1#!/bin/sh - 2copyright=' 3/* 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. 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 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35' 36SCRIPT_ID='$NetBSD: vnode_if.sh,v 1.7 1994/08/25 03:04:28 cgd Exp $' 37 38# Script to produce VFS front-end sugar. 39# 40# usage: vnode_if.sh srcfile 41# (where srcfile is currently /sys/kern/vnode_if.src) 42# 43 44if [ $# -ne 1 ] ; then 45 echo 'usage: vnode_if.sh srcfile' 46 exit 1 47fi 48 49# Name of the source file. 50src=$1 51 52# Names of the created files. 53out_c=vnode_if.c 54out_h=vnode_if.h 55 56# Awk program (must support nawk extensions) 57# Use "awk" at Berkeley, "nawk" or "gawk" elsewhere. 58awk=${AWK:-awk} 59 60# Does this awk have a "toupper" function? (i.e. is it GNU awk) 61isgawk=`$awk 'BEGIN { print toupper("true"); exit; }' 2>/dev/null` 62 63# If this awk does not define "toupper" then define our own. 64if [ "$isgawk" = TRUE ] ; then 65 # GNU awk provides it. 66 toupper= 67else 68 # Provide our own toupper() 69 toupper=' 70function toupper(str) { 71 _toupper_cmd = "echo "str" |tr a-z A-Z" 72 _toupper_cmd | getline _toupper_str; 73 close(_toupper_cmd); 74 return _toupper_str; 75}' 76fi 77 78# 79# This is the common part of all awk programs that read $src 80# This parses the input for one function into the arrays: 81# argdir, argtype, argname, willrele 82# and calls "doit()" to generate output for the function. 83# 84# Input to this parser is pre-processed slightly by sed 85# so this awk parser doesn't have to work so hard. The 86# changes done by the sed pre-processing step are: 87# insert a space beween * and pointer name 88# replace semicolons with spaces 89# 90sed_prep='s:\*\([^\*/]\):\* \1:g 91s/;/ /' 92awk_parser=' 93# Comment line 94/^#/ { next; } 95# First line of description 96/^vop_/ { 97 name=$1; 98 argc=0; 99 next; 100} 101# Last line of description 102/^}/ { 103 doit(); 104 next; 105} 106# Middle lines of description 107{ 108 argdir[argc] = $1; i=2; 109 if ($2 == "WILLRELE") { 110 willrele[argc] = 1; 111 i++; 112 } else 113 willrele[argc] = 0; 114 argtype[argc] = $i; i++; 115 while (i < NF) { 116 argtype[argc] = argtype[argc]" "$i; 117 i++; 118 } 119 argname[argc] = $i; 120 argc++; 121 next; 122} 123' 124 125# This is put after the copyright on each generated file. 126warning=" 127/* 128 * Warning: This file is generated automatically. 129 * (Modifications made here may easily be lost!) 130 * 131 * Created by the script: 132 * ${SCRIPT_ID} 133 */ 134" 135 136# This is to satisfy McKusick (get rid of evil spaces 8^) 137anal_retentive='s:\([^/]\*\) :\1:g' 138 139# 140# Redirect stdout to the H file. 141# 142echo "$0: Creating $out_h" 1>&2 143exec > $out_h 144 145# Begin stuff 146echo "$copyright" 147echo "$warning" 148echo ' 149extern struct vnodeop_desc vop_default_desc; 150' 151 152# Body stuff 153# This awk program needs toupper() so define it if necessary. 154sed -e "$sed_prep" $src | $awk "$toupper"' 155function doit() { 156 # Declare arg struct, descriptor. 157 printf("\nstruct %s_args {\n", name); 158 printf("\tstruct vnodeop_desc * a_desc;\n"); 159 for (i=0; i<argc; i++) { 160 printf("\t%s a_%s;\n", argtype[i], argname[i]); 161 } 162 printf("};\n"); 163 printf("extern struct vnodeop_desc %s_desc;\n", name); 164 # Define inline function. 