xref: /freebsd/sys/net/bpf_zerocopy.h (revision 313376588638950ba1e93c403dd8c97bc52fd3a2)
1 /*-
2  * Copyright (c) 2007 Seccuris Inc.
3  * All rights reserved.
4  *
5  * This software was developed by Robert N. M. Watson under contract to
6  * Seccuris Inc.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  * 1. Redistributions of source code must retain the above copyright
12  *    notice, this list of conditions and the following disclaimer.
13  * 2. Redistributions in binary form must reproduce the above copyright
14  *    notice, this list of conditions and the following disclaimer in the
15  *    documentation and/or other materials provided with the distribution.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27  * SUCH DAMAGE.
28  *
29  * $FreeBSD$
30  */
31 
32 #ifndef _NET_BPF_ZEROCOPY_H_
33 #define	_NET_BPF_ZEROCOPY_H_
34 
35 #ifndef _KERNEL
36 #error "no user-serviceable parts inside"
37 #endif
38 
39 void	bpf_zerocopy_append_bytes(struct bpf_d *d, caddr_t buf, u_int offset,
40 	    void *src, u_int len);
41 void	bpf_zerocopy_append_mbuf(struct bpf_d *d, caddr_t buf, u_int offset,
42 	    void *src, u_int len);
43 void	bpf_zerocopy_buffull(struct bpf_d *);
44 void	bpf_zerocopy_bufheld(struct bpf_d *);
45 void	bpf_zerocopy_buf_reclaimed(struct bpf_d *);
46 int	bpf_zerocopy_canfreebuf(struct bpf_d *);
47 int	bpf_zerocopy_canwritebuf(struct bpf_d *);
48 void	bpf_zerocopy_free(struct bpf_d *d);
49 int	bpf_zerocopy_ioctl_getzmax(struct thread *td, struct bpf_d *d,
50 	    size_t *i);
51 int	bpf_zerocopy_ioctl_rotzbuf(struct thread *td, struct bpf_d *d,
52 	    struct bpf_zbuf *bz);
53 int	bpf_zerocopy_ioctl_setzbuf(struct thread *td, struct bpf_d *d,
54 	    struct bpf_zbuf *bz);
55 
56 #endif /* !_NET_BPF_ZEROCOPY_H_ */
57