sf_buf.h revision 123931
1/*- 2 * Copyright (c) 2003 Alan L. Cox <alc@cs.rice.edu> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD: head/sys/sys/sf_buf.h 123931 2003-12-28 09:10:51Z silby $ 27 */ 28 29#ifndef _SYS_SF_BUF_H_ 30#define _SYS_SF_BUF_H_ 31 32#include <machine/sf_buf.h> 33 34struct vm_page; 35 36extern int nsfbufs; /* Number of sendfile(2) bufs alloced */ 37extern int nsfbufspeak; /* Peak of nsfbufsused */ 38extern int nsfbufsused; /* Number of sendfile(2) bufs in use */ 39 40struct sf_buf * 41 sf_buf_alloc(struct vm_page *m); 42void sf_buf_free(void *addr, void *args); 43 44#endif /* !_SYS_SF_BUF_H_ */ 45