Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * VLAN An implementation of 802.1Q VLAN tagging. |
| 3 | * |
| 4 | * Authors: Ben Greear <greearb@candelatech.com> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License |
| 8 | * as published by the Free Software Foundation; either version |
| 9 | * 2 of the License, or (at your option) any later version. |
| 10 | * |
| 11 | */ |
| 12 | |
| 13 | #ifndef _LINUX_IF_VLAN_H_ |
| 14 | #define _LINUX_IF_VLAN_H_ |
| 15 | |
| 16 | #ifdef __KERNEL__ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | #include <linux/netdevice.h> |
Stephen Hemminger | 0610d11 | 2006-07-14 16:34:22 -0700 | [diff] [blame] | 18 | #include <linux/etherdevice.h> |
Jesse Gross | 65ac6a5 | 2010-10-20 13:56:05 +0000 | [diff] [blame] | 19 | #include <linux/rtnetlink.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | |
| 21 | #define VLAN_HLEN 4 /* The additional bytes (on top of the Ethernet header) |
| 22 | * that VLAN requires. |
| 23 | */ |
| 24 | #define VLAN_ETH_ALEN 6 /* Octets in one ethernet addr */ |
| 25 | #define VLAN_ETH_HLEN 18 /* Total octets in header. */ |
| 26 | #define VLAN_ETH_ZLEN 64 /* Min. octets in frame sans FCS */ |
| 27 | |
| 28 | /* |
| 29 | * According to 802.3ac, the packet can be 4 bytes longer. --Klika Jan |
| 30 | */ |
| 31 | #define VLAN_ETH_DATA_LEN 1500 /* Max. octets in payload */ |
| 32 | #define VLAN_ETH_FRAME_LEN 1518 /* Max. octets in frame sans FCS */ |
| 33 | |
Patrick McHardy | 740c15d | 2008-01-21 00:18:53 -0800 | [diff] [blame] | 34 | /* |
| 35 | * struct vlan_hdr - vlan header |
| 36 | * @h_vlan_TCI: priority and VLAN ID |
| 37 | * @h_vlan_encapsulated_proto: packet type ID or len |
| 38 | */ |
| 39 | struct vlan_hdr { |
| 40 | __be16 h_vlan_TCI; |
| 41 | __be16 h_vlan_encapsulated_proto; |
| 42 | }; |
| 43 | |
| 44 | /** |
| 45 | * struct vlan_ethhdr - vlan ethernet header (ethhdr + vlan_hdr) |
| 46 | * @h_dest: destination ethernet address |
| 47 | * @h_source: source ethernet address |
| 48 | * @h_vlan_proto: ethernet protocol (always 0x8100) |
| 49 | * @h_vlan_TCI: priority and VLAN ID |
| 50 | * @h_vlan_encapsulated_proto: packet type ID or len |
| 51 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | struct vlan_ethhdr { |
Patrick McHardy | 740c15d | 2008-01-21 00:18:53 -0800 | [diff] [blame] | 53 | unsigned char h_dest[ETH_ALEN]; |
| 54 | unsigned char h_source[ETH_ALEN]; |
| 55 | __be16 h_vlan_proto; |
| 56 | __be16 h_vlan_TCI; |
| 57 | __be16 h_vlan_encapsulated_proto; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | }; |
| 59 | |
| 60 | #include <linux/skbuff.h> |
| 61 | |
| 62 | static inline struct vlan_ethhdr *vlan_eth_hdr(const struct sk_buff *skb) |
| 63 | { |
Arnaldo Carvalho de Melo | 98e399f | 2007-03-19 15:33:04 -0700 | [diff] [blame] | 64 | return (struct vlan_ethhdr *)skb_mac_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | } |
| 66 | |
Eric Dumazet | 05423b2 | 2009-10-26 18:40:35 -0700 | [diff] [blame] | 67 | #define VLAN_PRIO_MASK 0xe000 /* Priority Code Point */ |
| 68 | #define VLAN_PRIO_SHIFT 13 |
| 69 | #define VLAN_CFI_MASK 0x1000 /* Canonical Format Indicator */ |
| 70 | #define VLAN_TAG_PRESENT VLAN_CFI_MASK |
| 71 | #define VLAN_VID_MASK 0x0fff /* VLAN Identifier */ |
Jesse Gross | b738127 | 2010-10-20 13:56:02 +0000 | [diff] [blame] | 72 | #define VLAN_N_VID 4096 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | |
| 74 | /* found in socket.c */ |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 75 | extern void vlan_ioctl_set(int (*hook)(struct net *, void __user *)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | /* if this changes, algorithm will have to be reworked because this |
| 78 | * depends on completely exhausting the VLAN identifier space. Thus |
| 79 | * it gives constant time look-up, but in many cases it wastes memory. |
