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__ |
| 17 | |
| 18 | /* externally defined structs */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | struct hlist_node; |
| 20 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | #include <linux/netdevice.h> |
Stephen Hemminger | 0610d11 | 2006-07-14 16:34:22 -0700 | [diff] [blame] | 22 | #include <linux/etherdevice.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | |
| 24 | #define VLAN_HLEN 4 /* The additional bytes (on top of the Ethernet header) |
| 25 | * that VLAN requires. |
| 26 | */ |
| 27 | #define VLAN_ETH_ALEN 6 /* Octets in one ethernet addr */ |
| 28 | #define VLAN_ETH_HLEN 18 /* Total octets in header. */ |
| 29 | #define VLAN_ETH_ZLEN 64 /* Min. octets in frame sans FCS */ |
| 30 | |
| 31 | /* |
| 32 | * According to 802.3ac, the packet can be 4 bytes longer. --Klika Jan |
| 33 | */ |
| 34 | #define VLAN_ETH_DATA_LEN 1500 /* Max. octets in payload */ |
| 35 | #define VLAN_ETH_FRAME_LEN 1518 /* Max. octets in frame sans FCS */ |
| 36 | |
Patrick McHardy | 740c15d | 2008-01-21 00:18:53 -0800 | [diff] [blame] | 37 | /* |
| 38 | * struct vlan_hdr - vlan header |
| 39 | * @h_vlan_TCI: priority and VLAN ID |
| 40 | * @h_vlan_encapsulated_proto: packet type ID or len |
| 41 | */ |
| 42 | struct vlan_hdr { |
| 43 | __be16 h_vlan_TCI; |
| 44 | __be16 h_vlan_encapsulated_proto; |
| 45 | }; |
| 46 | |
| 47 | /** |
| 48 | * struct vlan_ethhdr - vlan ethernet header (ethhdr + vlan_hdr) |
| 49 | * @h_dest: destination ethernet address |
| 50 | * @h_source: source ethernet address |
| 51 | * @h_vlan_proto: ethernet protocol (always 0x8100) |
| 52 | * @h_vlan_TCI: priority and VLAN ID |
| 53 | * @h_vlan_encapsulated_proto: packet type ID or len |
| 54 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | struct vlan_ethhdr { |
Patrick McHardy | 740c15d | 2008-01-21 00:18:53 -0800 | [diff] [blame] | 56 | unsigned char h_dest[ETH_ALEN]; |
| 57 | unsigned char h_source[ETH_ALEN]; |
| 58 | __be16 h_vlan_proto; |
| 59 | __be16 h_vlan_TCI; |
| 60 | __be16 h_vlan_encapsulated_proto; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | }; |
| 62 | |
| 63 | #include <linux/skbuff.h> |
| 64 | |
| 65 | static inline struct vlan_ethhdr *vlan_eth_hdr(const struct sk_buff *skb) |
| 66 | { |
Arnaldo Carvalho de Melo | 98e399f | 2007-03-19 15:33:04 -0700 | [diff] [blame] | 67 | return (struct vlan_ethhdr *)skb_mac_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | } |
| 69 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | #define VLAN_VID_MASK 0xfff |
| 71 | |
| 72 | /* found in socket.c */ |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 73 | extern void vlan_ioctl_set(int (*hook)(struct net *, void __user *)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | /* if this changes, algorithm will have to be reworked because this |
| 76 | * depends on completely exhausting the VLAN identifier space. Thus |
| 77 | * it gives constant time look-up, but in many cases it wastes memory. |
| 78 | */ |
Dan Aloni | 5c15bde | 2007-03-02 20:44:51 -0800 | [diff] [blame] | 79 | #define VLAN_GROUP_ARRAY_LEN 4096 |
