sys/net/bpf_zerocopy.h

   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_ */