| 80 | */ |
Dan Aloni | 5c15bde | 2007-03-02 20:44:51 -0800 | [diff] [blame] | 81 | #define VLAN_GROUP_ARRAY_SPLIT_PARTS 8 |
Jesse Gross | b738127 | 2010-10-20 13:56:02 +0000 | [diff] [blame] | 82 | #define VLAN_GROUP_ARRAY_PART_LEN (VLAN_N_VID/VLAN_GROUP_ARRAY_SPLIT_PARTS) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | |
| 84 | struct vlan_group { |
Pavel Emelyanov | a9fde26 | 2008-04-16 00:48:04 -0700 | [diff] [blame] | 85 | struct net_device *real_dev; /* The ethernet(like) device |
| 86 | * the vlan is attached to. |
| 87 | */ |
Patrick McHardy | af30151 | 2008-01-21 00:25:50 -0800 | [diff] [blame] | 88 | unsigned int nr_vlans; |
Eric Dumazet | 63c8099 | 2009-10-27 07:06:49 +0000 | [diff] [blame] | 89 | int killall; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | struct hlist_node hlist; /* linked list */ |
Dan Aloni | 5c15bde | 2007-03-02 20:44:51 -0800 | [diff] [blame] | 91 | struct net_device **vlan_devices_arrays[VLAN_GROUP_ARRAY_SPLIT_PARTS]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | struct rcu_head rcu; |
| 93 | }; |
| 94 | |
Eric Dumazet | f0b5a0d | 2008-01-08 23:54:43 -0800 | [diff] [blame] | 95 | static inline struct net_device *vlan_group_get_device(struct vlan_group *vg, |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 96 | u16 vlan_id) |
Dan Aloni | 5c15bde | 2007-03-02 20:44:51 -0800 | [diff] [blame] | 97 | { |
| 98 | struct net_device **array; |
| 99 | array = vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN]; |
Pavel Emelyanov | 6772718 | 2008-03-26 16:27:22 -0700 | [diff] [blame] | 100 | return array ? array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN] : NULL; |
Dan Aloni | 5c15bde | 2007-03-02 20:44:51 -0800 | [diff] [blame] | 101 | } |
| 102 | |
Eric Dumazet | f0b5a0d | 2008-01-08 23:54:43 -0800 | [diff] [blame] | 103 | static inline void vlan_group_set_device(struct vlan_group *vg, |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 104 | u16 vlan_id, |
Dan Aloni | 5c15bde | 2007-03-02 20:44:51 -0800 | [diff] [blame] | 105 | struct net_device *dev) |
| 106 | { |
| 107 | struct net_device **array; |
| 108 | if (!vg) |
| 109 | return; |
| 110 | array = vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN]; |
| 111 | array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN] = dev; |
| 112 | } |
| 113 | |
Eric Dumazet | 05423b2 | 2009-10-26 18:40:35 -0700 | [diff] [blame] | 114 | #define vlan_tx_tag_present(__skb) ((__skb)->vlan_tci & VLAN_TAG_PRESENT) |
| 115 | #define vlan_tx_tag_get(__skb) ((__skb)->vlan_tci & ~VLAN_TAG_PRESENT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | |
Patrick McHardy | 7750f40 | 2008-07-08 03:23:36 -0700 | [diff] [blame] | 117 | #if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE) |
Jesse Gross | 65ac6a5 | 2010-10-20 13:56:05 +0000 | [diff] [blame] | 118 | /* Must be invoked with rcu_read_lock or with RTNL. */ |
| 119 | static inline struct net_device *vlan_find_dev(struct net_device *real_dev, |
| 120 | u16 vlan_id) |
| 121 | { |
| 122 | struct vlan_group *grp = rcu_dereference_rtnl(real_dev->vlgrp); |
| 123 | |
| 124 | if (grp) |
| 125 | return vlan_group_get_device(grp, vlan_id); |
| 126 | |
| 127 | return NULL; |
| 128 | } |
| 129 | |
Patrick McHardy | 22d1ba7 | 2008-07-08 03:23:57 -0700 | [diff] [blame] | 130 | extern struct net_device *vlan_dev_real_dev(const struct net_device *dev); |
| 131 | extern u16 vlan_dev_vlan_id(const struct net_device *dev); |
| 132 | |
Patrick McHardy | 7750f40 | 2008-07-08 03:23:36 -0700 | [diff] [blame] | 133 | extern int __vlan_hwaccel_rx(struct sk_buff *skb, struct vlan_group *grp, |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 134 | u16 vlan_tci, int polling); |
Jiri Pirko | bcc6d47 | 2011-04-07 19:48:33 +0000 | [diff] [blame^] | 135 | extern bool vlan_do_receive(struct sk_buff **skb); |