| 80 | #define VLAN_GROUP_ARRAY_SPLIT_PARTS 8 |
| 81 | #define VLAN_GROUP_ARRAY_PART_LEN (VLAN_GROUP_ARRAY_LEN/VLAN_GROUP_ARRAY_SPLIT_PARTS) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | |
| 83 | struct vlan_group { |
Pavel Emelyanov | a9fde26 | 2008-04-16 00:48:04 -0700 | [diff] [blame^] | 84 | struct net_device *real_dev; /* The ethernet(like) device |
| 85 | * the vlan is attached to. |
| 86 | */ |
Patrick McHardy | af30151 | 2008-01-21 00:25:50 -0800 | [diff] [blame] | 87 | unsigned int nr_vlans; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | struct hlist_node hlist; /* linked list */ |
Dan Aloni | 5c15bde | 2007-03-02 20:44:51 -0800 | [diff] [blame] | 89 | struct net_device **vlan_devices_arrays[VLAN_GROUP_ARRAY_SPLIT_PARTS]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | struct rcu_head rcu; |
| 91 | }; |
| 92 | |
Eric Dumazet | f0b5a0d | 2008-01-08 23:54:43 -0800 | [diff] [blame] | 93 | static inline struct net_device *vlan_group_get_device(struct vlan_group *vg, |
| 94 | unsigned int vlan_id) |
Dan Aloni | 5c15bde | 2007-03-02 20:44:51 -0800 | [diff] [blame] | 95 | { |
| 96 | struct net_device **array; |
| 97 | array = vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN]; |
Pavel Emelyanov | 6772718 | 2008-03-26 16:27:22 -0700 | [diff] [blame] | 98 | return array ? array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN] : NULL; |
Dan Aloni | 5c15bde | 2007-03-02 20:44:51 -0800 | [diff] [blame] | 99 | } |
| 100 | |
Eric Dumazet | f0b5a0d | 2008-01-08 23:54:43 -0800 | [diff] [blame] | 101 | static inline void vlan_group_set_device(struct vlan_group *vg, |
| 102 | unsigned int vlan_id, |
Dan Aloni | 5c15bde | 2007-03-02 20:44:51 -0800 | [diff] [blame] | 103 | struct net_device *dev) |
| 104 | { |
| 105 | struct net_device **array; |
| 106 | if (!vg) |
| 107 | return; |
| 108 | array = vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN]; |
| 109 | array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN] = dev; |
| 110 | } |
| 111 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | struct vlan_priority_tci_mapping { |
Patrick McHardy | 734423c | 2007-06-13 12:07:07 -0700 | [diff] [blame] | 113 | u32 priority; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | unsigned short vlan_qos; /* This should be shifted when first set, so we only do it |
| 115 | * at provisioning time. |
| 116 | * ((skb->priority << 13) & 0xE000) |
| 117 | */ |
| 118 | struct vlan_priority_tci_mapping *next; |
| 119 | }; |
| 120 | |
| 121 | /* Holds information that makes sense if this device is a VLAN device. */ |
| 122 | struct vlan_dev_info { |
| 123 | /** This will be the mapping that correlates skb->priority to |
| 124 | * 3 bits of VLAN QOS tags... |
| 125 | */ |
Patrick McHardy | b020cb4 | 2007-06-13 12:07:22 -0700 | [diff] [blame] | 126 | unsigned int nr_ingress_mappings; |
Patrick McHardy | 734423c | 2007-06-13 12:07:07 -0700 | [diff] [blame] | 127 | u32 ingress_priority_map[8]; |
Patrick McHardy | b020cb4 | 2007-06-13 12:07:22 -0700 | [diff] [blame] | 128 | |