165 printf("static __inline int %s(", toupper(name)); 166 for (i=0; i<argc; i++) { 167 printf("%s", argname[i]); 168 if (i < (argc-1)) printf(", "); 169 } 170 printf(")\n"); 171 for (i=0; i<argc; i++) { 172 printf("\t%s %s;\n", argtype[i], argname[i]); 173 } 174 printf("{\n\tstruct %s_args a;\n", name); 175 printf("\ta.a_desc = VDESC(%s);\n", name); 176 for (i=0; i<argc; i++) { 177 printf("\ta.a_%s = %s;\n", argname[i], argname[i]); 178 } 179 printf("\treturn (VCALL(%s%s, VOFFSET(%s), &a));\n}\n", 180 argname[0], arg0special, name); 181} 182BEGIN { 183 arg0special=""; 184} 185END { 186 printf("\n/* Special cases: */\n#include <sys/buf.h>\n"); 187 argc=1; 188 argtype[0]="struct buf *"; 189 argname[0]="bp"; 190 arg0special="->b_vp"; 191 name="vop_strategy"; 192 doit(); 193 name="vop_bwrite"; 194 doit(); 195} 196'"$awk_parser" | sed -e "$anal_retentive" 197 198# End stuff 199echo ' 200/* End of special cases. */' 201 202 203# 204# Redirect stdout to the C file. 205# 206echo "$0: Creating $out_c" 1>&2 207exec > $out_c 208 209# Begin stuff 210echo "$copyright" 211echo "$warning" 212echo ' 213#include <sys/param.h> 214#include <sys/mount.h> 215#include <sys/vnode.h> 216 217struct vnodeop_desc vop_default_desc = { 218 0, 219 "default", 220 0, 221 NULL, 222 VDESC_NO_OFFSET, 223 VDESC_NO_OFFSET, 224 VDESC_NO_OFFSET, 225 VDESC_NO_OFFSET, 226 NULL, 227}; 228' 229 230# Body stuff 231sed -e "$sed_prep" $src | $awk ' 232function do_offset(typematch) { 233 for (i=0; i<argc; i++) { 234 if (argtype[i] == typematch) { 235 printf("\tVOPARG_OFFSETOF(struct %s_args, a_%s),\n", 236 name, argname[i]); 237 return i; 238 }; 239 }; 240 print "\tVDESC_NO_OFFSET,"; 241 return -1; 242} 243 244function doit() { 245 # Define offsets array 246 printf("\nint %s_vp_offsets[] = {\n", name); 247 for (i=0; i<argc; i++) { 248 if (argtype[i] == "struct vnode *") { 249 printf ("\tVOPARG_OFFSETOF(struct %s_args,a_%s),\n", 250 name, argname[i]); 251 } 252 } 253 print "\tVDESC_NO_OFFSET"; 254 print "};"; 255 # Define F_desc 256 printf("struct vnodeop_desc %s_desc = {\n", name); 257 # offset 258 printf ("\t0,\n"); 259 # printable name 260 printf ("\t\"%s\",\n", name); 261 # flags 262 printf("\t0"); 263 vpnum = 0; 264 for (i=0; i<argc; i++) { 265 if (willrele[i]) { 266 if (argdir[i] ~ /OUT/) { 267 printf(" | VDESC_VPP_WILLRELE"); 268 } else { 269 printf(" | VDESC_VP%s_WILLRELE", vpnum); 270 }; 271 vpnum++; 272 } 273 } 274 print ","; 275 # vp offsets 276 printf ("\t%s_vp_offsets,\n", name); 277 # vpp (if any) 278 do_offset("struct vnode **"); 279 # cred (if any) 280 do_offset("struct ucred *"); 281 # proc (if any) 282 do_offset("struct proc *"); 283 # componentname 284 do_offset("struct componentname *"); 285 # transport layer information 286 printf ("\tNULL,\n};\n"); 287} 288END { 289 printf("\n/* Special cases: */\n"); 290 argc=1; 291 argdir[0]="IN"; 292 argtype[0]="struct buf *"; 293 argname[0]="bp"; 294 willrele[0]=0; 295 name="vop_strategy"; 296 doit(); 297 name="vop_bwrite"; 298 doit(); 299} 300'"$awk_parser" | sed -e "$anal_retentive" 301 302# End stuff 303echo ' 304/* End of special cases. */' 305 306# Add the vfs_op_descs array to the C file. 307# Begin stuff 308echo ' 309struct vnodeop_desc *vfs_op_descs[] = { 310 &vop_default_desc, /* MUST BE FIRST */ 311 &vop_strategy_desc, /* XXX: SPECIAL CASE */ 312 &vop_bwrite_desc, /* XXX: SPECIAL CASE */ 313' 314 315# Body stuff 316sed -e "$sed_prep" $src | $awk ' 317function doit() { 318 printf("\t&%s_desc,\n", name); 319} 320'"$awk_parser" 321 322# End stuff 323echo ' NULL 324}; 325' 326 327exit 0 328 329# Local Variables: 330# tab-width: 4 331# End: 332