| 136 | extern struct sk_buff *vlan_untag(struct sk_buff *skb); |
Ben Hutchings | c7c4b3b | 2009-10-29 21:36:53 -0700 | [diff] [blame] | 137 | extern gro_result_t |
| 138 | vlan_gro_receive(struct napi_struct *napi, struct vlan_group *grp, |
| 139 | unsigned int vlan_tci, struct sk_buff *skb); |
| 140 | extern gro_result_t |
| 141 | vlan_gro_frags(struct napi_struct *napi, struct vlan_group *grp, |
| 142 | unsigned int vlan_tci); |
Patrick McHardy | 9b22ea5 | 2008-11-04 14:49:57 -0800 | [diff] [blame] | 143 | |
Patrick McHardy | 7750f40 | 2008-07-08 03:23:36 -0700 | [diff] [blame] | 144 | #else |
Jesse Gross | 65ac6a5 | 2010-10-20 13:56:05 +0000 | [diff] [blame] | 145 | static inline struct net_device *vlan_find_dev(struct net_device *real_dev, |
| 146 | u16 vlan_id) |
| 147 | { |
| 148 | return NULL; |
| 149 | } |
| 150 | |
Patrick McHardy | 22d1ba7 | 2008-07-08 03:23:57 -0700 | [diff] [blame] | 151 | static inline struct net_device *vlan_dev_real_dev(const struct net_device *dev) |
| 152 | { |
| 153 | BUG(); |
| 154 | return NULL; |
| 155 | } |
| 156 | |
| 157 | static inline u16 vlan_dev_vlan_id(const struct net_device *dev) |
| 158 | { |
| 159 | BUG(); |
| 160 | return 0; |
| 161 | } |
| 162 | |
Patrick McHardy | 7750f40 | 2008-07-08 03:23:36 -0700 | [diff] [blame] | 163 | static inline int __vlan_hwaccel_rx(struct sk_buff *skb, struct vlan_group *grp, |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 164 | u16 vlan_tci, int polling) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | { |
Patrick McHardy | 7750f40 | 2008-07-08 03:23:36 -0700 | [diff] [blame] | 166 | BUG(); |
| 167 | return NET_XMIT_SUCCESS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | } |
Patrick McHardy | 9b22ea5 | 2008-11-04 14:49:57 -0800 | [diff] [blame] | 169 | |
Jiri Pirko | bcc6d47 | 2011-04-07 19:48:33 +0000 | [diff] [blame^] | 170 | static inline bool vlan_do_receive(struct sk_buff **skb) |
Patrick McHardy | 9b22ea5 | 2008-11-04 14:49:57 -0800 | [diff] [blame] | 171 | { |
Jesse Gross | 0988c4c | 2010-10-21 11:30:42 +0000 | [diff] [blame] | 172 | if ((*skb)->vlan_tci & VLAN_VID_MASK) |
| 173 | (*skb)->pkt_type = PACKET_OTHERHOST; |
Jesse Gross | 3701e51 | 2010-10-20 13:56:06 +0000 | [diff] [blame] | 174 | return false; |
Patrick McHardy | 9b22ea5 | 2008-11-04 14:49:57 -0800 | [diff] [blame] | 175 | } |
Herbert Xu | e1c096e | 2009-01-06 10:50:09 -0800 | [diff] [blame] | 176 | |
Jiri Pirko | bcc6d47 | 2011-04-07 19:48:33 +0000 | [diff] [blame^] | 177 | inline struct sk_buff *vlan_untag(struct sk_buff *skb) |
| 178 | { |
| 179 | return skb; |
| 180 | } |
| 181 | |
Ben Hutchings | c7c4b3b | 2009-10-29 21:36:53 -0700 | [diff] [blame] | 182 | static inline gro_result_t |
| 183 | vlan_gro_receive(struct napi_struct *napi, struct vlan_group *grp, |
| 184 | unsigned int vlan_tci, struct sk_buff *skb) |
Herbert Xu | e1c096e | 2009-01-06 10:50:09 -0800 | [diff] [blame] | 185 | { |
Ben Hutchings | c7c4b3b | 2009-10-29 21:36:53 -0700 | [diff] [blame] | 186 | return GRO_DROP; |
Herbert Xu | e1c096e | 2009-01-06 10:50:09 -0800 | [diff] [blame] | 187 | } |
| 188 | |
Ben Hutchings | c7c4b3b | 2009-10-29 21:36:53 -0700 | [diff] [blame] | 189 | static inline gro_result_t |
| 190 | vlan_gro_frags(struct napi_struct *napi, struct vlan_group *grp, |
| 191 | unsigned int vlan_tci) |
Herbert Xu | e1c096e | 2009-01-06 10:50:09 -0800 | [diff] [blame] | 192 | { |
Ben Hutchings | c7c4b3b | 2009-10-29 21:36:53 -0700 | [diff] [blame] | 193 | return GRO_DROP; |
Herbert Xu | e1c096e | 2009-01-06 10:50:09 -0800 | [diff] [blame] | 194 | } |
Patrick McHardy | 7750f40 | 2008-07-08 03:23:36 -0700 | [diff] [blame] | 195 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 197 | /** |
| 198 | * vlan_hwaccel_rx - netif_rx wrapper for VLAN RX acceleration |
| 199 | * @skb: buffer |
