1 /*- 2 * Copyright (c) 2003-2004 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 * $FreeBSD$ 27 */ 28 29 #ifndef _SYS_SF_BUF_H_ 30 #define _SYS_SF_BUF_H_ 31 32 /* 33 * Options to sf_buf_alloc() are specified through its flags argument. This 34 * argument's value should be the result of a bitwise or'ing of one or more 35 * of the following values. 36 */ 37 #define SFB_CATCH 1 /* Check signals if the allocation 38 sleeps. */ 39 #define SFB_CPUPRIVATE 2 /* Create a CPU private mapping. */ 40 #define SFB_DEFAULT 0 41 #define SFB_NOWAIT 4 /* Return NULL if all bufs are used. */ 42 43 struct vm_page; 44 45 struct sfstat { /* sendfile statistics */ 46 uint64_t sf_iocnt; /* times sendfile had to do disk I/O */ 47 uint64_t sf_allocfail; /* times sfbuf allocation failed */ 48 uint64_t sf_allocwait; /* times sfbuf allocation had to wait */ 49 }; 50 51 #ifdef _KERNEL 52 #include <machine/sf_buf.h> 53 #include <sys/systm.h> 54 #include <sys/counter.h> 55 struct mbuf; /* for sf_buf_mext() */ 56 57 extern counter_u64_t sfstat[sizeof(struct sfstat) / sizeof(uint64_t)]; 58 #define SFSTAT_ADD(name, val) \ 59 counter_u64_add(sfstat[offsetof(struct sfstat, name) / sizeof(uint64_t)],\ 60 (val)) 61 #define SFSTAT_INC(name) SFSTAT_ADD(name, 1) 62 #endif /* _KERNEL */ 63 64 int sf_buf_mext(struct mbuf *mb, void *addr, void *args); 65 66 #endif /* !_SYS_SF_BUF_H_ */ 67