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Fix FREESCALE_EDMA_NBYTES_MLOFFYES_MLOFF() so it works with negative offsets.
author vae
date Wed, 29 Apr 2015 23:31:48 +0000
parents 74dbf4c3f2e1
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 //==========================================================================
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2 //
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3 // include/sys/mbuf.h
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4 //
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5 //==========================================================================
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6 // ####BSDCOPYRIGHTBEGIN####
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7 // -------------------------------------------
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8 // This file is part of eCos, the Embedded Configurable Operating System.
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9 //
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10 // Portions of this software may have been derived from FreeBSD
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11 // or other sources, and if so are covered by the appropriate copyright
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12 // and license included herein.
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13 //
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14 // Portions created by the Free Software Foundation are
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15 // Copyright (C) 2002 Free Software Foundation, Inc.
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16 // -------------------------------------------
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17 // ####BSDCOPYRIGHTEND####
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18 //==========================================================================
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19
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20 /*
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21 * Copyright (c) 1982, 1986, 1988, 1993
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22 * The Regents of the University of California. All rights reserved.
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23 *
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24 * Redistribution and use in source and binary forms, with or without
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25 * modification, are permitted provided that the following conditions
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26 * are met:
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27 * 1. Redistributions of source code must retain the above copyright
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28 * notice, this list of conditions and the following disclaimer.
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29 * 2. Redistributions in binary form must reproduce the above copyright
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30 * notice, this list of conditions and the following disclaimer in the
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31 * documentation and/or other materials provided with the distribution.
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32 * 3. All advertising materials mentioning features or use of this software
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33 * must display the following acknowledgement:
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34 * This product includes software developed by the University of
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35 * California, Berkeley and its contributors.
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36 * 4. Neither the name of the University nor the names of its contributors
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37 * may be used to endorse or promote products derived from this software
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38 * without specific prior written permission.
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39 *
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40 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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43 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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50 * SUCH DAMAGE.
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51 *
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52 * @(#)mbuf.h 8.5 (Berkeley) 2/19/95
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53 * $FreeBSD: src/sys/sys/mbuf.h,v 1.44.2.10 2001/07/03 11:02:01 ume Exp $
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54 */
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55
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56 #ifndef _SYS_MBUF_H_
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57 #define _SYS_MBUF_H_
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58
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59 /*
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60 * Mbufs are of a single size, MSIZE (machine/param.h), which
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61 * includes overhead. An mbuf may add a single "mbuf cluster" of size
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62 * MCLBYTES (also in machine/param.h), which has no additional overhead
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63 * and is used instead of the internal data area; this is done when
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64 * at least MINCLSIZE of data must be stored.
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65 */
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66
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67 #define MLEN (MSIZE - sizeof(struct m_hdr)) /* normal data len */
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68 #define MHLEN (MLEN - sizeof(struct pkthdr)) /* data len w/pkthdr */
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69
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70 #define MINCLSIZE (MHLEN + 1) /* smallest amount to put in cluster */
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71 #define M_MAXCOMPRESS (MHLEN / 2) /* max amount to copy for compression */
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72
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73 /*
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74 * Macros for type conversion
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75 * mtod(m, t) - convert mbuf pointer to data pointer of correct type
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76 * dtom(x) - convert data pointer within mbuf to mbuf pointer (XXX)
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77 * mtocl(x) - convert pointer within cluster to cluster index #
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78 * cltom(x) - convert cluster # to ptr to beginning of cluster
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79 */
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80 #define mtod(m, t) ((t)((m)->m_data))
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81 #define dtom(x) ((struct mbuf *)((CYG_ADDRESS)(x) & ~(MSIZE-1)))
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82 extern int cyg_mtocl(u_long);
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83 extern struct mbuf *cyg_cltom(u_long);
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84 #define mtocl(x) cyg_mtocl((u_long)x)
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85 #define cltom(x) cyg_cltom((u_long)x)
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86
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87 /* header at beginning of each mbuf: */
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88 struct m_hdr {
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89 struct mbuf *mh_next; /* next buffer in chain */