| 129 | unsigned int nr_egress_mappings; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | struct vlan_priority_tci_mapping *egress_priority_map[16]; /* hash table */ |
| 131 | |
| 132 | unsigned short vlan_id; /* The VLAN Identifier for this interface. */ |
| 133 | unsigned short flags; /* (1 << 0) re_order_header This option will cause the |
| 134 | * VLAN code to move around the ethernet header on |
| 135 | * ingress to make the skb look **exactly** like it |
| 136 | * came in from an ethernet port. This destroys some of |
| 137 | * the VLAN information in the skb, but it fixes programs |
| 138 | * like DHCP that use packet-filtering and don't understand |
| 139 | * 802.1Q |
| 140 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | struct net_device *real_dev; /* the underlying device/interface */ |
Patrick McHardy | 8c979c2 | 2007-07-11 19:45:24 -0700 | [diff] [blame] | 142 | unsigned char real_dev_addr[ETH_ALEN]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | struct proc_dir_entry *dent; /* Holds the proc data */ |
| 144 | unsigned long cnt_inc_headroom_on_tx; /* How many times did we have to grow the skb on TX. */ |
| 145 | unsigned long cnt_encap_on_xmit; /* How many times did we have to encapsulate the skb on TX. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | }; |
| 147 | |
Patrick McHardy | 9dfebcc | 2008-01-21 00:26:07 -0800 | [diff] [blame] | 148 | static inline struct vlan_dev_info *vlan_dev_info(const struct net_device *dev) |
| 149 | { |
| 150 | return netdev_priv(dev); |
| 151 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | |
| 153 | /* inline functions */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | static inline __u32 vlan_get_ingress_priority(struct net_device *dev, |
| 155 | unsigned short vlan_tag) |
| 156 | { |
Patrick McHardy | 9dfebcc | 2008-01-21 00:26:07 -0800 | [diff] [blame] | 157 | struct vlan_dev_info *vip = vlan_dev_info(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | |
| 159 | return vip->ingress_priority_map[(vlan_tag >> 13) & 0x7]; |
| 160 | } |
| 161 | |
| 162 | /* VLAN tx hw acceleration helpers. */ |
| 163 | struct vlan_skb_tx_cookie { |
| 164 | u32 magic; |
| 165 | u32 vlan_tag; |
| 166 | }; |
| 167 | |
| 168 | #define VLAN_TX_COOKIE_MAGIC 0x564c414e /* "VLAN" in ascii. */ |
| 169 | #define VLAN_TX_SKB_CB(__skb) ((struct vlan_skb_tx_cookie *)&((__skb)->cb[0])) |
| 170 | #define vlan_tx_tag_present(__skb) \ |
| 171 | (VLAN_TX_SKB_CB(__skb)->magic == VLAN_TX_COOKIE_MAGIC) |
| 172 | #define vlan_tx_tag_get(__skb) (VLAN_TX_SKB_CB(__skb)->vlan_tag) |
| 173 | |
| 174 | /* VLAN rx hw acceleration helper. This acts like netif_{rx,receive_skb}(). */ |
| 175 | static inline int __vlan_hwaccel_rx(struct sk_buff *skb, |
| 176 | struct vlan_group *grp, |
| 177 | unsigned short vlan_tag, int polling) |
| 178 | { |
| 179 | struct net_device_stats *stats; |
| 180 | |
David S. Miller | 7ea49ed | 2006-08-14 17:08:36 -0700 | [diff] [blame] | 181 | if (skb_bond_should_drop(skb)) { |
| 182 | dev_kfree_skb_any(skb); |
| 183 | return NET_RX_DROP; |
| 184 | } |
| 185 | |
