mirror of
https://github.com/openvswitch/ovs
synced 2025-10-27 15:18:06 +00:00
0d03e51ca9
Signed-off-by: Joe Stringer <joestringer@nicira.com> Acked-by: Pravin B Shelar <pshelar@nicira.com>
104 lines
2.6 KiB
C
104 lines
2.6 KiB
C
#ifndef __NET_DST_WRAPPER_H
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#define __NET_DST_WRAPPER_H 1
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#include <linux/version.h>
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#include_next <net/dst.h>
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#if LINUX_VERSION_CODE < KERNEL_VERSION(3,3,0) && \
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LINUX_VERSION_CODE > KERNEL_VERSION(3,0,20)
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#define dst_get_neighbour_noref dst_get_neighbour
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#endif
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#ifndef HAVE_SKB_DST_ACCESSOR_FUNCS
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static inline void skb_dst_drop(struct sk_buff *skb)
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{
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if (skb->dst)
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dst_release(skb_dst(skb));
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skb->dst = NULL;
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}
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#endif
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#ifndef DST_OBSOLETE_NONE
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#define DST_OBSOLETE_NONE 0
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#endif
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#ifndef DST_NOCOUNT
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#define DST_NOCOUNT 0
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#endif
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#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,35)
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static inline void __skb_dst_copy(struct sk_buff *nskb, unsigned long refdst)
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{
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nskb->_skb_dst = refdst;
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dst_clone(skb_dst(nskb));
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}
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static inline void refdst_drop(unsigned long refdst) { }
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static inline void skb_dst_set_noref(struct sk_buff *skb,
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struct dst_entry *dst) { }
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static inline void dst_init_metrics(struct dst_entry *dst, const u32 *metrics,
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bool read_only) { }
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#elif LINUX_VERSION_CODE < KERNEL_VERSION(4,3,0)
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static inline void __skb_dst_copy(struct sk_buff *nskb, unsigned long refdst)
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{
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nskb->_skb_refdst = refdst;
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if (!(nskb->_skb_refdst & SKB_DST_NOREF))
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dst_clone(skb_dst(nskb));
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}
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#endif
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#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,37)
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static inline void dst_entries_add(struct dst_ops *ops, int count)
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{
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atomic_add(count, &ops->entries);
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}
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#endif
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#if LINUX_VERSION_CODE < KERNEL_VERSION(4,3,0)
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static const u32 rpl_dst_default_metrics[RTAX_MAX + 1] = {
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/* This initializer is needed to force linker to place this variable
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* into const section. Otherwise it might end into bss section.
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* We really want to avoid false sharing on this variable, and catch
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* any writes on it.
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*/
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[RTAX_MAX] = 0xdeadbeef,
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};
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#define dst_default_metrics rpl_dst_default_metrics
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static inline void rpl_dst_init(struct dst_entry *dst, struct dst_ops *ops,
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struct net_device *dev, int initial_ref,
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int initial_obsolete, unsigned short flags)
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{
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/* XXX: It's easier to handle compatibility by zeroing, as we can
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* refer to fewer fields. Do that here.
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*/
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memset(dst, 0, sizeof *dst);
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dst->dev = dev;
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if (dev)
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dev_hold(dev);
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dst->ops = ops;
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dst_init_metrics(dst, dst_default_metrics, true);
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dst->path = dst;
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dst->input = dst_discard;
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#ifndef HAVE_DST_DISCARD_SK
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dst->output = dst_discard;
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#else
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dst->output = dst_discard_sk;
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#endif
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dst->obsolete = initial_obsolete;
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atomic_set(&dst->__refcnt, initial_ref);
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dst->lastuse = jiffies;
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dst->flags = flags;
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if (!(flags & DST_NOCOUNT))
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dst_entries_add(ops, 1);
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}
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#define dst_init rpl_dst_init
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#endif
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#endif
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