vnode_if.sh revision 1.19
1 #!/bin/sh - 2 copyright="\ 3 /* 4 * Copyright (c) 1992, 1993, 1994, 1995 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 1.19 1999/07/07 23:32:50 wrstuden 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 if ($2 == "WILLUNLOCK") { 114 willrele[argc] = 2; 115 i++; 116 } else if ($2 == "WILLPUT") { 117 willrele[argc] = 3; 118 i++; 119 } else 120 willrele[argc] = 0; 121 argtype[argc] = $i; i++; 122 while (i < NF) { 123 argtype[argc] = argtype[argc]" "$i; 124 i++; 125 } 126 argname[argc] = $i; 127 argc++; 128 next; 129 } 130 ' 131 132 # This is put before the copyright on each generated file. 133 warning="\ 134 /* @NetBSD@ */ 135 136 /* 137 * Warning: This file is generated automatically. 138 * (Modifications made here may easily be lost!) 139 * 140 * Created from the file: 141 * ${SRC_ID} 142 * by the script: 143 * ${SCRIPT_ID} 144 */ 145 " 146 147 # This is to satisfy McKusick (get rid of evil spaces 8^) 148 anal_retentive='s:\([^/]\*\) :\1:g' 149 150 # 151 # Redirect stdout to the H file. 152 # 153 echo "$0: Creating $out_h" 1>&2 154 exec > $out_h 155 156 # Begin stuff 157 echo -n "$warning" | sed -e 's/\$//g;s/@/\$/g' 158 echo "" 159 echo -n "$copyright" 160 echo '' 161 echo '#ifndef _SYS_VNODE_IF_H_' 162 echo '#define _SYS_VNODE_IF_H_' 163 echo ' 164 extern struct vnodeop_desc vop_default_desc; 165 ' 166 167 # Body stuff 168 # This awk program needs toupper() so define it if necessary. 169 sed -e "$sed_prep" $src | $awk "$toupper"' 170 function doit() { 171 # Declare arg struct, descriptor. 172 printf("\nstruct %s_args {\n", name); 173 printf("\tstruct vnodeop_desc * a_desc;\n"); 174 for (i=0; i<argc; i++) { 175 printf("\t%s a_%s;\n", argtype[i], argname[i]); 176 } 177 printf("};\n"); 178 printf("extern struct vnodeop_desc %s_desc;\n", name); 179 # Prototype it. 180 protoarg = sprintf("static __inline int %s __P((", toupper(name)); 181 protolen = length(protoarg); 182 printf("%s", protoarg); 183 for (i=0; i<argc; i++) { 184 protoarg = sprintf("%s", argtype[i]); 185 if (i < (argc-1)) protoarg = (protoarg ", "); 186 arglen = length(protoarg); 187 if (i == (argc-1)) 188 arglen += length(" __attribute__((__unused__))"); 189 if ((protolen + arglen) > 77) { 190 protoarg = ("\n " protoarg); 191 arglen += 4; 192 protolen = 0; 193 } 194 printf("%s", protoarg); 195 protolen += arglen; 196 } 197 printf(")) __attribute__((__unused__));\n"); 198 # Define inline function. 199 printf("static __inline int %s(", toupper(name)); 200 for (i=0; i<argc; i++) { 201 printf("%s", argname[i]); 202 if (i < (argc-1)) printf(", "); 203 } 204 printf(")\n"); 205 for (i=0; i<argc; i++) { 206 printf("\t%s %s;\n", argtype[i], argname[i]); 207 } 208 printf("{\n\tstruct %s_args a;\n", name); 209 printf("\ta.a_desc = VDESC(%s);\n", name); 210 for (i=0; i<argc; i++) { 211 printf("\ta.a_%s = %s;\n", argname[i], argname[i]); 212 } 213 printf("\treturn (VCALL(%s%s, VOFFSET(%s), &a));\n}\n", 214 argname[0], arg0special, name); 215 } 216 BEGIN { 217 arg0special=""; 218 } 219 END { 220 printf("\n/* Special cases: */\n#include <sys/buf.h>\n"); 221 argc=1; 222 argtype[0]="struct buf *"; 223 argname[0]="bp"; 224 arg0special="->b_vp"; 225 name="vop_strategy"; 226 doit(); 227 name="vop_bwrite"; 228 doit(); 229 } 230 '"$awk_parser" | sed -e "$anal_retentive" 231 232 # End stuff 233 echo ' 234 /* End of special cases. */' 235 echo '' 236 echo '#endif /* !