| 200 | * @grp: vlan group |
| 201 | * @vlan_tci: VLAN TCI as received from the card |
| 202 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | static inline int vlan_hwaccel_rx(struct sk_buff *skb, |
| 204 | struct vlan_group *grp, |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 205 | u16 vlan_tci) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | { |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 207 | return __vlan_hwaccel_rx(skb, grp, vlan_tci, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | } |
| 209 | |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 210 | /** |
| 211 | * vlan_hwaccel_receive_skb - netif_receive_skb wrapper for VLAN RX acceleration |
| 212 | * @skb: buffer |
| 213 | * @grp: vlan group |
| 214 | * @vlan_tci: VLAN TCI as received from the card |
| 215 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 216 | static inline int vlan_hwaccel_receive_skb(struct sk_buff *skb, |
| 217 | struct vlan_group *grp, |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 218 | u16 vlan_tci) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | { |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 220 | return __vlan_hwaccel_rx(skb, grp, vlan_tci, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | } |
| 222 | |
| 223 | /** |
| 224 | * __vlan_put_tag - regular VLAN tag inserting |
| 225 | * @skb: skbuff to tag |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 226 | * @vlan_tci: VLAN TCI to insert |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | * |
| 228 | * Inserts the VLAN tag into @skb as part of the payload |
| 229 | * Returns a VLAN tagged skb. If a new skb is created, @skb is freed. |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 230 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | * Following the skb_unshare() example, in case of error, the calling function |
| 232 | * doesn't have to worry about freeing the original skb. |
| 233 | */ |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 234 | static inline struct sk_buff *__vlan_put_tag(struct sk_buff *skb, u16 vlan_tci) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | { |
| 236 | struct vlan_ethhdr *veth; |
| 237 | |
Patrick McHardy | 11a100f | 2008-07-08 15:36:57 -0700 | [diff] [blame] | 238 | if (skb_cow_head(skb, VLAN_HLEN) < 0) { |
| 239 | kfree_skb(skb); |
| 240 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | veth = (struct vlan_ethhdr *)skb_push(skb, VLAN_HLEN); |
| 243 | |
| 244 | /* Move the mac addresses to the beginning of the new header. */ |
| 245 | memmove(skb->data, skb->data + VLAN_HLEN, 2 * VLAN_ETH_ALEN); |
Jarek Poplawski | e4dd618 | 2009-02-18 23:31:11 -0800 | [diff] [blame] | 246 | skb->mac_header -= VLAN_HLEN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | |
| 248 | /* first, the ethernet type */ |
Patrick McHardy | 57d3ae8 | 2008-01-21 00:26:25 -0800 | [diff] [blame] | 249 | veth->h_vlan_proto = htons(ETH_P_8021Q); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 251 | /* now, the TCI */ |
| 252 | veth->h_vlan_TCI = htons(vlan_tci); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | |
Patrick McHardy | 57d3ae8 | 2008-01-21 00:26:25 -0800 | [diff] [blame] | 254 | skb->protocol = htons(ETH_P_8021Q); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | |
| 256 | return skb; |
| 257 | } |
| 258 | |
| 259 | /** |
| 260 | * __vlan_hwaccel_put_tag - hardware accelerated VLAN inserting |
| 261 | * @skb: skbuff to tag |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 262 | * @vlan_tci: VLAN TCI to insert |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | * |
Patrick McHardy | 6aa895b0 | 2008-07-14 22:49:06 -0700 | [diff] [blame] | 264 | * Puts the VLAN TCI in @skb->vlan_tci and lets the device do the rest |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | */ |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 266 | static inline struct sk_buff *__vlan_hwaccel_put_tag(struct sk_buff *skb, |
