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> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | |
| 20 | #define VLAN_HLEN 4 /* The additional bytes (on top of the Ethernet header) |
| 21 | * that VLAN requires. |
| 22 | */ |
| 23 | #define VLAN_ETH_ALEN 6 /* Octets in one ethernet addr */ |
| 24 | #define VLAN_ETH_HLEN 18 /* Total octets in header. */ |
| 25 | #define VLAN_ETH_ZLEN 64 /* Min. octets in frame sans FCS */ |
| 26 | |
| 27 | /* |
| 28 | * According to 802.3ac, the packet can be 4 bytes longer. --Klika Jan |
| 29 | */ |
| 30 | #define VLAN_ETH_DATA_LEN 1500 /* Max. octets in payload */ |
| 31 | #define VLAN_ETH_FRAME_LEN 1518 /* Max. octets in frame sans FCS */ |
| 32 | |
Patrick McHardy | 740c15d | 2008-01-21 00:18:53 -0800 | [diff] [blame] | 33 | /* |
| 34 | * struct vlan_hdr - vlan header |
| 35 | * @h_vlan_TCI: priority and VLAN ID |
| 36 | * @h_vlan_encapsulated_proto: packet type ID or len |
| 37 | */ |
| 38 | struct vlan_hdr { |
| 39 | __be16 h_vlan_TCI; |
| 40 | __be16 h_vlan_encapsulated_proto; |
| 41 | }; |
| 42 | |
| 43 | /** |
| 44 | * struct vlan_ethhdr - vlan ethernet header (ethhdr + vlan_hdr) |
| 45 | * @h_dest: destination ethernet address |
| 46 | * @h_source: source ethernet address |
| 47 | * @h_vlan_proto: ethernet protocol (always 0x8100) |
| 48 | * @h_vlan_TCI: priority and VLAN ID |
| 49 | * @h_vlan_encapsulated_proto: packet type ID or len |
| 50 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | struct vlan_ethhdr { |
Patrick McHardy | 740c15d | 2008-01-21 00:18:53 -0800 | [diff] [blame] | 52 | unsigned char h_dest[ETH_ALEN]; |
| 53 | unsigned char h_source[ETH_ALEN]; |
| 54 | __be16 h_vlan_proto; |
| 55 | __be16 h_vlan_TCI; |
| 56 | __be16 h_vlan_encapsulated_proto; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | }; |
| 58 | |
| 59 | #include <linux/skbuff.h> |
| 60 | |
| 61 | static inline struct vlan_ethhdr *vlan_eth_hdr(const struct sk_buff *skb) |
| 62 | { |
Arnaldo Carvalho de Melo | 98e399f | 2007-03-19 15:33:04 -0700 | [diff] [blame] | 63 | return (struct vlan_ethhdr *)skb_mac_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | } |
| 65 | |
Eric Dumazet | 05423b2 | 2009-10-26 18:40:35 -0700 | [diff] [blame] | 66 | #define VLAN_PRIO_MASK 0xe000 /* Priority Code Point */ |
| 67 | #define VLAN_PRIO_SHIFT 13 |
| 68 | #define VLAN_CFI_MASK 0x1000 /* Canonical Format Indicator */ |
| 69 | #define VLAN_TAG_PRESENT VLAN_CFI_MASK |
| 70 | #define VLAN_VID_MASK 0x0fff /* VLAN Identifier */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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; |
Eric Dumazet | 63c8099 | 2009-10-27 07:06:49 +0000 | [diff] [blame] | 88 | int killall; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | struct hlist_node hlist; /* linked list */ |
Dan Aloni | 5c15bde | 2007-03-02 20:44:51 -0800 | [diff] [blame] | 90 | struct net_device **vlan_devices_arrays[VLAN_GROUP_ARRAY_SPLIT_PARTS]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | struct rcu_head rcu; |
| 92 | }; |
| 93 | |
Eric Dumazet | f0b5a0d | 2008-01-08 23:54:43 -0800 | [diff] [blame] | 94 | 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] | 95 | u16 vlan_id) |
Dan Aloni | 5c15bde | 2007-03-02 20:44:51 -0800 | [diff] [blame] | 96 | { |
| 97 | struct net_device **array; |
| 98 | array = vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN]; |
Pavel Emelyanov | 6772718 | 2008-03-26 16:27:22 -0700 | [diff] [blame] | 99 | return array ? array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN] : NULL; |
Dan Aloni | 5c15bde | 2007-03-02 20:44:51 -0800 | [diff] [blame] | 100 | } |
| 101 | |
