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net: filter: move load_pointer() into filter.h

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load_pointer() is already a static inline function.
Let's move it into filter.h so BPF JIT implementations can reuse this
function.

Since we're exporting this function, let's also rename it to
bpf_load_pointer() for clarity.

Signed-off-by: Zi Shen Lim <zlim.lnx@gmail.com>
Reviewed-by: Daniel Borkmann <dborkman@redhat.com>
Acked-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Zi Shen Lim
2014-07-03 07:56:54 -07:00
committed by David S. Miller
parent 3d5baba0ec
commit 9f12fbe603
2 changed files with 16 additions and 12 deletions
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13
include/linux/filter.h
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@@ -6,6 +6,7 @@
#include <linux/atomic.h>
#include <linux/compat.h>
#include <linux/skbuff.h>
#include <linux/workqueue.h>
#include <uapi/linux/filter.h>
@@ -406,6 +407,18 @@ static inline u16 bpf_anc_helper(const struct sock_filter *ftest)
}
}
void *bpf_internal_load_pointer_neg_helper(const struct sk_buff *skb,
int k, unsigned int size);
static inline void *bpf_load_pointer(const struct sk_buff *skb, int k,
unsigned int size, void *buffer)
{
if (k >= 0)
return skb_header_pointer(skb, k, size, buffer);
return bpf_internal_load_pointer_neg_helper(skb, k, size);
}
#ifdef CONFIG_BPF_JIT
#include <stdarg.h>
#include <linux/linkage.h>