Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/sys/mchain.h
Version:
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1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2000, 2001 Boris Popov 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD: releng/12.0/sys/sys/mchain.h 326256 2017-11-27 15:01:59Z pfg $ 29 */ 30 #ifndef _SYS_MCHAIN_H_ 31 #define _SYS_MCHAIN_H_ 32 33 #ifdef _KERNEL 34 35 /* 36 * Type of copy for mb_{put|get}_mem() 37 */ 38 #define MB_MSYSTEM 0 /* use bcopy() */ 39 #define MB_MUSER 1 /* use copyin()/copyout() */ 40 #define MB_MINLINE 2 /* use an inline copy loop */ 41 #define MB_MZERO 3 /* bzero(), mb_put_mem only */ 42 #define MB_MCUSTOM 4 /* use an user defined function */ 43 44 struct mbuf; 45 struct mbchain; 46 47 typedef int mb_copy_t(struct mbchain *mbp, c_caddr_t src, caddr_t dst, 48 size_t *srclen, size_t *dstlen); 49 50 struct mbchain { 51 struct mbuf * mb_top; /* head of mbufs chain */ 52 struct mbuf * mb_cur; /* current mbuf */ 53 int mb_mleft; /* free space in the current mbuf */ 54 int mb_count; /* total number of bytes */ 55 mb_copy_t * mb_copy; /* user defined copy function */ 56 void * mb_udata; /* user data */ 57 }; 58 59 struct mdchain { 60 struct mbuf * md_top; /* head of mbufs chain */ 61 struct mbuf * md_cur; /* current mbuf */ 62 u_char * md_pos; /* offset in the current mbuf */ 63 }; 64 65 int mb_init(struct mbchain *mbp); 66 void mb_initm(struct mbchain *mbp, struct mbuf *m); 67 void mb_done(struct mbchain *mbp); 68 struct mbuf *mb_detach(struct mbchain *mbp); 69 int mb_fixhdr(struct mbchain *mbp); 70 caddr_t mb_reserve(struct mbchain *mbp, int size); 71 72 int mb_put_padbyte(struct mbchain *mbp); 73 int mb_put_uint8(struct mbchain *mbp, u_int8_t x); 74 int mb_put_uint16be(struct mbchain *mbp, u_int16_t x); 75 int mb_put_uint16le(struct mbchain *mbp, u_int16_t x); 76 int mb_put_uint32be(struct mbchain *mbp, u_int32_t x); 77 int mb_put_uint32le(struct mbchain *mbp, u_int32_t x); 78 int mb_put_int64be(struct mbchain *mbp, int64_t x); 79 int mb_put_int64le(struct mbchain *mbp, int64_t x); 80 int mb_put_mem(struct mbchain *mbp, c_caddr_t source, int size, int type); 81 int mb_put_mbuf(struct mbchain *mbp, struct mbuf *m); 82 int mb_put_uio(struct mbchain *mbp, struct uio *uiop, int size); 83 84 int md_init(struct mdchain *mdp); 85 void md_initm(struct mdchain *mbp, struct mbuf *m); 86 void md_done(struct mdchain *mdp); 87 void md_append_record(struct mdchain *mdp, struct mbuf *top); 88 int md_next_record(struct mdchain *mdp); 89 int md_get_uint8(struct mdchain *mdp, u_int8_t *x); 90 int md_get_uint16(struct mdchain *mdp, u_int16_t *x); 91 int md_get_uint16le(struct mdchain *mdp, u_int16_t *x); 92 int md_get_uint16be(struct mdchain *mdp, u_int16_t *x); 93 int md_get_uint32(struct mdchain *mdp, u_int32_t *x); 94 int md_get_uint32be(struct mdchain *mdp, u_int32_t *x); 95 int md_get_uint32le(struct mdchain *mdp, u_int32_t *x); 96 int md_get_int64(struct mdchain *mdp, int64_t *x); 97 int md_get_int64be(struct mdchain *mdp, int64_t *x); 98 int md_get_int64le(struct mdchain *mdp, int64_t *x); 99 int md_get_mem(struct mdchain *mdp, caddr_t target, int size, int type); 100 int md_get_mbuf(struct mdchain *mdp, int size, struct mbuf **m); 101 int md_get_uio(struct mdchain *mdp, struct uio *uiop, int size); 102 103 #endif /* ifdef _KERNEL */ 104 105 #endif /* !_SYS_MCHAIN_H_ */
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