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90 struct mbuf *mh_nextpkt; /* next chain in queue/record */
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91 caddr_t mh_data; /* location of data */
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92 int mh_len; /* amount of data in this mbuf */
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93 short mh_type; /* type of data in this mbuf */
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94 short mh_flags; /* flags; see below */
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95 };
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96
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97 /* record/packet header in first mbuf of chain; valid if M_PKTHDR set */
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98 struct pkthdr {
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99 struct ifnet *rcvif; /* rcv interface */
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100 int len; /* total packet length */
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101 /* variables for ip and tcp reassembly */
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102 void *header; /* pointer to packet header */
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103 /* variables for hardware checksum */
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104 int csum_flags; /* flags regarding checksum */
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105 int csum_data; /* data field used by csum routines */
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106 struct mbuf *aux; /* extra data buffer; ipsec/others */
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107 };
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108
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109 /* description of external storage mapped into mbuf, valid if M_EXT set */
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110 struct m_ext {
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111 caddr_t ext_buf; /* start of buffer */
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112 void (*ext_free) /* free routine if not the usual */
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113 __P((caddr_t, u_int));
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114 u_int ext_size; /* size of buffer, for ext_free */
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115 void (*ext_ref) /* add a reference to the ext object */
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116 __P((caddr_t, u_int));
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117 };
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118
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119 struct mbuf {
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120 struct m_hdr m_hdr;
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121 union {
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122 struct {
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123 struct pkthdr MH_pkthdr; /* M_PKTHDR set */
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124 union {
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125 struct m_ext MH_ext; /* M_EXT set */
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126 char MH_databuf[MHLEN];
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127 } MH_dat;
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128 } MH;
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129 char M_databuf[MLEN]; /* !M_PKTHDR, !M_EXT */
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130 } M_dat;
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131 };
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132 #define m_next m_hdr.mh_next
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133 #define m_len m_hdr.mh_len
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134 #define m_data m_hdr.mh_data
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135 #define m_type m_hdr.mh_type
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136 #define m_flags m_hdr.mh_flags
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137 #define m_nextpkt m_hdr.mh_nextpkt
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138 #define m_act m_nextpkt
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139 #define m_pkthdr M_dat.MH.MH_pkthdr
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140 #define m_ext M_dat.MH.MH_dat.MH_ext
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141 #define m_pktdat M_dat.MH.MH_dat.MH_databuf
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142 #define m_dat M_dat.M_databuf
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143
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144 /* mbuf flags */
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145 #define M_EXT 0x0001 /* has associated external storage */
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146 #define M_PKTHDR 0x0002 /* start of record */
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147 #define M_EOR 0x0004 /* end of record */
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148 #define M_PROTO1 0x0008 /* protocol-specific */
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149 #define M_PROTO2 0x0010 /* protocol-specific */
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150 #define M_PROTO3 0x0020 /* protocol-specific */
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151 #define M_PROTO4 0x0040 /* protocol-specific */
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152 #define M_PROTO5 0x0080 /* protocol-specific */
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153 #define M_PROTO6 0x2000 /* protocol-specific */
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154
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155 /* mbuf pkthdr flags, also in m_flags */
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156 #define M_BCAST 0x0100 /* send/received as link-level broadcast */
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157 #define M_MCAST 0x0200 /* send/received as link-level multicast */
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158 #define M_FRAG 0x0400 /* packet is a fragment of a larger packet */
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159 #define M_FIRSTFRAG 0x0800 /* packet is first fragment */
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160 #define M_LASTFRAG 0x1000 /* packet is last fragment */
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161
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162 #define M_AUX 0x4000 /* mbufs pointed to by m->m_pkthdr.aux */
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163
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164 /* flags copied when copying m_pkthdr */
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165 #define M_COPYFLAGS (M_PKTHDR|M_EOR|M_PROTO1|M_PROTO1|M_PROTO2|M_PROTO3| \
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166 M_PROTO4|M_PROTO5|M_PROTO6|M_BCAST|M_MCAST|M_FRAG| \
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167 M_AUX)
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168
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169 /* flags indicating hw checksum support and sw checksum requirements */
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170 #define CSUM_IP 0x0001 /* will csum IP */
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171 #define CSUM_TCP 0x0002 /* will csum TCP */
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172 #define CSUM_UDP 0x0004 /* will csum UDP */
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173 #define CSUM_IP_FRAGS 0x0008 /* will csum IP fragments */
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174 #define CSUM_FRAGMENT 0x0010 /* will do IP fragmentation */
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175
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176 #define CSUM_IP_CHECKED 0x0100 /* did csum IP */
