tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __BEN_VLAN_802_1Q_INC__
3#define __BEN_VLAN_802_1Q_INC__
4
5#include <linux/if_vlan.h>
6#include <linux/u64_stats_sync.h>
7#include <linux/list.h>
8
9/* if this changes, algorithm will have to be reworked because this
10 * depends on completely exhausting the VLAN identifier space. Thus
11 * it gives constant time look-up, but in many cases it wastes memory.
12 */
13#define VLAN_GROUP_ARRAY_SPLIT_PARTS 8
14#define VLAN_GROUP_ARRAY_PART_LEN (VLAN_N_VID/VLAN_GROUP_ARRAY_SPLIT_PARTS)
15
16enum vlan_protos {
17 VLAN_PROTO_8021Q = 0,
18 VLAN_PROTO_8021AD,
19 VLAN_PROTO_NUM,
20};
21
22struct vlan_group {
23 unsigned int nr_vlan_devs;
24 struct hlist_node hlist; /* linked list */
25 struct net_device **vlan_devices_arrays[VLAN_PROTO_NUM]
26 [VLAN_GROUP_ARRAY_SPLIT_PARTS];
27};
28
29struct vlan_info {
30 struct net_device *real_dev; /* The ethernet(like) device
31 * the vlan is attached to.
32 */
33 struct vlan_group grp;
34 struct list_head vid_list;
35 unsigned int nr_vids;
36 bool auto_vid0;
37 struct rcu_head rcu;
38};
39
40static inline int vlan_proto_idx(__be16 proto)
41{
42 switch (proto) {
43 case htons(ETH_P_8021Q):
44 return VLAN_PROTO_8021Q;
45 case htons(ETH_P_8021AD):
46 return VLAN_PROTO_8021AD;
47 default:
48 WARN(1, "invalid VLAN protocol: 0x%04x\n", ntohs(proto));
49 return -EINVAL;
50 }
51}
52
53static inline struct net_device *__vlan_group_get_device(struct vlan_group *vg,
54 unsigned int pidx,
55 u16 vlan_id)
56{
57 struct net_device **array;
58
59 array = vg->vlan_devices_arrays[pidx]
60 [vlan_id / VLAN_GROUP_ARRAY_PART_LEN];
61
62 /* paired with smp_wmb() in vlan_group_prealloc_vid() */
63 smp_rmb();
64
65 return array ? array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN] : NULL;
66}
67
68static inline struct net_device *vlan_group_get_device(struct vlan_group *vg,
69 __be16 vlan_proto,
70 u16 vlan_id)
71{
72 int pidx = vlan_proto_idx(vlan_proto);
73
74 if (pidx < 0)
75 return NULL;
76
77 return __vlan_group_get_device(vg, pidx, vlan_id);
78}
79
80static inline void vlan_group_set_device(struct vlan_group *vg,
81 __be16 vlan_proto, u16 vlan_id,
82 struct net_device *dev)
83{
84 int pidx = vlan_proto_idx(vlan_proto);
85 struct net_device **array;
86
87 if (!vg || pidx < 0)
88 return;
89 array = vg->vlan_devices_arrays[pidx]
90 [vlan_id / VLAN_GROUP_ARRAY_PART_LEN];
91 array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN] = dev;
92}
93
94/* Must be invoked with rcu_read_lock or with RTNL. */
95static inline struct net_device *vlan_find_dev(struct net_device *real_dev,
96 __be16 vlan_proto, u16 vlan_id)
97{
98 struct vlan_info *vlan_info = rcu_dereference_rtnl(real_dev->vlan_info);
99
100 if (vlan_info)
101 return vlan_group_get_device(&vlan_info->grp,
102 vlan_proto, vlan_id);
103
104 return NULL;
105}
106
107static inline netdev_features_t vlan_tnl_features(struct net_device *real_dev)
108{
109 netdev_features_t ret;
110
111 ret = real_dev->hw_enc_features &
112 (NETIF_F_CSUM_MASK | NETIF_F_GSO_SOFTWARE |
113 NETIF_F_GSO_ENCAP_ALL);
114
115 if ((ret & NETIF_F_GSO_ENCAP_ALL) && (ret & NETIF_F_CSUM_MASK))
116 return (ret & ~NETIF_F_CSUM_MASK) | NETIF_F_HW_CSUM;
117 return 0;
118}
119
120#define vlan_group_for_each_dev(grp, i, dev) \
121 for ((i) = 0; i < VLAN_PROTO_NUM * VLAN_N_VID; i++) \
122 if (((dev) = __vlan_group_get_device((grp), (i) / VLAN_N_VID, \
123 (i) % VLAN_N_VID)))
124
