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/*- * Copyright (c) 2003-2004 Alan L. Cox <alc@cs.rice.edu> * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * $FreeBSD: release/9.1.0/sys/sys/sf_buf.h 137372 2004-11-08 00:43:46Z alc $ */ #ifndef _SYS_SF_BUF_H_ #define _SYS_SF_BUF_H_ #include <machine/sf_buf.h> /* * Options to sf_buf_alloc() are specified through its flags argument. This * argument's value should be the result of a bitwise or'ing of one or more * of the following values. */ #define SFB_CATCH 1 /* Check signals if the allocation sleeps. */ #define SFB_CPUPRIVATE 2 /* Create a CPU private mapping. */ #define SFB_DEFAULT 0 #define SFB_NOWAIT 4 /* Return NULL if all bufs are used. */ struct vm_page; extern int nsfbufs; /* Number of sendfile(2) bufs alloced */ extern int nsfbufspeak; /* Peak of nsfbufsused */ extern int nsfbufsused; /* Number of sendfile(2) bufs in use */ struct sf_buf * sf_buf_alloc(struct vm_page *m, int flags); void sf_buf_free(struct sf_buf *sf); void sf_buf_mext(void *addr, void *args); #endif /* !_SYS_SF_BUF_H_ */