mirror of
https://github.com/openvswitch/ovs
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72e8bf28bb
This patch adds support for skb mark matching and set action. Acked-by: Jesse Gross <jesse@nicira.com> Signed-off-by: Ansis Atteka <aatteka@nicira.com>
118 lines
3.0 KiB
C
118 lines
3.0 KiB
C
/*
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* Copyright (c) 2007-2012 Nicira, Inc.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of version 2 of the GNU General Public
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* License as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA
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*/
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#ifndef COMPAT_H
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#define COMPAT_H 1
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#include <linux/netlink.h>
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#ifndef HAVE_NLA_NUL_STRING
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static inline int CHECK_NUL_STRING(struct nlattr *attr, int maxlen)
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{
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char *s;
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int len;
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if (!attr)
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return 0;
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len = nla_len(attr);
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if (len >= maxlen)
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return -EINVAL;
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s = nla_data(attr);
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if (s[len - 1] != '\0')
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return -EINVAL;
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return 0;
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}
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#else
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static inline int CHECK_NUL_STRING(struct nlattr *attr, int maxlen)
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{
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return 0;
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}
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#endif /* !HAVE_NLA_NUL_STRING */
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static inline void skb_clear_rxhash(struct sk_buff *skb)
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{
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35)
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skb->rxhash = 0;
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#endif
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}
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/*
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* Enforces, mutual exclusion with the Linux bridge module, by declaring and
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* exporting br_should_route_hook. Because the bridge module also exports the
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* same symbol, the module loader will refuse to load both modules at the same
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* time (e.g. "bridge: exports duplicate symbol br_should_route_hook (owned by
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* openvswitch)").
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*
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* Before Linux 2.6.36, Open vSwitch cannot safely coexist with the Linux
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* bridge module, so openvswitch uses this macro in those versions. In
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* Linux 2.6.36 and later, Open vSwitch can coexist with the bridge module,
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* but it makes no sense to load both bridge and brcompat, so brcompat uses
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* this macro in those versions.
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*
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* The use of "typeof" here avoids the need to track changes in the type of
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* br_should_route_hook over various kernel versions.
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*/
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#define BRIDGE_MUTUAL_EXCLUSION \
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typeof(br_should_route_hook) br_should_route_hook; \
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EXPORT_SYMBOL(br_should_route_hook)
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#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,32)
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#define GENL_SOCK(net) (genl_sock)
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#define SET_NETNSOK
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#else
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#define GENL_SOCK(net) ((net)->genl_sock)
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#define SET_NETNSOK .netnsok = true,
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#endif
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#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20)
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#ifdef CONFIG_NETFILTER
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static inline u32 skb_get_mark(struct sk_buff *skb)
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{
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return skb->nfmark;
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}
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static inline void skb_set_mark(struct sk_buff *skb, u32 mark)
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{
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skb->nfmark = mark;
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}
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#else /* CONFIG_NETFILTER */
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static inline u32 skb_get_mark(struct sk_buff *skb)
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{
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return 0;
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}
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static inline void skb_set_mark(struct sk_buff *skb, u32 mark)
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{
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}
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#endif
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#else /* before 2.6.20 */
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static inline u32 skb_get_mark(struct sk_buff *skb)
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{
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return skb->mark;
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}
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static inline void skb_set_mark(struct sk_buff *skb, u32 mark)
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{
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skb->mark = mark;
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}
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#endif /* after 2.6.20 */
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#endif /* compat.h */
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