mirror of
https://github.com/openvswitch/ovs
synced 2025-08-23 02:17:42 +00:00
cb25142c50
Add support for building the in-tree kernel datapath for Linux kernels up to 3.13. There were some changes in the netlink area which required adding new compatibility code for this layer. Also, some new per-cpu stats initialization code was added. Based on patch from Kyle Mestery. Signed-off-by: Kyle Mestery <mestery@noironetworks.com> Signed-off-by: Pravin B Shelar <pshelar@nicira.com> Acked-by: Kyle Mestery <mestery@noironetworks.com>
64 lines
1.5 KiB
C
64 lines
1.5 KiB
C
#include <linux/module.h>
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#include <linux/jiffies.h>
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#include <linux/kernel.h>
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#include <linux/ctype.h>
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#include <linux/inet.h>
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#include <linux/mm.h>
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#include <linux/net.h>
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#include <net/checksum.h>
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#include <net/ip.h>
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#include <linux/string.h>
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#include <linux/types.h>
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#include <linux/percpu.h>
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#include <linux/init.h>
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#include <linux/ratelimit.h>
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#include <net/sock.h>
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#include <asm/byteorder.h>
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#include <asm/uaccess.h>
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#if LINUX_VERSION_CODE < KERNEL_VERSION(3,7,0)
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void inet_proto_csum_replace16(__sum16 *sum, struct sk_buff *skb,
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const __be32 *from, const __be32 *to,
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int pseudohdr)
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{
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__be32 diff[] = {
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~from[0], ~from[1], ~from[2], ~from[3],
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to[0], to[1], to[2], to[3],
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};
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if (skb->ip_summed != CHECKSUM_PARTIAL) {
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*sum = csum_fold(csum_partial(diff, sizeof(diff),
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~csum_unfold(*sum)));
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if (skb->ip_summed == CHECKSUM_COMPLETE && pseudohdr)
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skb->csum = ~csum_partial(diff, sizeof(diff),
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~skb->csum);
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} else if (pseudohdr)
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*sum = ~csum_fold(csum_partial(diff, sizeof(diff),
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csum_unfold(*sum)));
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}
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#endif
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#if LINUX_VERSION_CODE < KERNEL_VERSION(3,13,0)
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bool __net_get_random_once(void *buf, int nbytes, bool *done,
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atomic_t *done_key)
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{
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static DEFINE_SPINLOCK(lock);
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unsigned long flags;
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spin_lock_irqsave(&lock, flags);
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if (*done) {
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spin_unlock_irqrestore(&lock, flags);
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return false;
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}
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get_random_bytes(buf, nbytes);
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*done = true;
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spin_unlock_irqrestore(&lock, flags);
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atomic_set(done_key, 1);
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return true;
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}
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#endif
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