2 * Copyright (c) 2003-2004 Alan L. Cox <alc@cs.rice.edu>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
29 #ifndef _SYS_SF_BUF_H_
30 #define _SYS_SF_BUF_H_
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.
37 #define SFB_CATCH 1 /* Check signals if the allocation
39 #define SFB_CPUPRIVATE 2 /* Create a CPU private mapping. */
41 #define SFB_NOWAIT 4 /* Return NULL if all bufs are used. */
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 */
52 #include <machine/sf_buf.h>
53 #include <sys/systm.h>
54 #include <sys/counter.h>
55 struct mbuf; /* for sf_buf_mext() */
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)],\
61 #define SFSTAT_INC(name) SFSTAT_ADD(name, 1)
64 int sf_buf_mext(struct mbuf *mb, void *addr, void *args);
66 #endif /* !_SYS_SF_BUF_H_ */