vnode_if.sh revision 1.11
1 #!/bin/sh - 2 copyright="\ 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 " 36 SCRIPT_ID='$NetBSD: vnode_if.sh,v 1.11 1997/07/07 20:17:36 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 44 if [ $# -ne 1 ] ; then 45 echo 'usage: vnode_if.sh srcfile' 46 exit 1 47 fi 48 49 # Name and revision of the source file. 50 src=$1 51 SRC_ID=`head -1 $src | sed -e 's/.*\$\(.*\)\$.*/\1/'` 52 53 # Names of the created files. 54 out_c=vnode_if.c 55 out_h=../sys/vnode_if.h 56 57 # Awk program (must support nawk extensions) 58 # Use "awk" at Berkeley, "nawk" or "gawk" elsewhere. 59 awk=${AWK:-awk} 60 61 # Does this awk have a "toupper" function? (i.e. is it GNU awk) 62 isgawk=`$awk 'BEGIN { print toupper("true"); exit; }' 2>/dev/null` 63 64 # If this awk does not define "toupper" then define our own. 65 if [ "$isgawk" = TRUE ] ; then 66 # GNU awk provides it. 67 toupper= 68 else 69 # Provide our own toupper() 70 toupper=' 71 function toupper(str) { 72 _toupper_cmd = "echo "str" |tr a-z A-Z" 73 _toupper_cmd | getline _toupper_str; 74 close(_toupper_cmd); 75 return _toupper_str; 76 }' 77 fi 78 79 # 80 # This is the common part of all awk programs that read $src 81 # This parses the input for one function into the arrays: 82 # argdir, argtype, argname, willrele 83 # and calls "doit()" to generate output for the function. 84 # 85 # Input to this parser is pre-processed slightly by sed 86 # so this awk parser doesn't have to work so hard. The 87 # changes done by the sed pre-processing step are: 88 # insert a space beween * and pointer name 89 # replace semicolons with spaces 90 # 91 sed_prep='s:\*\([^\*/]\):\* \1:g 92 s/;/ /' 93 awk_parser=' 94 # Comment line 95 /^#/ { next; } 96 # First line of description 97 /^vop_/ { 98 name=$1; 99 argc=0; 100 next; 101 } 102 # Last line of description 103 /^}/ { 104 doit(); 105 next; 106 } 107 # Middle lines of description 108 { 109 argdir[argc] = $1; i=2; 110 if ($2 == "WILLRELE") { 111 willrele[argc] = 1; 112 i++; 113 } else 114 willrele[argc] = 0; 115 argtype[argc] = $i; i++; 116 while (i < NF) { 117 argtype[argc] = argtype[argc]" "$i; 118 i++; 119 } 120 argname[argc] = $i; 121 argc++; 122 next; 123 } 124 ' 125 126 # This is put after the copyright on each generated file. 127 warning="\ 128 /* 129 * Warning: This file is generated automatically. 130 * (Modifications made here may easily be lost!) 131 * 132 * Created from the file: 133 * ${SRC_ID} 134 * by the script: 135 * ${SCRIPT_ID} 136 */ 137 " 138 139 # This is to satisfy McKusick (get rid of evil spaces 8^) 140 anal_retentive='s:\([^/]\*\) :\1:g' 141 142 # 143 # Redirect stdout to the H file. 144 # 145 echo "$0: Creating $out_h" 1>&2 146 exec > $out_h 147 148 # Begin stuff 149 echo -n "$warning" | sed -e 's/\$//g' 150 echo "" 151 echo -n "$copyright" 152 echo '' 153 echo '#ifndef _SYS_VNODE_IF_H_' 154 echo '#define _SYS_VNODE_IF_H_' 155 echo ' 156 extern struct vnodeop_desc vop_default_desc; 157 ' 158 159 # Body stuff 160 # This awk program needs toupper() so define it if necessary. 161 sed -e "$sed_prep" $src | $awk "$toupper"' 162 function doit() { 163 # Declare arg struct, descriptor. 164 printf("\nstruct %s_args {\n", name); 165 printf("\tstruct vnodeop_desc * a_desc;\n"); 166 for (i=0; i<argc; i++) { 167 printf("\t%s a_%s;\n", argtype[i], argname[i]); 168 } 169 printf("};\n"); 170 printf("extern struct vnodeop_desc %s_desc;\n", name); 171 # Prototype it. 172 protoarg = sprintf("static __inline int %s __P((", toupper(name)); 173 protolen = length(protoarg); 174 printf("%s", protoarg); 175 for (i=0; i<argc; i++) { 176 protoarg = sprintf("%s", argtype[i]); 177 if (i < (argc-1)) protoarg = (protoarg ", "); 178 arglen = length(protoarg); 179 if (i == (argc-1)) 180 arglen += length(" __attribute__ ((unused))"); 181 if ((protolen + arglen) > 77) { 182 protoarg = ("\n " protoarg); 183 arglen += 4; 184 protolen = 0; 185 } 186 printf("%s", protoarg); 187 protolen += arglen; 188 } 189 printf(")) __attribute__ ((unused));\n"); 190 # Define inline function. 