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177 #define CSUM_IP_VALID 0x0200 /* ... the csum is valid */
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178 #define CSUM_DATA_VALID 0x0400 /* csum_data field is valid */
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179 #define CSUM_PSEUDO_HDR 0x0800 /* csum_data has pseudo hdr */
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180
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181 #define CSUM_DELAY_DATA (CSUM_TCP | CSUM_UDP)
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182 #define CSUM_DELAY_IP (CSUM_IP) /* XXX add ipv6 here too? */
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183
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184 /* mbuf types */
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185 #define MT_FREE 0 /* should be on free list */
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186 #define MT_DATA 1 /* dynamic (data) allocation */
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187 #define MT_HEADER 2 /* packet header */
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188 #if 0
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189 #define MT_SOCKET 3 /* socket structure */
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190 #define MT_PCB 4 /* protocol control block */
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191 #define MT_RTABLE 5 /* routing tables */
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192 #define MT_HTABLE 6 /* IMP host tables */
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193 #define MT_ATABLE 7 /* address resolution tables */
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194 #endif
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195 #define MT_SONAME 8 /* socket name */
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196 #if 0
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197 #define MT_SOOPTS 10 /* socket options */
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198 #endif
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199 #define MT_FTABLE 11 /* fragment reassembly header */
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200 #if 0
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201 #define MT_RIGHTS 12 /* access rights */
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202 #define MT_IFADDR 13 /* interface address */
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203 #endif
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204 #define MT_CONTROL 14 /* extra-data protocol message */
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205 #define MT_OOBDATA 15 /* expedited data */
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206
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207 #define MT_NTYPES 16 /* number of mbuf types for mbtypes[] */
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208
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209 /*
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210 * mbuf statistics
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211 */
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212 struct mbstat {
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213 u_long m_mbufs; /* mbufs obtained from page pool */
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214 u_long m_clusters; /* clusters obtained from page pool */
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215 u_long m_spare; /* spare field */
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216 u_long m_clfree; /* free clusters */
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217 u_long m_drops; /* times failed to find space */
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218 u_long m_wait; /* times waited for space */
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219 u_long m_drain; /* times drained protocols for space */
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220 u_long m_mcfail; /* times m_copym failed */
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221 u_long m_mpfail; /* times m_pullup failed */
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222 u_long m_msize; /* length of an mbuf */
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223 u_long m_mclbytes; /* length of an mbuf cluster */
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224 u_long m_minclsize; /* min length of data to allocate a cluster */
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225 u_long m_mlen; /* length of data in an mbuf */
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226 u_long m_mhlen; /* length of data in a header mbuf */
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227
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228 u_quad_t m_exthdrget; /* # of calls to IP6_EXTHDR_GET */
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229 u_quad_t m_exthdrget0; /* # of calls to IP6_EXTHDR_GET0 */
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230 u_quad_t m_pulldowns; /* # of calls to m_pulldown */
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231 u_quad_t m_pulldown_copy; /* # of mbuf copies in m_pulldown */
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232 u_quad_t m_pulldown_alloc; /* # of mbuf allocs in m_pulldown */
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233 u_quad_t m_pullups; /* # of calls to m_pullup */
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234 u_quad_t m_pullup_copy; /* # of possible m_pullup copies */
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235 u_quad_t m_pullup_alloc; /* # of possible m_pullup mallocs */
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236 u_quad_t m_pullup_fail; /* # of possible m_pullup failures */
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237 u_quad_t m_pullup2; /* # of calls to m_pullup2 */
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238 u_quad_t m_pullup2_copy; /* # of possible m_pullup2 copies */
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239 u_quad_t m_pullup2_alloc; /* # of possible m_pullup2 mallocs */
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240 u_quad_t m_pullup2_fail; /* # of possible m_pullup2 failures */
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241 };
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242
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243 /* flags to m_get/MGET */
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244 #define M_DONTWAIT 1
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245 #define M_WAIT 0
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246
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247 /* Freelists:
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248 *
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249 * Normal mbuf clusters are normally treated as character arrays
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250 * after allocation, but use the first word of the buffer as a free list
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251 * pointer while on the free list.
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252 */
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253 union mcluster {
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254 union mcluster *mcl_next;
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255 char mcl_buf[MCLBYTES];
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256 };
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257
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258
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259 /*
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260 * These are identifying numbers passed to the m_mballoc_wait function,
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261 * allowing us to determine whether the call came from an MGETHDR or
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262 * an MGET.