_SYS_VNODE_IF_H_ */' 237 238 # 239 # Redirect stdout to the C file. 240 # 241 echo "$0: Creating $out_c" 1>&2 242 exec > $out_c 243 244 # Begin stuff 245 echo -n "$warning" | sed -e 's/\$//g;s/@/\$/g' 246 echo "" 247 echo -n "$copyright" 248 echo ' 249 #include <sys/param.h> 250 #include <sys/mount.h> 251 #include <sys/vnode.h> 252 253 struct vnodeop_desc vop_default_desc = { 254 0, 255 "default", 256 0, 257 NULL, 258 VDESC_NO_OFFSET, 259 VDESC_NO_OFFSET, 260 VDESC_NO_OFFSET, 261 VDESC_NO_OFFSET, 262 NULL, 263 }; 264 ' 265 266 # Body stuff 267 sed -e "$sed_prep" $src | $awk ' 268 function do_offset(typematch) { 269 for (i=0; i<argc; i++) { 270 if (argtype[i] == typematch) { 271 printf("\tVOPARG_OFFSETOF(struct %s_args, a_%s),\n", 272 name, argname[i]); 273 return i; 274 }; 275 }; 276 print "\tVDESC_NO_OFFSET,"; 277 return -1; 278 } 279 280 function doit() { 281 # Define offsets array 282 printf("\nint %s_vp_offsets[] = {\n", name); 283 for (i=0; i<argc; i++) { 284 if (argtype[i] == "struct vnode *") { 285 printf ("\tVOPARG_OFFSETOF(struct %s_args,a_%s),\n", 286 name, argname[i]); 287 } 288 } 289 print "\tVDESC_NO_OFFSET"; 290 print "};"; 291 # Define F_desc 292 printf("struct vnodeop_desc %s_desc = {\n", name); 293 # offset 294 printf ("\t0,\n"); 295 # printable name 296 printf ("\t\"%s\",\n", name); 297 # flags 298 printf("\t0"); 299 vpnum = 0; 300 for (i=0; i<argc; i++) { 301 if (willrele[i]) { 302 if (willrele[i] == 2) { 303 word = "UNLOCK"; 304 } else if (willrele[i] == 3) { 305 word = "PUT"; 306 } else { 307 word = "RELE"; 308 } 309 if (argdir[i] ~ /OUT/) { 310 printf(" | VDESC_VPP_WILL%s", word); 311 } else { 312 printf(" | VDESC_VP%s_WILL%s", vpnum, word); 313 }; 314 vpnum++; 315 } 316 } 317 print ","; 318 # vp offsets 319 printf ("\t%s_vp_offsets,\n", name); 320 # vpp (if any) 321 do_offset("struct vnode **"); 322 # cred (if any) 323 do_offset("struct ucred *"); 324 # proc (if any) 325 do_offset("struct proc *"); 326 # componentname 327 do_offset("struct componentname *"); 328 # transport layer information 329 printf ("\tNULL,\n};\n"); 330 } 331 END { 332 printf("\n/* Special cases: */\n"); 333 argc=1; 334 argdir[0]="IN"; 335 argtype[0]="struct buf *"; 336 argname[0]="bp"; 337 willrele[0]=0; 338 name="vop_strategy"; 339 doit(); 340 name="vop_bwrite"; 341 doit(); 342 } 343 '"$awk_parser" | sed -e "$anal_retentive" 344 345 # End stuff 346 echo ' 347 /* End of special cases. */' 348 349 # Add the vfs_op_descs array to the C file. 350 # Begin stuff 351 echo ' 352 struct vnodeop_desc *vfs_op_descs[] = { 353 &vop_default_desc, /* MUST BE FIRST */ 354 &vop_strategy_desc, /* XXX: SPECIAL CASE */ 355 &vop_bwrite_desc, /* XXX: SPECIAL CASE */ 356 ' 357 358 # Body stuff 359 sed -e "$sed_prep" $src | $awk ' 360 function doit() { 361 printf("\t&%s_desc,\n", name); 362 } 363 '"$awk_parser" 364 365 # End stuff 366 echo ' NULL 367 }; 368 ' 369 370 exit 0 371 372 # Local Variables: 373 # tab-width: 4 374 # End: 375
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