207 lines
6.3 KiB
C
207 lines
6.3 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __BEN_VLAN_802_1Q_INC__
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#define __BEN_VLAN_802_1Q_INC__
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#include <linux/if_vlan.h>
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#include <linux/u64_stats_sync.h>
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#include <linux/list.h>
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/* if this changes, algorithm will have to be reworked because this
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* depends on completely exhausting the VLAN identifier space. Thus
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* it gives constant time look-up, but in many cases it wastes memory.
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*/
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#define VLAN_GROUP_ARRAY_SPLIT_PARTS 8
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#define VLAN_GROUP_ARRAY_PART_LEN (VLAN_N_VID/VLAN_GROUP_ARRAY_SPLIT_PARTS)
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enum vlan_protos {
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VLAN_PROTO_8021Q = 0,
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VLAN_PROTO_8021AD,
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VLAN_PROTO_NUM,
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};
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struct vlan_group {
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unsigned int nr_vlan_devs;
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struct hlist_node hlist; /* linked list */
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struct net_device **vlan_devices_arrays[VLAN_PROTO_NUM]
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[VLAN_GROUP_ARRAY_SPLIT_PARTS];
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};
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struct vlan_info {
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struct net_device *real_dev; /* The ethernet(like) device
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* the vlan is attached to.
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*/
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struct vlan_group grp;
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struct list_head vid_list;
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unsigned int nr_vids;
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struct rcu_head rcu;
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};
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static inline int vlan_proto_idx(__be16 proto)
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{
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switch (proto) {
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case htons(ETH_P_8021Q):
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return VLAN_PROTO_8021Q;
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case htons(ETH_P_8021AD):
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return VLAN_PROTO_8021AD;
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default:
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WARN(1, "invalid VLAN protocol: 0x%04x\n", ntohs(proto));
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return -EINVAL;
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}
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}
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static inline struct net_device *__vlan_group_get_device(struct vlan_group *vg,
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unsigned int pidx,
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u16 vlan_id)
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{
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struct net_device **array;
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array = vg->vlan_devices_arrays[pidx]
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[vlan_id / VLAN_GROUP_ARRAY_PART_LEN];
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/* paired with smp_wmb() in vlan_group_prealloc_vid() */
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smp_rmb();
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return array ? array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN] : NULL;
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}
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static inline struct net_device *vlan_group_get_device(struct vlan_group *vg,
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__be16 vlan_proto,
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u16 vlan_id)
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{
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int pidx = vlan_proto_idx(vlan_proto);
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if (pidx < 0)
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return NULL;
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return __vlan_group_get_device(vg, pidx, vlan_id);
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}
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static inline void vlan_group_set_device(struct vlan_group *vg,
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__be16 vlan_proto, u16 vlan_id,
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struct net_device *dev)
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{
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int pidx = vlan_proto_idx(vlan_proto);
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struct net_device **array;
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if (!vg || pidx < 0)
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return;
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array = vg->vlan_devices_arrays[pidx]
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[vlan_id / VLAN_GROUP_ARRAY_PART_LEN];
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array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN] = dev;
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}
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/* Must be invoked with rcu_read_lock or with RTNL. */
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static inline struct net_device *vlan_find_dev(struct net_device *real_dev,
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__be16 vlan_proto, u16 vlan_id)
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{
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struct vlan_info *vlan_info = rcu_dereference_rtnl(real_dev->vlan_info);
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if (vlan_info)
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return vlan_group_get_device(&vlan_info->grp,
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vlan_proto, vlan_id);
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return NULL;
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}
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static inline netdev_features_t vlan_tnl_features(struct net_device *real_dev)
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{
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netdev_features_t ret;
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ret = real_dev->hw_enc_features &
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(NETIF_F_CSUM_MASK | NETIF_F_GSO_SOFTWARE |
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NETIF_F_GSO_ENCAP_ALL);
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if ((ret & NETIF_F_GSO_ENCAP_ALL) && (ret & NETIF_F_CSUM_MASK))