125int vlan_filter_push_vids(struct vlan_info *vlan_info, __be16 proto);
126void vlan_filter_drop_vids(struct vlan_info *vlan_info, __be16 proto);
127
128/* found in vlan_dev.c */
129void vlan_dev_set_ingress_priority(const struct net_device *dev,
130 u32 skb_prio, u16 vlan_prio);
131int vlan_dev_set_egress_priority(const struct net_device *dev,
132 u32 skb_prio, u16 vlan_prio);
133void vlan_dev_free_egress_priority(const struct net_device *dev);
134int vlan_dev_change_flags(const struct net_device *dev, u32 flag, u32 mask);
135void vlan_dev_get_realdev_name(const struct net_device *dev, char *result,
136 size_t size);
137
138int vlan_check_real_dev(struct net_device *real_dev,
139 __be16 protocol, u16 vlan_id,
140 struct netlink_ext_ack *extack);
141void vlan_setup(struct net_device *dev);
142int register_vlan_dev(struct net_device *dev, struct netlink_ext_ack *extack);
143void unregister_vlan_dev(struct net_device *dev, struct list_head *head);
144bool vlan_dev_inherit_address(struct net_device *dev,
145 struct net_device *real_dev);
146
147static inline u32 vlan_get_ingress_priority(struct net_device *dev,
148 u16 vlan_tci)
149{
150 struct vlan_dev_priv *vip = vlan_dev_priv(dev);
151
152 return vip->ingress_priority_map[(vlan_tci >> VLAN_PRIO_SHIFT) & 0x7];
153}
154
155#ifdef CONFIG_VLAN_8021Q_GVRP
156int vlan_gvrp_request_join(const struct net_device *dev);
157void vlan_gvrp_request_leave(const struct net_device *dev);
158int vlan_gvrp_init_applicant(struct net_device *dev);
159void vlan_gvrp_uninit_applicant(struct net_device *dev);
160int vlan_gvrp_init(void);
161void vlan_gvrp_uninit(void);
162#else
163static inline int vlan_gvrp_request_join(const struct net_device *dev) { return 0; }
164static inline void vlan_gvrp_request_leave(const struct net_device *dev) {}
165static inline int vlan_gvrp_init_applicant(struct net_device *dev) { return 0; }
166static inline void vlan_gvrp_uninit_applicant(struct net_device *dev) {}
167static inline int vlan_gvrp_init(void) { return 0; }
168static inline void vlan_gvrp_uninit(void) {}
169#endif
170
171#ifdef CONFIG_VLAN_8021Q_MVRP
172int vlan_mvrp_request_join(const struct net_device *dev);
173void vlan_mvrp_request_leave(const struct net_device *dev);
174int vlan_mvrp_init_applicant(struct net_device *dev);
175void vlan_mvrp_uninit_applicant(struct net_device *dev);
176int vlan_mvrp_init(void);
177void vlan_mvrp_uninit(void);
178#else
179static inline int vlan_mvrp_request_join(const struct net_device *dev) { return 0; }
180static inline void vlan_mvrp_request_leave(const struct net_device *dev) {}
181static inline int vlan_mvrp_init_applicant(struct net_device *dev) { return 0; }
182static inline void vlan_mvrp_uninit_applicant(struct net_device *dev) {}
183static inline int vlan_mvrp_init(void) { return 0; }
184static inline void vlan_mvrp_uninit(void) {}
185#endif
186
187extern const char vlan_fullname[];
188extern const char vlan_version[];
189int vlan_netlink_init(void);
190void vlan_netlink_fini(void);
191
192extern struct rtnl_link_ops vlan_link_ops;
193
194extern unsigned int vlan_net_id;
195
196struct proc_dir_entry;
197
198struct vlan_net {
199 /* /proc/net/vlan */
200 struct proc_dir_entry *proc_vlan_dir;
201 /* /proc/net/vlan/config */
202 struct proc_dir_entry *proc_vlan_conf;
203 /* Determines interface naming scheme. */
204 unsigned short name_type;
205};
206
207#endif /* !(__BEN_VLAN_802_1Q_INC__) */