mirror of
https://github.com/openvswitch/ovs
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6c5d24afea
Signed-off-by: Pravin B Shelar <pshelar@nicira.com> Acked-by: Jesse Gross <jesse@nicira.com>
159 lines
3.5 KiB
C
159 lines
3.5 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/in.h>
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#include <linux/in_route.h>
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#include <linux/netlink.h>
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#include <net/route.h>
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#include <net/xfrm.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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#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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#ifdef HAVE_PARALLEL_OPS
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#define SET_PARALLEL_OPS .parallel_ops = true,
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#else
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#define SET_PARALLEL_OPS
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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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#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,36)
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#define rt_dst(rt) (rt->dst)
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#else
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#define rt_dst(rt) (rt->u.dst)
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#endif
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#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,33)
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#define inet_sport(sk) (inet_sk(sk)->sport)
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#else
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#define inet_sport(sk) (inet_sk(sk)->inet_sport)
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#endif
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static inline struct rtable *find_route(struct net *net,
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__be32 *saddr, __be32 daddr,
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u8 ipproto, u8 tos, u32 skb_mark)
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{
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struct rtable *rt;
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/* Tunnel configuration keeps DSCP part of TOS bits, But Linux
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* router expect RT_TOS bits only. */
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#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,39)
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struct flowi fl = { .nl_u = { .ip4_u = {
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.daddr = daddr,
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.saddr = *saddr,
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#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20)
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.fwmark = skb_mark,
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#endif
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.tos = RT_TOS(tos) } },
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20)
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.mark = skb_mark,
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#endif
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.proto = ipproto };
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if (unlikely(ip_route_output_key(net, &rt, &fl)))
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return ERR_PTR(-EADDRNOTAVAIL);
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*saddr = fl.nl_u.ip4_u.saddr;
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return rt;
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#else
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struct flowi4 fl = { .daddr = daddr,
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.saddr = *saddr,
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.flowi4_tos = RT_TOS(tos),
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.flowi4_mark = skb_mark,
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.flowi4_proto = ipproto };
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rt = ip_route_output_key(net, &fl);
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*saddr = fl.saddr;
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return rt;
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#endif
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}
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#endif /* compat.h */
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