| 267 | u16 vlan_tci) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | { |
Eric Dumazet | 05423b2 | 2009-10-26 18:40:35 -0700 | [diff] [blame] | 269 | skb->vlan_tci = VLAN_TAG_PRESENT | vlan_tci; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | return skb; |
| 271 | } |
| 272 | |
| 273 | #define HAVE_VLAN_PUT_TAG |
| 274 | |
| 275 | /** |
| 276 | * vlan_put_tag - inserts VLAN tag according to device features |
| 277 | * @skb: skbuff to tag |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 278 | * @vlan_tci: VLAN TCI to insert |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | * |
| 280 | * Assumes skb->dev is the target that will xmit this frame. |
| 281 | * Returns a VLAN tagged skb. |
| 282 | */ |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 283 | static inline struct sk_buff *vlan_put_tag(struct sk_buff *skb, u16 vlan_tci) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | { |
| 285 | if (skb->dev->features & NETIF_F_HW_VLAN_TX) { |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 286 | return __vlan_hwaccel_put_tag(skb, vlan_tci); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | } else { |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 288 | return __vlan_put_tag(skb, vlan_tci); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | } |
| 290 | } |
| 291 | |
| 292 | /** |
| 293 | * __vlan_get_tag - get the VLAN ID that is part of the payload |
| 294 | * @skb: skbuff to query |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 295 | * @vlan_tci: buffer to store vlaue |
| 296 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | * Returns error if the skb is not of VLAN type |
| 298 | */ |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 299 | static inline int __vlan_get_tag(const struct sk_buff *skb, u16 *vlan_tci) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | { |
| 301 | struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb->data; |
| 302 | |
Patrick McHardy | 57d3ae8 | 2008-01-21 00:26:25 -0800 | [diff] [blame] | 303 | if (veth->h_vlan_proto != htons(ETH_P_8021Q)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | return -EINVAL; |
| 305 | } |
| 306 | |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 307 | *vlan_tci = ntohs(veth->h_vlan_TCI); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | return 0; |
| 309 | } |
| 310 | |
| 311 | /** |
| 312 | * __vlan_hwaccel_get_tag - get the VLAN ID that is in @skb->cb[] |
| 313 | * @skb: skbuff to query |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 314 | * @vlan_tci: buffer to store vlaue |
| 315 | * |
Patrick McHardy | 6aa895b0 | 2008-07-14 22:49:06 -0700 | [diff] [blame] | 316 | * Returns error if @skb->vlan_tci is not set correctly |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 317 | */ |
Patrick McHardy | 1814993 | 2008-02-05 16:20:22 -0800 | [diff] [blame] | 318 | static inline int __vlan_hwaccel_get_tag(const struct sk_buff *skb, |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 319 | u16 *vlan_tci) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | { |
Patrick McHardy | 6aa895b0 | 2008-07-14 22:49:06 -0700 | [diff] [blame] | 321 | if (vlan_tx_tag_present(skb)) { |
Eric Dumazet | 05423b2 | 2009-10-26 18:40:35 -0700 | [diff] [blame] | 322 | *vlan_tci = vlan_tx_tag_get(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | return 0; |
| 324 | } else { |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 325 | *vlan_tci = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | return -EINVAL; |
| 327 | } |
| 328 | } |
| 329 | |
| 330 | #define HAVE_VLAN_GET_TAG |
| 331 | |
| 332 | /** |
| 333 | * vlan_get_tag - get the VLAN ID from the skb |