Eric Dumazet | f0b5a0d | 2008-01-08 23:54:43 -0800 | [diff] [blame] | 102 | static inline void vlan_group_set_device(struct vlan_group *vg, |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 103 | u16 vlan_id, |
Dan Aloni | 5c15bde | 2007-03-02 20:44:51 -0800 | [diff] [blame] | 104 | struct net_device *dev) |
| 105 | { |
| 106 | struct net_device **array; |
| 107 | if (!vg) |
| 108 | return; |
| 109 | array = vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN]; |
| 110 | array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN] = dev; |
| 111 | } |
| 112 | |
Eric Dumazet | 05423b2 | 2009-10-26 18:40:35 -0700 | [diff] [blame] | 113 | #define vlan_tx_tag_present(__skb) ((__skb)->vlan_tci & VLAN_TAG_PRESENT) |
| 114 | #define vlan_tx_tag_get(__skb) ((__skb)->vlan_tci & ~VLAN_TAG_PRESENT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | |
Patrick McHardy | 7750f40 | 2008-07-08 03:23:36 -0700 | [diff] [blame] | 116 | #if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE) |
Patrick McHardy | 22d1ba7 | 2008-07-08 03:23:57 -0700 | [diff] [blame] | 117 | extern struct net_device *vlan_dev_real_dev(const struct net_device *dev); |
| 118 | extern u16 vlan_dev_vlan_id(const struct net_device *dev); |
| 119 | |
Patrick McHardy | 7750f40 | 2008-07-08 03:23:36 -0700 | [diff] [blame] | 120 | 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] | 121 | u16 vlan_tci, int polling); |
Patrick McHardy | 9b22ea5 | 2008-11-04 14:49:57 -0800 | [diff] [blame] | 122 | extern int vlan_hwaccel_do_receive(struct sk_buff *skb); |
Ben Hutchings | c7c4b3b | 2009-10-29 21:36:53 -0700 | [diff] [blame] | 123 | extern gro_result_t |
| 124 | vlan_gro_receive(struct napi_struct *napi, struct vlan_group *grp, |
| 125 | unsigned int vlan_tci, struct sk_buff *skb); |
| 126 | extern gro_result_t |
| 127 | vlan_gro_frags(struct napi_struct *napi, struct vlan_group *grp, |
| 128 | unsigned int vlan_tci); |
Patrick McHardy | 9b22ea5 | 2008-11-04 14:49:57 -0800 | [diff] [blame] | 129 | |
Patrick McHardy | 7750f40 | 2008-07-08 03:23:36 -0700 | [diff] [blame] | 130 | #else |
Patrick McHardy | 22d1ba7 | 2008-07-08 03:23:57 -0700 | [diff] [blame] | 131 | static inline struct net_device *vlan_dev_real_dev(const struct net_device *dev) |
| 132 | { |
| 133 | BUG(); |
| 134 | return NULL; |
| 135 | } |
| 136 | |
| 137 | static inline u16 vlan_dev_vlan_id(const struct net_device *dev) |
| 138 | { |
| 139 | BUG(); |
| 140 | return 0; |
| 141 | } |
| 142 | |
Patrick McHardy | 7750f40 | 2008-07-08 03:23:36 -0700 | [diff] [blame] | 143 | 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] | 144 | u16 vlan_tci, int polling) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | { |
Patrick McHardy | 7750f40 | 2008-07-08 03:23:36 -0700 | [diff] [blame] | 146 | BUG(); |
| 147 | return NET_XMIT_SUCCESS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | } |
Patrick McHardy | 9b22ea5 | 2008-11-04 14:49:57 -0800 | [diff] [blame] | 149 | |
| 150 | static inline int vlan_hwaccel_do_receive(struct sk_buff *skb) |
| 151 | { |
| 152 | return 0; |
| 153 | } |
Herbert Xu | e1c096e | 2009-01-06 10:50:09 -0800 | [diff] [blame] | 154 | |
Ben Hutchings | c7c4b3b | 2009-10-29 21:36:53 -0700 | [diff] [blame] | 155 | static inline gro_result_t |
| 156 | vlan_gro_receive(struct napi_struct *napi, struct vlan_group *grp, |
| 157 | unsigned int vlan_tci, struct sk_buff *skb) |
Herbert Xu | e1c096e | 2009-01-06 10:50:09 -0800 | [diff] [blame] | 158 | { |
Ben Hutchings | c7c4b3b | 2009-10-29 21:36:53 -0700 | [diff] [blame] | 159 | return GRO_DROP; |
Herbert Xu | e1c096e | 2009-01-06 10:50:09 -0800 | [diff] [blame] | 160 | } |