191 printf("static __inline int %s(", toupper(name)); 192 for (i=0; i<argc; i++) { 193 printf("%s", argname[i]); 194 if (i < (argc-1)) printf(", "); 195 } 196 printf(")\n"); 197 for (i=0; i<argc; i++) { 198 printf("\t%s %s;\n", argtype[i], argname[i]); 199 } 200 printf("{\n\tstruct %s_args a;\n", name); 201 printf("\ta.a_desc = VDESC(%s);\n", name); 202 for (i=0; i<argc; i++) { 203 printf("\ta.a_%s = %s;\n", argname[i], argname[i]); 204 } 205 printf("\treturn (VCALL(%s%s, VOFFSET(%s), &a));\n}\n", 206 argname[0], arg0special, name); 207 } 208 BEGIN { 209 arg0special=""; 210 } 211 END { 212 printf("\n/* Special cases: */\n#include <sys/buf.h>\n"); 213 argc=1; 214 argtype[0]="struct buf *"; 215 argname[0]="bp"; 216 arg0special="->b_vp"; 217 name="vop_strategy"; 218 doit(); 219 name="vop_bwrite"; 220 doit(); 221 } 222 '"$awk_parser" | sed -e "$anal_retentive" 223 224 # End stuff 225 echo ' 226 /* End of special cases. */' 227 echo '' 228 echo '#endif /* !_SYS_VNODE_IF_H_ */' 229 230 # 231 # Redirect stdout to the C file. 232 # 233 echo "$0: Creating $out_c" 1>&2 234 exec > $out_c 235 236 # Begin stuff 237 echo -n "$warning" | sed -e 's/\$//g' 238 echo "" 239 echo -n "$copyright" 240 echo ' 241 #include <sys/param.h> 242 #include <sys/mount.h> 243 #include <sys/vnode.h> 244 245 struct vnodeop_desc vop_default_desc = { 246 0, 247 "default", 248 0, 249 NULL, 250 VDESC_NO_OFFSET, 251 VDESC_NO_OFFSET, 252 VDESC_NO_OFFSET, 253 VDESC_NO_OFFSET, 254 NULL, 255 }; 256 ' 257 258 # Body stuff 259 sed -e "$sed_prep" $src | $awk ' 260 function do_offset(typematch) { 261 for (i=0; i<argc; i++) { 262 if (argtype[i] == typematch) { 263 printf("\tVOPARG_OFFSETOF(struct %s_args, a_%s),\n", 264 name, argname[i]); 265 return i; 266 }; 267 }; 268 print "\tVDESC_NO_OFFSET,"; 269 return -1; 270 } 271 272 function doit() { 273 # Define offsets array 274 printf("\nint %s_vp_offsets[] = {\n", name); 275 for (i=0; i<argc; i++) { 276 if (argtype[i] == "struct vnode *") { 277 printf ("\tVOPARG_OFFSETOF(struct %s_args,a_%s),\n", 278 name, argname[i]); 279 } 280 } 281 print "\tVDESC_NO_OFFSET"; 282 print "};"; 283 # Define F_desc 284 printf("struct vnodeop_desc %s_desc = {\n", name); 285 # offset 286 printf ("\t0,\n"); 287 # printable name 288 printf ("\t\"%s\",\n", name); 289 # flags 290 printf("\t0"); 291 vpnum = 0; 292 for (i=0; i<argc; i++) { 293 if (willrele[i]) { 294 if (argdir[i] ~ /OUT/) { 295 printf(" | VDESC_VPP_WILLRELE"); 296 } else { 297 printf(" | VDESC_VP%s_WILLRELE", vpnum); 298 }; 299 vpnum++; 300 } 301 } 302 print ","; 303 # vp offsets 304 printf ("\t%s_vp_offsets,\n", name); 305 # vpp (if any) 306 do_offset("struct vnode **"); 307 # cred (if any) 308 do_offset("struct ucred *"); 309 # proc (if any) 310 do_offset("struct proc *"); 311 # componentname 312 do_offset("struct componentname *"); 313 # transport layer information 314 printf ("\tNULL,\n};\n"); 315 } 316 END { 317 printf("\n/* Special cases: */\n"); 318 argc=1; 319 argdir[0]="IN"; 320 argtype[0]="struct buf *"; 321 argname[0]="bp"; 322 willrele[0]=0; 323 name="vop_strategy"; 324 doit(); 325 name="vop_bwrite"; 326 doit(); 327 } 328 '"$awk_parser" | sed -e "$anal_retentive" 329 330 # End stuff 331 echo ' 332 /* End of special cases. */' 333 334 # Add the vfs_op_descs array to the C file. 335 # Begin stuff 336 echo ' 337 struct vnodeop_desc *vfs_op_descs[] = { 338 &vop_default_desc, /* MUST BE FIRST */ 339 &vop_strategy_desc, /* XXX: SPECIAL CASE */ 340 &vop_bwrite_desc, /* XXX: SPECIAL CASE */ 341 ' 342 343 # Body stuff 344 sed -e "$sed_prep" $src | $awk ' 345 function doit() { 346 printf("\t&%s_desc,\n", name); 347 } 348 '"$awk_parser" 349 350 # End stuff 351 echo ' NULL 352 }; 353 ' 354 355 exit 0 356 357 # Local Variables: 358 # tab-width: 4 359 # End: 360
Indexes created Thu Oct 02 14:10:14 GMT 2025