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263 */
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264 #define MGETHDR_C 1
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265 #define MGET_C 2
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266
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267 /*
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268 * Wake up the next instance (if any) of m_mballoc_wait() which is
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269 * waiting for an mbuf to be freed. This should be called at splimp().
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270 *
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271 * XXX: If there is another free mbuf, this routine will be called [again]
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272 * from the m_mballoc_wait routine in order to wake another sleep instance.
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273 */
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274 #define MMBWAKEUP() do { \
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275 if (m_mballoc_wid) { \
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276 m_mballoc_wid--; \
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277 wakeup_one(&m_mballoc_wid); \
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278 } \
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279 } while (0)
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280
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281 /*
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282 * Same as above, but for mbuf cluster(s).
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283 */
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284 #define MCLWAKEUP() do { \
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285 if (m_clalloc_wid) { \
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286 m_clalloc_wid--; \
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287 wakeup_one(&m_clalloc_wid); \
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288 } \
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289 } while (0)
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290
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291 /*
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292 * mbuf utility macros:
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293 *
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294 * MBUFLOCK(code)
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295 * prevents a section of code from from being interrupted by network
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296 * drivers.
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297 */
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298 #define MBUFLOCK(code) do { \
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299 int _ms = splimp(); \
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300 \
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301 { code } \
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302 splx(_ms); \
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303 } while (0)
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304
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305 /*
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306 * mbuf allocation/deallocation macros:
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307 *
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308 * MGET(struct mbuf *m, int how, int type)
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309 * allocates an mbuf and initializes it to contain internal data.
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310 *
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311 * MGETHDR(struct mbuf *m, int how, int type)
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312 * allocates an mbuf and initializes it to contain a packet header
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313 * and internal data.
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314 */
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315 #define MGET(m, how, type) do { \
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316 struct mbuf *_mm; \
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317 int _mhow = (how); \
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318 int _mtype = (type); \
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319 int _ms = splimp(); \
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320 \
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321 if (mmbfree == NULL) \
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322 (void)m_mballoc(1, _mhow); \
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323 _mm = mmbfree; \
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324 if (_mm != NULL) { \
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325 mmbfree = _mm->m_next; \
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326 mbtypes[MT_FREE]--; \
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327 _mm->m_type = _mtype; \
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328 mbtypes[_mtype]++; \
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329 _mm->m_next = NULL; \
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330 _mm->m_nextpkt = NULL; \
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331 _mm->m_data = _mm->m_dat; \
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332 _mm->m_flags = 0; \
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333 (m) = _mm; \
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334 splx(_ms); \
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335 } else { \
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336 splx(_ms); \
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337 _mm = m_retry(_mhow, _mtype); \
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338 if (_mm == NULL && _mhow == M_WAIT) \
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339 (m) = m_mballoc_wait(MGET_C, _mtype); \
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340 else \
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341 (m) = _mm; \
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342 } \
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343 } while (0)
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344
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345 #define MGETHDR(m, how, type) do { \
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346 struct mbuf *_mm; \
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347 int _mhow = (how); \
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348 int _mtype = (type); \
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349 int _ms = splimp(); \
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350 \
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351 if (mmbfree == NULL) \
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352 (void)m_mballoc(1, _mhow); \
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353 _mm = mmbfree; \
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354 if (_mm != NULL) { \
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355 mmbfree = _mm->m_next; \
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356 mbtypes[MT_FREE]--; \
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357 _mm->m_type = _mtype; \
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358 mbtypes[_mtype]++; \
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359 _mm->m_next = NULL; \
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360 _mm->m_nextpkt = NULL; \
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361 _mm->m_data = _mm->m_pktdat; \
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362 _mm->m_flags = M_PKTHDR; \
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363 bzero(&(_mm)->m_pkthdr, sizeof((_mm)->m_pkthdr)); \
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364 (m) = _mm; \
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365 splx(_ms); \
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366 } else { \
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367 splx(_ms); \
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368 _mm = m_retryhdr(_mhow, _mtype); \
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369 if (_mm == NULL && _mhow == M_WAIT) \
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370 (m) = m_mballoc_wait(MGETHDR_C, _mtype); \
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371 else \
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372 (m) = _mm; \
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373 } \
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374 } while (0)
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375
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376 /*
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377 * Mbuf cluster macros.