| 161 | |
Ben Hutchings | c7c4b3b | 2009-10-29 21:36:53 -0700 | [diff] [blame] | 162 | static inline gro_result_t |
| 163 | vlan_gro_frags(struct napi_struct *napi, struct vlan_group *grp, |
| 164 | unsigned int vlan_tci) |
Herbert Xu | e1c096e | 2009-01-06 10:50:09 -0800 | [diff] [blame] | 165 | { |
Ben Hutchings | c7c4b3b | 2009-10-29 21:36:53 -0700 | [diff] [blame] | 166 | return GRO_DROP; |
Herbert Xu | e1c096e | 2009-01-06 10:50:09 -0800 | [diff] [blame] | 167 | } |
Patrick McHardy | 7750f40 | 2008-07-08 03:23:36 -0700 | [diff] [blame] | 168 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 170 | /** |
| 171 | * vlan_hwaccel_rx - netif_rx wrapper for VLAN RX acceleration |
| 172 | * @skb: buffer |
| 173 | * @grp: vlan group |
| 174 | * @vlan_tci: VLAN TCI as received from the card |
| 175 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | static inline int vlan_hwaccel_rx(struct sk_buff *skb, |
| 177 | struct vlan_group *grp, |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 178 | u16 vlan_tci) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | { |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 180 | return __vlan_hwaccel_rx(skb, grp, vlan_tci, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | } |
| 182 | |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 183 | /** |
| 184 | * vlan_hwaccel_receive_skb - netif_receive_skb wrapper for VLAN RX acceleration |
| 185 | * @skb: buffer |
| 186 | * @grp: vlan group |
| 187 | * @vlan_tci: VLAN TCI as received from the card |
| 188 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | static inline int vlan_hwaccel_receive_skb(struct sk_buff *skb, |
| 190 | struct vlan_group *grp, |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 191 | u16 vlan_tci) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | { |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 193 | return __vlan_hwaccel_rx(skb, grp, vlan_tci, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | } |
| 195 | |
| 196 | /** |
| 197 | * __vlan_put_tag - regular VLAN tag inserting |
| 198 | * @skb: skbuff to tag |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 199 | * @vlan_tci: VLAN TCI to insert |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | * |
| 201 | * Inserts the VLAN tag into @skb as part of the payload |
| 202 | * 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] | 203 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | * Following the skb_unshare() example, in case of error, the calling function |
| 205 | * doesn't have to worry about freeing the original skb. |
| 206 | */ |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 207 | 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] | 208 | { |
| 209 | struct vlan_ethhdr *veth; |
| 210 | |
Patrick McHardy | 11a100f | 2008-07-08 15:36:57 -0700 | [diff] [blame] | 211 | if (skb_cow_head(skb, VLAN_HLEN) < 0) { |
| 212 | kfree_skb(skb); |
| 213 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | veth = (struct vlan_ethhdr *)skb_push(skb, VLAN_HLEN); |
| 216 | |
| 217 | /* Move the mac addresses to the beginning of the new header. */ |
| 218 | memmove(skb->data, skb->data + VLAN_HLEN, 2 * VLAN_ETH_ALEN); |
Jarek Poplawski | e4dd618 | 2009-02-18 23:31:11 -0800 | [diff] [blame] | 219 | skb->mac_header -= VLAN_HLEN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | |
| 221 | /* first, the ethernet type */ |
Patrick McHardy | 57d3ae8 | 2008-01-21 00:26:25 -0800 | [diff] [blame] | 222 | veth->h_vlan_proto = htons(ETH_P_8021Q); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 224 | /* now, the TCI */ |