Dan Aloni | 5c15bde | 2007-03-02 20:44:51 -0800 | [diff] [blame] | 186 | skb->dev = vlan_group_get_device(grp, vlan_tag & VLAN_VID_MASK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | if (skb->dev == NULL) { |
| 188 | dev_kfree_skb_any(skb); |
| 189 | |
| 190 | /* Not NET_RX_DROP, this is not being dropped |
| 191 | * due to congestion. |
| 192 | */ |
| 193 | return 0; |
| 194 | } |
| 195 | |
| 196 | skb->dev->last_rx = jiffies; |
| 197 | |
Patrick McHardy | 7bd38d7 | 2008-01-21 00:19:31 -0800 | [diff] [blame] | 198 | stats = &skb->dev->stats; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | stats->rx_packets++; |
| 200 | stats->rx_bytes += skb->len; |
| 201 | |
| 202 | skb->priority = vlan_get_ingress_priority(skb->dev, vlan_tag); |
| 203 | switch (skb->pkt_type) { |
| 204 | case PACKET_BROADCAST: |
| 205 | break; |
| 206 | |
| 207 | case PACKET_MULTICAST: |
| 208 | stats->multicast++; |
| 209 | break; |
| 210 | |
| 211 | case PACKET_OTHERHOST: |
| 212 | /* Our lower layer thinks this is not local, let's make sure. |
| 213 | * This allows the VLAN to have a different MAC than the underlying |
| 214 | * device, and still route correctly. |
| 215 | */ |
Stephen Hemminger | 0610d11 | 2006-07-14 16:34:22 -0700 | [diff] [blame] | 216 | if (!compare_ether_addr(eth_hdr(skb)->h_dest, |
| 217 | skb->dev->dev_addr)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | skb->pkt_type = PACKET_HOST; |
| 219 | break; |
| 220 | }; |
| 221 | |
| 222 | return (polling ? netif_receive_skb(skb) : netif_rx(skb)); |
| 223 | } |
| 224 | |
| 225 | static inline int vlan_hwaccel_rx(struct sk_buff *skb, |
| 226 | struct vlan_group *grp, |
| 227 | unsigned short vlan_tag) |
| 228 | { |
| 229 | return __vlan_hwaccel_rx(skb, grp, vlan_tag, 0); |
| 230 | } |
| 231 | |
| 232 | static inline int vlan_hwaccel_receive_skb(struct sk_buff *skb, |
| 233 | struct vlan_group *grp, |
| 234 | unsigned short vlan_tag) |
| 235 | { |
| 236 | return __vlan_hwaccel_rx(skb, grp, vlan_tag, 1); |
| 237 | } |
| 238 | |
| 239 | /** |
| 240 | * __vlan_put_tag - regular VLAN tag inserting |
| 241 | * @skb: skbuff to tag |
| 242 | * @tag: VLAN tag to insert |
| 243 | * |
| 244 | * Inserts the VLAN tag into @skb as part of the payload |
| 245 | * Returns a VLAN tagged skb. If a new skb is created, @skb is freed. |
| 246 | * |
| 247 | * Following the skb_unshare() example, in case of error, the calling function |
| 248 | * doesn't have to worry about freeing the original skb. |
| 249 | */ |
| 250 | static inline struct sk_buff *__vlan_put_tag(struct sk_buff *skb, unsigned short tag) |
| 251 | { |
| 252 | struct vlan_ethhdr *veth; |
| 253 | |
| 254 | if (skb_headroom(skb) < VLAN_HLEN) { |
| 255 | struct sk_buff *sk_tmp = skb; |
| 256 | skb = skb_realloc_headroom(sk_tmp, VLAN_HLEN); |
| 257 | kfree_skb(sk_tmp); |
| 258 | if (!skb) { |
| 259 | printk(KERN_ERR "vlan: failed to realloc headroom\n"); |
| 260 | return NULL; |
| 261 | } |
| 262 | } else { |
| 263 | skb = skb_unshare(skb, GFP_ATOMIC); |
| 264 | if (!skb) { |
| 265 | printk(KERN_ERR "vlan: failed to unshare skbuff\n"); |
| 266 | return NULL; |
| 267 | } |
| 268 | } |
| 269 | |
| 270 | veth = (struct vlan_ethhdr *)skb_push(skb, VLAN_HLEN); |