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378 * MCLALLOC(caddr_t p, int how) allocates an mbuf cluster.
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379 * MCLGET adds such clusters to a normal mbuf;
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380 * the flag M_EXT is set upon success.
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381 * MCLFREE releases a reference to a cluster allocated by MCLALLOC,
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382 * freeing the cluster if the reference count has reached 0.
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383 */
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384 #define MCLALLOC(p, how) do { \
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385 caddr_t _mp; \
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386 int _mhow = (how); \
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387 int _ms = splimp(); \
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388 \
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389 if (mclfree == NULL) \
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390 (void)m_clalloc(1, _mhow); \
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391 _mp = (caddr_t)mclfree; \
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392 if (_mp != NULL) { \
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393 mclrefcnt[mtocl(_mp)]++; \
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394 mbstat.m_clfree--; \
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395 mclfree = ((union mcluster *)_mp)->mcl_next; \
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396 (p) = _mp; \
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397 splx(_ms); \
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398 } else { \
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399 splx(_ms); \
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400 if (_mhow == M_WAIT) \
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401 (p) = m_clalloc_wait(); \
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402 else \
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403 (p) = NULL; \
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404 } \
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405 } while (0)
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406
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407 #define MCLGET(m, how) do { \
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408 struct mbuf *_mm = (m); \
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409 \
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410 MCLALLOC(_mm->m_ext.ext_buf, (how)); \
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411 if (_mm->m_ext.ext_buf != NULL) { \
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412 _mm->m_data = _mm->m_ext.ext_buf; \
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413 _mm->m_flags |= M_EXT; \
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414 _mm->m_ext.ext_free = NULL; \
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415 _mm->m_ext.ext_ref = NULL; \
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416 _mm->m_ext.ext_size = MCLBYTES; \
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417 } \
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418 } while (0)
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419
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420 #define MCLFREE1(p) do { \
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421 union mcluster *_mp = (union mcluster *)(p); \
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422 \
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423 /* KASSERT(mclrefcnt[mtocl(_mp)] > 0, ("freeing free cluster")); */ \
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424 if (--mclrefcnt[mtocl(_mp)] == 0) { \
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425 _mp->mcl_next = mclfree; \
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426 mclfree = _mp; \
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427 mbstat.m_clfree++; \
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428 MCLWAKEUP(); \
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429 } \
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430 } while (0)
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431
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432 #define MCLFREE(p) MBUFLOCK( \
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433 MCLFREE1(p); \
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434 )
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435
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436 #define MEXTFREE1(m) do { \
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437 struct mbuf *_mm = (m); \
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438 \
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439 if (_mm->m_ext.ext_free != NULL) \
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440 (*_mm->m_ext.ext_free)(_mm->m_ext.ext_buf, \
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441 _mm->m_ext.ext_size); \
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442 else \
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443 MCLFREE1(_mm->m_ext.ext_buf); \
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444 } while (0)
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445
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446 #define MEXTFREE(m) MBUFLOCK( \
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447 MEXTFREE1(m); \
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448 )
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449
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450 /*
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451 * MFREE(struct mbuf *m, struct mbuf *n)
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452 * Free a single mbuf and associated external storage.
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453 * Place the successor, if any, in n.
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454 *
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455 * we do need to check non-first mbuf for m_aux, since some of existing
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456 * code does not call M_PREPEND properly.
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457 * (example: call to bpf_mtap from drivers)
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458 */
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459 #define MFREE(m, n) MBUFLOCK( \
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460 struct mbuf *_mm = (m); \
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461 \
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462 /* KASSERT(_mm->m_type != MT_FREE, ("freeing free mbuf")); */ \
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463 mbtypes[_mm->m_type]--; \
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464 if ((_mm->m_flags & M_PKTHDR) != 0 && _mm->m_pkthdr.aux) { \
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465 m_freem(_mm->m_pkthdr.aux); \
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466 _mm->m_pkthdr.aux = NULL; \
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467 } \
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468 if (_mm->m_flags & M_EXT) \
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469 MEXTFREE1(m); \
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470 (n) = _mm->m_next; \
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471 _mm->m_type = MT_FREE; \
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472 mbtypes[MT_FREE]++; \
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473 _mm->m_next = mmbfree; \
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474 mmbfree = _mm; \
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475 MMBWAKEUP(); \
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476 )
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477
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478 /*
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479 * Copy mbuf pkthdr from "from" to "to".