| 225 | veth->h_vlan_TCI = htons(vlan_tci); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | |
Patrick McHardy | 57d3ae8 | 2008-01-21 00:26:25 -0800 | [diff] [blame] | 227 | skb->protocol = htons(ETH_P_8021Q); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | |
| 229 | return skb; |
| 230 | } |
| 231 | |
| 232 | /** |
| 233 | * __vlan_hwaccel_put_tag - hardware accelerated VLAN inserting |
| 234 | * @skb: skbuff to tag |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 235 | * @vlan_tci: VLAN TCI to insert |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | * |
Patrick McHardy | 6aa895b0 | 2008-07-14 22:49:06 -0700 | [diff] [blame] | 237 | * 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] | 238 | */ |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 239 | static inline struct sk_buff *__vlan_hwaccel_put_tag(struct sk_buff *skb, |
| 240 | u16 vlan_tci) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | { |
Eric Dumazet | 05423b2 | 2009-10-26 18:40:35 -0700 | [diff] [blame] | 242 | skb->vlan_tci = VLAN_TAG_PRESENT | vlan_tci; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | return skb; |
| 244 | } |
| 245 | |
| 246 | #define HAVE_VLAN_PUT_TAG |
| 247 | |
| 248 | /** |
| 249 | * vlan_put_tag - inserts VLAN tag according to device features |
| 250 | * @skb: skbuff to tag |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 251 | * @vlan_tci: VLAN TCI to insert |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | * |
| 253 | * Assumes skb->dev is the target that will xmit this frame. |
| 254 | * Returns a VLAN tagged skb. |
| 255 | */ |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 256 | 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] | 257 | { |
| 258 | if (skb->dev->features & NETIF_F_HW_VLAN_TX) { |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 259 | return __vlan_hwaccel_put_tag(skb, vlan_tci); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | } else { |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 261 | return __vlan_put_tag(skb, vlan_tci); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | } |
| 263 | } |
| 264 | |
| 265 | /** |
| 266 | * __vlan_get_tag - get the VLAN ID that is part of the payload |
| 267 | * @skb: skbuff to query |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 268 | * @vlan_tci: buffer to store vlaue |
| 269 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | * Returns error if the skb is not of VLAN type |
| 271 | */ |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 272 | 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] | 273 | { |
| 274 | struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb->data; |
| 275 | |
Patrick McHardy | 57d3ae8 | 2008-01-21 00:26:25 -0800 | [diff] [blame] | 276 | if (veth->h_vlan_proto != htons(ETH_P_8021Q)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | return -EINVAL; |
| 278 | } |
| 279 | |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 280 | *vlan_tci = ntohs(veth->h_vlan_TCI); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | return 0; |
| 282 | } |
| 283 | |
| 284 | /** |
| 285 | * __vlan_hwaccel_get_tag - get the VLAN ID that is in @skb->cb[] |
| 286 | * @skb: skbuff to query |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 287 | * @vlan_tci: buffer to store vlaue |
| 288 | * |
Patrick McHardy | 6aa895b0 | 2008-07-14 22:49:06 -0700 | [diff] [blame] | 289 | * Returns error if @skb->vlan_tci is not set correctly |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | */ |
Patrick McHardy | 1814993 | 2008-02-05 16:20:22 -0800 | [diff] [blame] | 291 | static inline int __vlan_hwaccel_get_tag(const struct sk_buff *skb, |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 292 | u16 *vlan_tci) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | { |
Patrick McHardy | 6aa895b0 | 2008-07-14 22:49:06 -0700 | [diff] [blame] | 294 | if (vlan_tx_tag_present(skb)) { |
Eric Dumazet | 05423b2 | 2009-10-26 18:40:35 -0700 | [diff] [blame] | 295 | *vlan_tci = vlan_tx_tag_get(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | return 0; |
| 297 | } else { |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 298 | *vlan_tci = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | return -EINVAL; |
| 300 | } |
| 301 | } |
| 302 | |
| 303 | #define HAVE_VLAN_GET_TAG |
| 304 | |
| 305 | /** |
| 306 | * vlan_get_tag - get the VLAN ID from the skb |
| 307 | * @skb: skbuff to query |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 308 | * @vlan_tci: buffer to store vlaue |
| 309 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | * Returns error if the skb is not VLAN tagged |
| 311 | */ |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 312 | 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] | 313 | { |
| 314 | if (skb->dev->features & NETIF_F_HW_VLAN_TX) { |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 315 | return __vlan_hwaccel_get_tag(skb, vlan_tci); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | } else { |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 317 | return __vlan_get_tag(skb, vlan_tci); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | } |
| 319 | } |
| 320 | |
| 321 | #endif /* __KERNEL__ */ |
| 322 | |
| 323 | /* VLAN IOCTLs are found in sockios.h */ |
| 324 | |
| 325 | /* Passed in vlan_ioctl_args structure to determine behaviour. */ |
| 326 | enum vlan_ioctl_cmds { |
| 327 | ADD_VLAN_CMD, |
| 328 | DEL_VLAN_CMD, |
| 329 | SET_VLAN_INGRESS_PRIORITY_CMD, |
| 330 | SET_VLAN_EGRESS_PRIORITY_CMD, |
| 331 | GET_VLAN_INGRESS_PRIORITY_CMD, |
| 332 | GET_VLAN_EGRESS_PRIORITY_CMD, |
| 333 | SET_VLAN_NAME_TYPE_CMD, |
| 334 | SET_VLAN_FLAG_CMD, |
| 335 | GET_VLAN_REALDEV_NAME_CMD, /* If this works, you know it's a VLAN device, btw */ |
| 336 | GET_VLAN_VID_CMD /* Get the VID of this VLAN (specified by name) */ |
| 337 | }; |
| 338 | |
Patrick McHardy | a4bf3af4 | 2007-06-13 12:07:37 -0700 | [diff] [blame] | 339 | enum vlan_flags { |
| 340 | VLAN_FLAG_REORDER_HDR = 0x1, |
Patrick McHardy | 70c03b4 | 2008-07-05 21:26:57 -0700 | [diff] [blame] | 341 | VLAN_FLAG_GVRP = 0x2, |
Patrick McHardy | 5e75659 | 2009-11-25 07:54:54 +0000 | [diff] [blame^] | 342 | VLAN_FLAG_LOOSE_BINDING = 0x4, |
Patrick McHardy | a4bf3af4 | 2007-06-13 12:07:37 -0700 | [diff] [blame] | 343 | }; |
| 344 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | enum vlan_name_types { |
| 346 | VLAN_NAME_TYPE_PLUS_VID, /* Name will look like: vlan0005 */ |
| 347 | VLAN_NAME_TYPE_RAW_PLUS_VID, /* name will look like: eth1.0005 */ |
| 348 | VLAN_NAME_TYPE_PLUS_VID_NO_PAD, /* Name will look like: vlan5 */ |
| 349 | VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD, /* Name will look like: eth0.5 */ |
| 350 | VLAN_NAME_TYPE_HIGHEST |
| 351 | }; |
| 352 | |
| 353 | struct vlan_ioctl_args { |
| 354 | int cmd; /* Should be one of the vlan_ioctl_cmds enum above. */ |
| 355 | char device1[24]; |
| 356 | |
| 357 | union { |
| 358 | char device2[24]; |
| 359 | int VID; |
| 360 | unsigned int skb_priority; |
| 361 | unsigned int name_type; |
| 362 | unsigned int bind_type; |
| 363 | unsigned int flag; /* Matches vlan_dev_info flags */ |
| 364 | } u; |
| 365 | |
| 366 | short vlan_qos; |
| 367 | }; |
| 368 | |
| 369 | #endif /* !(_LINUX_IF_VLAN_H_) */ |