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freebsd
GitHub Repository: freebsd/freebsd-src
 Path: blob/main/sys/net/bpf_zerocopy.h
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/*-

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 * SPDX-License-Identifier: BSD-2-Clause

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 *

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 * Copyright (c) 2007 Seccuris Inc.

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 * All rights reserved.

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 *

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 * This software was developed by Robert N. M. Watson under contract to

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 * Seccuris Inc.

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 *

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 * Redistribution and use in source and binary forms, with or without

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 * modification, are permitted provided that the following conditions

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 * are met:

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 * 1. Redistributions of source code must retain the above copyright

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 *    notice, this list of conditions and the following disclaimer.

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 * 2. Redistributions in binary form must reproduce the above copyright

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 *    notice, this list of conditions and the following disclaimer in the

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 *    documentation and/or other materials provided with the distribution.

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 *

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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND

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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE

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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

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 * SUCH DAMAGE.

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 */

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#ifndef _NET_BPF_ZEROCOPY_H_

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#define	_NET_BPF_ZEROCOPY_H_

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#ifndef _KERNEL

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#error "no user-serviceable parts inside"

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#endif

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void	bpf_zerocopy_append_bytes(struct bpf_d *d, caddr_t buf, u_int offset,

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	    void *src, u_int len);

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void	bpf_zerocopy_append_mbuf(struct bpf_d *d, caddr_t buf, u_int offset,

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	    void *src, u_int len);

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void	bpf_zerocopy_buffull(struct bpf_d *);

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void	bpf_zerocopy_bufheld(struct bpf_d *);

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void	bpf_zerocopy_buf_reclaimed(struct bpf_d *);

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int	bpf_zerocopy_canfreebuf(struct bpf_d *);

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int	bpf_zerocopy_canwritebuf(struct bpf_d *);

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void	bpf_zerocopy_free(struct bpf_d *d);

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int	bpf_zerocopy_ioctl_getzmax(struct thread *td, struct bpf_d *d,

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	    size_t *i);

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int	bpf_zerocopy_ioctl_rotzbuf(struct thread *td, struct bpf_d *d,

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	    struct bpf_zbuf *bz);

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int	bpf_zerocopy_ioctl_setzbuf(struct thread *td, struct bpf_d *d,

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	    struct bpf_zbuf *bz);

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#endif /* !_NET_BPF_ZEROCOPY_H_ */

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