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480 * from must have M_PKTHDR set, and to must be empty.
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481 * aux pointer will be moved to `to'.
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482 */
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483 #define M_COPY_PKTHDR(to, from) do { \
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484 struct mbuf *_mfrom = (from); \
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485 struct mbuf *_mto = (to); \
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486 \
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487 _mto->m_data = _mto->m_pktdat; \
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488 _mto->m_flags = _mfrom->m_flags & M_COPYFLAGS; \
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489 _mto->m_pkthdr = _mfrom->m_pkthdr; \
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490 _mfrom->m_pkthdr.aux = (struct mbuf *)NULL; \
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491 } while (0)
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492
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493 /*
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494 * Set the m_data pointer of a newly-allocated mbuf (m_get/MGET) to place
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495 * an object of the specified size at the end of the mbuf, longword aligned.
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496 */
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497 #define M_ALIGN(m, len) do { \
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498 (m)->m_data += (MLEN - (len)) & ~(sizeof(long) - 1); \
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499 } while (0)
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500
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501 /*
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502 * As above, for mbufs allocated with m_gethdr/MGETHDR
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503 * or initialized by M_COPY_PKTHDR.
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504 */
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505 #define MH_ALIGN(m, len) do { \
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506 (m)->m_data += (MHLEN - (len)) & ~(sizeof(long) - 1); \
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507 } while (0)
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508
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509 /*
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510 * Check if we can write to an mbuf.
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511 */
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512 #define M_WRITABLE(m) (!((m)->m_flags & M_EXT) || \
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513 ((m)->m_ext.ext_free == NULL && mclrefcnt[mtocl((m)->m_ext.ext_buf)] == 1))
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514
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515 /*
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diff changeset
516 * Compute the amount of space available
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517 * before the current start of data in an mbuf.
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518 */
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519 #define M_LEADINGSPACE(m) \
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520 ((m)->m_flags & M_EXT ? \
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521 /* (m)->m_data - (m)->m_ext.ext_buf */ 0 : \
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522 (m)->m_flags & M_PKTHDR ? (m)->m_data - (m)->m_pktdat : \
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523 (m)->m_data - (m)->m_dat)
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diff changeset
524
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525 /*
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diff changeset
526 * Compute the amount of space available
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diff changeset
527 * after the end of data in an mbuf.
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528 */
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529 #define M_TRAILINGSPACE(m) \
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530 ((m)->m_flags & M_EXT ? (m)->m_ext.ext_buf + \
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531 (m)->m_ext.ext_size - ((m)->m_data + (m)->m_len) : \
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532 &(m)->m_dat[MLEN] - ((m)->m_data + (m)->m_len))
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533
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534 /*
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535 * Arrange to prepend space of size plen to mbuf m.
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536 * If a new mbuf must be allocated, how specifies whether to wait.
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diff changeset
537 * If how is M_DONTWAIT and allocation fails, the original mbuf chain
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538 * is freed and m is set to NULL.
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539 */
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diff changeset
540 #define M_PREPEND(m, plen, how) do { \
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541 struct mbuf **_mmp = &(m); \
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542 struct mbuf *_mm = *_mmp; \
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diff changeset
543 int _mplen = (plen); \
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544 int __mhow = (how); \
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545 \
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546 if (M_LEADINGSPACE(_mm) >= _mplen) { \
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547 _mm->m_data -= _mplen; \
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548 _mm->m_len += _mplen; \
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549 } else \
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550 _mm = m_prepend(_mm, _mplen, __mhow); \
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551 if (_mm != NULL && _mm->m_flags & M_PKTHDR) \
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552 _mm->m_pkthdr.len += _mplen; \
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553 *_mmp = _mm; \
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554 } while (0)
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555
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556 /* change mbuf to new type */
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557 #define MCHTYPE(m, t) do { \
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558 struct mbuf *_mm = (m); \
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559 int _mt = (t); \
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560 int _ms = splimp(); \
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561 \
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562 mbtypes[_mm->m_type]--; \
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563 mbtypes[_mt]++; \
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564 splx(_ms); \
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565 _mm->m_type = (_mt); \
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566 } while (0)
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567
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568 /* length to m_copy to copy all */
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569 #define M_COPYALL 1000000000
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570
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571 /* compatibility with 4.3 */
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572 #define m_copy(m, o, l) m_copym((m), (o), (l), M_DONTWAIT)
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573
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574 /*
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575 * pkthdr.aux type tags.