| 271 | |
| 272 | /* Move the mac addresses to the beginning of the new header. */ |
| 273 | memmove(skb->data, skb->data + VLAN_HLEN, 2 * VLAN_ETH_ALEN); |
| 274 | |
| 275 | /* first, the ethernet type */ |
Patrick McHardy | 57d3ae8 | 2008-01-21 00:26:25 -0800 | [diff] [blame] | 276 | veth->h_vlan_proto = htons(ETH_P_8021Q); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | |
| 278 | /* now, the tag */ |
| 279 | veth->h_vlan_TCI = htons(tag); |
| 280 | |
Patrick McHardy | 57d3ae8 | 2008-01-21 00:26:25 -0800 | [diff] [blame] | 281 | skb->protocol = htons(ETH_P_8021Q); |
Arnaldo Carvalho de Melo | b0e380b | 2007-04-10 21:21:55 -0700 | [diff] [blame] | 282 | skb->mac_header -= VLAN_HLEN; |
| 283 | skb->network_header -= VLAN_HLEN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | |
| 285 | return skb; |
| 286 | } |
| 287 | |
| 288 | /** |
| 289 | * __vlan_hwaccel_put_tag - hardware accelerated VLAN inserting |
| 290 | * @skb: skbuff to tag |
| 291 | * @tag: VLAN tag to insert |
| 292 | * |
| 293 | * Puts the VLAN tag in @skb->cb[] and lets the device do the rest |
| 294 | */ |
| 295 | static inline struct sk_buff *__vlan_hwaccel_put_tag(struct sk_buff *skb, unsigned short tag) |
| 296 | { |
| 297 | struct vlan_skb_tx_cookie *cookie; |
| 298 | |
| 299 | cookie = VLAN_TX_SKB_CB(skb); |
| 300 | cookie->magic = VLAN_TX_COOKIE_MAGIC; |
| 301 | cookie->vlan_tag = tag; |
| 302 | |
| 303 | return skb; |
| 304 | } |
| 305 | |
| 306 | #define HAVE_VLAN_PUT_TAG |
| 307 | |
| 308 | /** |
| 309 | * vlan_put_tag - inserts VLAN tag according to device features |
| 310 | * @skb: skbuff to tag |
| 311 | * @tag: VLAN tag to insert |
| 312 | * |
| 313 | * Assumes skb->dev is the target that will xmit this frame. |
| 314 | * Returns a VLAN tagged skb. |
| 315 | */ |
| 316 | static inline struct sk_buff *vlan_put_tag(struct sk_buff *skb, unsigned short tag) |
| 317 | { |
| 318 | if (skb->dev->features & NETIF_F_HW_VLAN_TX) { |
| 319 | return __vlan_hwaccel_put_tag(skb, tag); |
| 320 | } else { |
| 321 | return __vlan_put_tag(skb, tag); |
| 322 | } |
| 323 | } |
| 324 | |
| 325 | /** |
| 326 | * __vlan_get_tag - get the VLAN ID that is part of the payload |
| 327 | * @skb: skbuff to query |
| 328 | * @tag: buffer to store vlaue |
| 329 | * |
| 330 | * Returns error if the skb is not of VLAN type |
| 331 | */ |
Patrick McHardy | 1814993 | 2008-02-05 16:20:22 -0800 | [diff] [blame] | 332 | static inline int __vlan_get_tag(const struct sk_buff *skb, unsigned short *tag) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | { |
| 334 | struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb->data; |
| 335 | |
Patrick McHardy | 57d3ae8 | 2008-01-21 00:26:25 -0800 | [diff] [blame] | 336 | if (veth->h_vlan_proto != htons(ETH_P_8021Q)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | return -EINVAL; |
| 338 | } |
| 339 | |
| 340 | *tag = ntohs(veth->h_vlan_TCI); |
| 341 | |
| 342 | return 0; |
| 343 | } |
| 344 | |
| 345 | /** |
| 346 | * __vlan_hwaccel_get_tag - get the VLAN ID that is in @skb->cb[] |
| 347 | * @skb: skbuff to query |
| 348 | * @tag: buffer to store vlaue |
