +int vlan_mvrp_init_applicant(struct net_device *dev); +void vlan_mvrp_uninit_applicant(struct net_device *dev); +int vlan_mvrp_init(void); +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[]; +int vlan_netlink_init(void); +void vlan_netlink_fini(void); + +extern struct rtnl_link_ops vlan_link_ops; + +extern unsigned 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__) */ |