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576 */
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577 struct mauxtag {
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578 int af;
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579 int type;
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580 void* p;
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581 };
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582
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583 #ifdef _KERNEL
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584 extern u_int m_clalloc_wid; /* mbuf cluster wait count */
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585 extern u_int m_mballoc_wid; /* mbuf wait count */
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586 extern int max_linkhdr; /* largest link-level header */
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587 extern int max_protohdr; /* largest protocol header */
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588 extern int max_hdr; /* largest link+protocol header */
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589 extern int max_datalen; /* MHLEN - max_hdr */
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590 extern struct mbstat mbstat;
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591 extern u_long mbtypes[MT_NTYPES]; /* per-type mbuf allocations */
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592 extern int mbuf_wait; /* mbuf sleep time */
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593 extern struct mbuf *mbutl; /* virtual address of mclusters */
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594 extern char *mclrefcnt; /* cluster reference counts */
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595 extern union mcluster *mclfree;
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596 extern struct mbuf *mmbfree;
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597 extern int nmbclusters;
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598 extern int nmbufs;
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599 extern int nsfbufs;
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600
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601 void m_adj __P((struct mbuf *, int));
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602 void m_cat __P((struct mbuf *,struct mbuf *));
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603 int m_clalloc __P((int, int));
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604 caddr_t m_clalloc_wait __P((void));
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605 void m_copyback __P((struct mbuf *, int, int, caddr_t));
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606 void m_copydata __P((struct mbuf *,int,int,caddr_t));
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607 struct mbuf *m_copym __P((struct mbuf *, int, int, int));
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608 struct mbuf *m_copypacket __P((struct mbuf *, int));
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609 struct mbuf *m_devget __P((char *, int, int, struct ifnet *,
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610 void (*copy)(char *, caddr_t, u_int)));
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611 struct mbuf *m_dup __P((struct mbuf *, int));
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612 struct mbuf *m_free __P((struct mbuf *));
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613 void m_freem __P((struct mbuf *));
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614 struct mbuf *m_get __P((int, int));
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615 struct mbuf *m_getclr __P((int, int));
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616 struct mbuf *m_gethdr __P((int, int));
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617 struct mbuf *m_getm __P((struct mbuf *, int, int, int));
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618 int m_mballoc __P((int, int));
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619 struct mbuf *m_mballoc_wait __P((int, int));
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620 struct mbuf *m_prepend __P((struct mbuf *,int,int));
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621 struct mbuf *m_pulldown __P((struct mbuf *, int, int, int *));
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622 void m_print __P((const struct mbuf *m));
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623 struct mbuf *m_pullup __P((struct mbuf *, int));
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624 struct mbuf *m_retry __P((int, int));
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625 struct mbuf *m_retryhdr __P((int, int));
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626 struct mbuf *m_split __P((struct mbuf *,int,int));
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627 struct mbuf *m_aux_add2 __P((struct mbuf *, int, int, void *));
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628 struct mbuf *m_aux_find2 __P((struct mbuf *, int, int, void *));
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629 struct mbuf *m_aux_add __P((struct mbuf *, int, int));
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630 struct mbuf *m_aux_find __P((struct mbuf *, int, int));
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631 void m_aux_delete __P((struct mbuf *, struct mbuf *));
1565
5c539c544148 * src/sys/kern/uipc_mbuf.c
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parents: 829
diff changeset
632 extern void *cyg_net_mbuf_alloc(void);
208
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633 extern void *cyg_net_cluster_alloc(void );
829
639f0c464be5 * src/ecos/support.c: Added function cyg_net_show_mbufs() and code
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parents: 208
diff changeset
634 #ifdef CYGDBG_NET_SHOW_MBUFS
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635 extern void cyg_net_show_mbufs(void);
639f0c464be5 * src/ecos/support.c: Added function cyg_net_show_mbufs() and code
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diff changeset
636 #endif
208
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637 #endif /* _KERNEL */
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638
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639 #endif /* !_SYS_MBUF_H_ */