The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/net/bpf_zerocopy.h

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    1 /*-
    2  * Copyright (c) 2007 Seccuris Inc.
    3  * All rights reserved.
    4  *
    5  * This sofware 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: releng/8.1/sys/net/bpf_zerocopy.h 180310 2008-07-05 20:11:28Z csjp $
   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_ */

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