1 /* 2 * Copyright (c) 2003 Alan L. Cox <alc@cs.rice.edu>. All rights reserved. 3 * Copyright (c) 1998 David Greenman. 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 * $DragonFly: src/sys/sys/sfbuf.h,v 1.9 2006/05/20 02:42:13 dillon Exp $ 27 */ 28 29 #ifndef _SFBUF_H_ 30 #define _SFBUF_H_ 31 32 #ifndef _SYS_TYPES_H_ 33 #include <sys/types.h> 34 #endif 35 #ifndef _SYS_QUEUE_H_ 36 #include <sys/queue.h> 37 #endif 38 #ifndef _CPU_LWBUF_H_ 39 #include <cpu/lwbuf.h> 40 #endif 41 #ifndef _SYS_REF_H 42 #include <sys/ref.h> 43 #endif 44 45 #if !defined(_KERNEL) && !defined(_KERNEL_STRUCTURES) 46 #error "This file should not be included by userland programs." 47 #endif 48 49 struct sf_buf { 50 struct lwbuf *lwbuf; /* lightweight buffer */ 51 struct kref ref; 52 }; 53 54 #define sf_buf_kva(sf) (lwbuf_kva((sf)->lwbuf)) 55 #define sf_buf_page(sf) (lwbuf_page((sf)->lwbuf)) 56 57 58 #if defined(_KERNEL) 59 60 struct sf_buf *sf_buf_alloc(struct vm_page *); 61 void sf_buf_ref(void *); 62 int sf_buf_free(void *); 63 64 #endif 65 66 #endif 67