2 * Linux Socket Filter Data Structures
4 #ifndef __LINUX_FILTER_H__
5 #define __LINUX_FILTER_H__
7 #include <linux/atomic.h>
8 #include <linux/compat.h>
9 #include <uapi/linux/filter.h>
13 * A struct sock_filter is architecture independent.
15 struct compat_sock_fprog
{
17 compat_uptr_t filter
; /* struct sock_filter * */
27 unsigned int len
; /* Number of filter blocks */
28 unsigned int (*bpf_func
)(const struct sk_buff
*skb
,
29 const struct sock_filter
*filter
);
31 struct sock_filter insns
[0];
34 static inline unsigned int sk_filter_len(const struct sk_filter
*fp
)
36 return fp
->len
* sizeof(struct sock_filter
) + sizeof(*fp
);
39 extern int sk_filter(struct sock
*sk
, struct sk_buff
*skb
);
40 extern unsigned int sk_run_filter(const struct sk_buff
*skb
,
41 const struct sock_filter
*filter
);
42 extern int sk_unattached_filter_create(struct sk_filter
**pfp
,
43 struct sock_fprog
*fprog
);
44 extern void sk_unattached_filter_destroy(struct sk_filter
*fp
);
45 extern int sk_attach_filter(struct sock_fprog
*fprog
, struct sock
*sk
);
46 extern int sk_detach_filter(struct sock
*sk
);
47 extern int sk_chk_filter(struct sock_filter
*filter
, unsigned int flen
);
48 extern int sk_get_filter(struct sock
*sk
, struct sock_filter __user
*filter
, unsigned len
);
51 extern void bpf_jit_compile(struct sk_filter
*fp
);
52 extern void bpf_jit_free(struct sk_filter
*fp
);
53 #define SK_RUN_FILTER(FILTER, SKB) (*FILTER->bpf_func)(SKB, FILTER->insns)
55 static inline void bpf_jit_compile(struct sk_filter
*fp
)
58 static inline void bpf_jit_free(struct sk_filter
*fp
)
61 #define SK_RUN_FILTER(FILTER, SKB) sk_run_filter(SKB, FILTER->insns)
119 BPF_S_ANC_NLATTR_NEST
,
126 BPF_S_ANC_SECCOMP_LD_W
,
128 BPF_S_ANC_VLAN_TAG_PRESENT
,
131 #endif /* __LINUX_FILTER_H__ */