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Diffstat (limited to 'datapath/vlan.h')
-rw-r--r-- | datapath/vlan.h | 65 |
1 files changed, 0 insertions, 65 deletions
diff --git a/datapath/vlan.h b/datapath/vlan.h deleted file mode 100644 index 13ae6a7e3..000000000 --- a/datapath/vlan.h +++ /dev/null @@ -1,65 +0,0 @@ -/* - * Copyright (c) 2007-2011 Nicira, Inc. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of version 2 of the GNU General Public - * License as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA - */ - -#ifndef VLAN_H -#define VLAN_H 1 - -#include <linux/if_vlan.h> -#include <linux/skbuff.h> -#include <linux/version.h> - -/** - * DOC: VLAN tag manipulation. - * - * &struct sk_buff handling of VLAN tags has evolved over time: - * - * In 2.6.26 and earlier, VLAN tags did not have any generic representation in - * an skb, other than as a raw 802.1Q header inside the packet data. - * - * In 2.6.27 &struct sk_buff added a @vlan_tci member. Between 2.6.27 and - * 2.6.32, its value was the raw contents of the 802.1Q TCI field, or zero if - * no 802.1Q header was present. This worked OK except for the corner case of - * an 802.1Q header with an all-0-bits TCI, which could not be represented. - * - * In 2.6.33, @vlan_tci semantics changed. Now, if an 802.1Q header is - * present, then the VLAN_TAG_PRESENT bit is always set. This fixes the - * all-0-bits TCI corner case. - * - * For compatibility we emulate the 2.6.33+ behavior on earlier kernel - * versions. The client must not access @vlan_tci directly. Instead, use - * vlan_get_tci() to read it or vlan_set_tci() to write it, with semantics - * equivalent to those on 2.6.33+. - */ - -static inline u16 vlan_get_tci(struct sk_buff *skb) -{ -#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,33) - if (skb->vlan_tci) - return skb->vlan_tci | VLAN_TAG_PRESENT; -#endif - return skb->vlan_tci; -} - -static inline void vlan_set_tci(struct sk_buff *skb, u16 vlan_tci) -{ -#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,33) - vlan_tci &= ~VLAN_TAG_PRESENT; -#endif - skb->vlan_tci = vlan_tci; -} -#endif /* vlan.h */ |