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return (ret & ~NETIF_F_CSUM_MASK) | NETIF_F_HW_CSUM;
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return 0;
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}
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#define vlan_group_for_each_dev(grp, i, dev) \
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for ((i) = 0; i < VLAN_PROTO_NUM * VLAN_N_VID; i++) \
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if (((dev) = __vlan_group_get_device((grp), (i) / VLAN_N_VID, \
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(i) % VLAN_N_VID)))
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int vlan_filter_push_vids(struct vlan_info *vlan_info, __be16 proto);
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void vlan_filter_drop_vids(struct vlan_info *vlan_info, __be16 proto);
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/* found in vlan_dev.c */
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void vlan_dev_set_ingress_priority(const struct net_device *dev,
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u32 skb_prio, u16 vlan_prio);
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int vlan_dev_set_egress_priority(const struct net_device *dev,
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u32 skb_prio, u16 vlan_prio);
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void vlan_dev_free_egress_priority(const struct net_device *dev);
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int vlan_dev_change_flags(const struct net_device *dev, u32 flag, u32 mask);
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void vlan_dev_get_realdev_name(const struct net_device *dev, char *result,
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size_t size);
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int vlan_check_real_dev(struct net_device *real_dev,
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__be16 protocol, u16 vlan_id,
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struct netlink_ext_ack *extack);
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void vlan_setup(struct net_device *dev);
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int register_vlan_dev(struct net_device *dev, struct netlink_ext_ack *extack);
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void unregister_vlan_dev(struct net_device *dev, struct list_head *head);
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bool vlan_dev_inherit_address(struct net_device *dev,
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struct net_device *real_dev);
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static inline u32 vlan_get_ingress_priority(struct net_device *dev,
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u16 vlan_tci)
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{
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struct vlan_dev_priv *vip = vlan_dev_priv(dev);
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return vip->ingress_priority_map[(vlan_tci >> VLAN_PRIO_SHIFT) & 0x7];
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}
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#ifdef CONFIG_VLAN_8021Q_GVRP
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int vlan_gvrp_request_join(const struct net_device *dev);
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void vlan_gvrp_request_leave(const struct net_device *dev);
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int vlan_gvrp_init_applicant(struct net_device *dev);
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void vlan_gvrp_uninit_applicant(struct net_device *dev);
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int vlan_gvrp_init(void);
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void vlan_gvrp_uninit(void);
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#else
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static inline int vlan_gvrp_request_join(const struct net_device *dev) { return 0; }
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static inline void vlan_gvrp_request_leave(const struct net_device *dev) {}
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static inline int vlan_gvrp_init_applicant(struct net_device *dev) { return 0; }
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static inline void vlan_gvrp_uninit_applicant(struct net_device *dev) {}
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static inline int vlan_gvrp_init(void) { return 0; }
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static inline void vlan_gvrp_uninit(void) {}
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#endif
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#ifdef CONFIG_VLAN_8021Q_MVRP
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int vlan_mvrp_request_join(const struct net_device *dev);
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void vlan_mvrp_request_leave(const struct net_device *dev);
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int vlan_mvrp_init_applicant(struct net_device *dev);
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void vlan_mvrp_uninit_applicant(struct net_device *dev);
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int vlan_mvrp_init(void);
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void vlan_mvrp_uninit(void);
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#else
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static inline int vlan_mvrp_request_join(const struct net_device *dev) { return 0; }
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static inline void vlan_mvrp_request_leave(const struct net_device *dev) {}
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static inline int vlan_mvrp_init_applicant(struct net_device *dev) { return 0; }
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static inline void vlan_mvrp_uninit_applicant(struct net_device *dev) {}
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static inline int vlan_mvrp_init(void) { return 0; }
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static inline void vlan_mvrp_uninit(void) {}
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#endif
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extern const char vlan_fullname[];
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extern const char vlan_version[];
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int vlan_netlink_init(void);
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void vlan_netlink_fini(void);
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extern struct rtnl_link_ops vlan_link_ops;
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extern unsigned int vlan_net_id;
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struct proc_dir_entry;
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struct vlan_net {
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/* /proc/net/vlan */
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struct proc_dir_entry *proc_vlan_dir;
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/* /proc/net/vlan/config */
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struct proc_dir_entry *proc_vlan_conf;
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/* Determines interface naming scheme. */
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unsigned short name_type;
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};
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#endif /* !(__BEN_VLAN_802_1Q_INC__) */
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