| 334 | * @skb: skbuff to query |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 335 | * @vlan_tci: buffer to store vlaue |
| 336 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | * Returns error if the skb is not VLAN tagged |
| 338 | */ |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 339 | static inline int vlan_get_tag(const struct sk_buff *skb, u16 *vlan_tci) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | { |
| 341 | if (skb->dev->features & NETIF_F_HW_VLAN_TX) { |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 342 | return __vlan_hwaccel_get_tag(skb, vlan_tci); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | } else { |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 344 | return __vlan_get_tag(skb, vlan_tci); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | } |
| 346 | } |
| 347 | |
Hao Zheng | 0a85df0 | 2010-11-11 13:47:57 +0000 | [diff] [blame] | 348 | /** |
| 349 | * vlan_get_protocol - get protocol EtherType. |
| 350 | * @skb: skbuff to query |
| 351 | * |
| 352 | * Returns the EtherType of the packet, regardless of whether it is |
| 353 | * vlan encapsulated (normal or hardware accelerated) or not. |
| 354 | */ |
| 355 | static inline __be16 vlan_get_protocol(const struct sk_buff *skb) |
| 356 | { |
| 357 | __be16 protocol = 0; |
| 358 | |
| 359 | if (vlan_tx_tag_present(skb) || |
| 360 | skb->protocol != cpu_to_be16(ETH_P_8021Q)) |
| 361 | protocol = skb->protocol; |
| 362 | else { |
| 363 | __be16 proto, *protop; |
| 364 | protop = skb_header_pointer(skb, offsetof(struct vlan_ethhdr, |
| 365 | h_vlan_encapsulated_proto), |
| 366 | sizeof(proto), &proto); |
| 367 | if (likely(protop)) |
| 368 | protocol = *protop; |
| 369 | } |
| 370 | |
| 371 | return protocol; |
| 372 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | #endif /* __KERNEL__ */ |
| 374 | |
| 375 | /* VLAN IOCTLs are found in sockios.h */ |
| 376 | |
| 377 | /* Passed in vlan_ioctl_args structure to determine behaviour. */ |
| 378 | enum vlan_ioctl_cmds { |
| 379 | ADD_VLAN_CMD, |
| 380 | DEL_VLAN_CMD, |
| 381 | SET_VLAN_INGRESS_PRIORITY_CMD, |
| 382 | SET_VLAN_EGRESS_PRIORITY_CMD, |
| 383 | GET_VLAN_INGRESS_PRIORITY_CMD, |
| 384 | GET_VLAN_EGRESS_PRIORITY_CMD, |
| 385 | SET_VLAN_NAME_TYPE_CMD, |
| 386 | SET_VLAN_FLAG_CMD, |
| 387 | GET_VLAN_REALDEV_NAME_CMD, /* If this works, you know it's a VLAN device, btw */ |
| 388 | GET_VLAN_VID_CMD /* Get the VID of this VLAN (specified by name) */ |
| 389 | }; |
| 390 | |
Patrick McHardy | a4bf3af4 | 2007-06-13 12:07:37 -0700 | [diff] [blame] | 391 | enum vlan_flags { |
| 392 | VLAN_FLAG_REORDER_HDR = 0x1, |
Patrick McHardy | 70c03b4 | 2008-07-05 21:26:57 -0700 | [diff] [blame] | 393 | VLAN_FLAG_GVRP = 0x2, |
Patrick McHardy | 5e75659 | 2009-11-25 07:54:54 +0000 | [diff] [blame] | 394 | VLAN_FLAG_LOOSE_BINDING = 0x4, |
Patrick McHardy | a4bf3af4 | 2007-06-13 12:07:37 -0700 | [diff] [blame] | 395 | }; |
| 396 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | enum vlan_name_types { |
| 398 | VLAN_NAME_TYPE_PLUS_VID, /* Name will look like: vlan0005 */ |
| 399 | VLAN_NAME_TYPE_RAW_PLUS_VID, /* name will look like: eth1.0005 */ |
| 400 | VLAN_NAME_TYPE_PLUS_VID_NO_PAD, /* Name will look like: vlan5 */ |
| 401 | VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD, /* Name will look like: eth0.5 */ |
| 402 | VLAN_NAME_TYPE_HIGHEST |
| 403 | }; |
| 404 | |
| 405 | struct vlan_ioctl_args { |
| 406 | int cmd; /* Should be one of the vlan_ioctl_cmds enum above. */ |
| 407 | char device1[24]; |
| 408 | |
| 409 | union { |
| 410 | char device2[24]; |
| 411 | int VID; |
| 412 | unsigned int skb_priority; |
| 413 | unsigned int name_type; |
| 414 | unsigned int bind_type; |
| 415 | unsigned int flag; /* Matches vlan_dev_info flags */ |
| 416 | } u; |
| 417 | |
| 418 | short vlan_qos; |
| 419 | }; |
| 420 | |
| 421 | #endif /* !(_LINUX_IF_VLAN_H_) */ |