| 349 | * |
| 350 | * Returns error if @skb->cb[] is not set correctly |
| 351 | */ |
Patrick McHardy | 1814993 | 2008-02-05 16:20:22 -0800 | [diff] [blame] | 352 | static inline int __vlan_hwaccel_get_tag(const struct sk_buff *skb, |
| 353 | unsigned short *tag) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | { |
| 355 | struct vlan_skb_tx_cookie *cookie; |
| 356 | |
| 357 | cookie = VLAN_TX_SKB_CB(skb); |
| 358 | if (cookie->magic == VLAN_TX_COOKIE_MAGIC) { |
| 359 | *tag = cookie->vlan_tag; |
| 360 | return 0; |
| 361 | } else { |
| 362 | *tag = 0; |
| 363 | return -EINVAL; |
| 364 | } |
| 365 | } |
| 366 | |
| 367 | #define HAVE_VLAN_GET_TAG |
| 368 | |
| 369 | /** |
| 370 | * vlan_get_tag - get the VLAN ID from the skb |
| 371 | * @skb: skbuff to query |
| 372 | * @tag: buffer to store vlaue |
| 373 | * |
| 374 | * Returns error if the skb is not VLAN tagged |
| 375 | */ |
Patrick McHardy | 1814993 | 2008-02-05 16:20:22 -0800 | [diff] [blame] | 376 | static inline int vlan_get_tag(const struct sk_buff *skb, unsigned short *tag) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | { |
| 378 | if (skb->dev->features & NETIF_F_HW_VLAN_TX) { |
| 379 | return __vlan_hwaccel_get_tag(skb, tag); |
| 380 | } else { |
| 381 | return __vlan_get_tag(skb, tag); |
| 382 | } |
| 383 | } |
| 384 | |
| 385 | #endif /* __KERNEL__ */ |
| 386 | |
| 387 | /* VLAN IOCTLs are found in sockios.h */ |
| 388 | |
| 389 | /* Passed in vlan_ioctl_args structure to determine behaviour. */ |
| 390 | enum vlan_ioctl_cmds { |
| 391 | ADD_VLAN_CMD, |
| 392 | DEL_VLAN_CMD, |
| 393 | SET_VLAN_INGRESS_PRIORITY_CMD, |
| 394 | SET_VLAN_EGRESS_PRIORITY_CMD, |
| 395 | GET_VLAN_INGRESS_PRIORITY_CMD, |
| 396 | GET_VLAN_EGRESS_PRIORITY_CMD, |
| 397 | SET_VLAN_NAME_TYPE_CMD, |
| 398 | SET_VLAN_FLAG_CMD, |
| 399 | GET_VLAN_REALDEV_NAME_CMD, /* If this works, you know it's a VLAN device, btw */ |
| 400 | GET_VLAN_VID_CMD /* Get the VID of this VLAN (specified by name) */ |
| 401 | }; |
| 402 | |
Patrick McHardy | a4bf3af4 | 2007-06-13 12:07:37 -0700 | [diff] [blame] | 403 | enum vlan_flags { |
| 404 | VLAN_FLAG_REORDER_HDR = 0x1, |
| 405 | }; |
| 406 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | enum vlan_name_types { |
| 408 | VLAN_NAME_TYPE_PLUS_VID, /* Name will look like: vlan0005 */ |
| 409 | VLAN_NAME_TYPE_RAW_PLUS_VID, /* name will look like: eth1.0005 */ |
| 410 | VLAN_NAME_TYPE_PLUS_VID_NO_PAD, /* Name will look like: vlan5 */ |
| 411 | VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD, /* Name will look like: eth0.5 */ |
| 412 | VLAN_NAME_TYPE_HIGHEST |
| 413 | }; |
| 414 | |
| 415 | struct vlan_ioctl_args { |
| 416 | int cmd; /* Should be one of the vlan_ioctl_cmds enum above. */ |
| 417 | char device1[24]; |
| 418 | |
| 419 | union { |
| 420 | char device2[24]; |
| 421 | int VID; |
| 422 | unsigned int skb_priority; |
| 423 | unsigned int name_type; |
| 424 | unsigned int bind_type; |
| 425 | unsigned int flag; /* Matches vlan_dev_info flags */ |
| 426 | } u; |
| 427 | |
| 428 | short vlan_qos; |
| 429 | }; |
| 430 | |
| 431 | #endif /* !(_LINUX_IF_VLAN_H_) */ |