1#!/usr/bin/awk -f 2 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# 4. Neither the name of the University nor the names of its contributors 16# may be used to endorse or promote products derived from this software 17# without specific prior written permission. 18# 19# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22# ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29# SUCH DAMAGE. 30 31# 32# @(#)vnode_if.sh 8.1 (Berkeley) 6/10/93 33# $FreeBSD$ 34# 35# Script to produce VFS front-end sugar. 36# 37# usage: vnode_if.awk <srcfile> [-c | -h] 38# (where <srcfile> is currently /sys/kern/vnode_if.src) 39# 40 41function usage() 42{ 43 print "usage: vnode_if.awk <srcfile> [-c|-h|-p|-q]"; 44 exit 1; 45} 46 47function die(msg, what) 48{ 49 printf msg "\n", what > "/dev/stderr"; 50 exit 1; 51} 52 53function t_spc(type) 54{ 55 # Append a space if the type is not a pointer 56 return (type ~ /\*$/) ? type : type " "; 57} 58 59# These are just for convenience ... 60function printc(s) {print s > cfile;} 61function printh(s) {print s > hfile;} 62function printp(s) {print s > pfile;} 63function printq(s) {print s > qfile;} 64 65function add_debug_code(name, arg, pos, ind) 66{ 67 if (arg == "vpp") 68 star = "*"; 69 else 70 star = ""; 71 if (lockdata[name, arg, pos] && (lockdata[name, arg, pos] != "-")) { 72 if (arg ~ /^\*/) { 73 printc(ind"if ("substr(arg, 2)" != NULL) {"); 74 } 75 printc(ind"ASSERT_VI_UNLOCKED("star"a->a_"arg", \""uname"\");"); 76 # Add assertions for locking 77 if (lockdata[name, arg, pos] == "L") 78 printc(ind"ASSERT_VOP_LOCKED(" star "a->a_"arg", \""uname"\");"); 79 else if (lockdata[name, arg, pos] == "U") 80 printc(ind"ASSERT_VOP_UNLOCKED(" star "a->a_"arg", \""uname"\");"); 81 else if (lockdata[name, arg, pos] == "E") 82 printc(ind"ASSERT_VOP_ELOCKED(" star "a->a_"arg", \""uname"\");"); 83 else if (0) { 84 # XXX More checks! 85 } 86 if (arg ~ /^\*/) { 87 printc("ind}"); 88 } 89 } 90} 91 92function add_pre(name) 93{ 94 if (lockdata[name, "pre"]) { 95 printc("\t"lockdata[name, "pre"]"(a);"); 96 } 97} 98 99function add_post(name) 100{ 101 if (lockdata[name, "post"]) { 102 printc("\t"lockdata[name, "post"]"(a, rc);"); 103 } 104} 105 106function find_arg_with_type (type) 107{ 108 for (jj = 0; jj < numargs; jj++) { 109 if (types[jj] == type) { 110 return "VOPARG_OFFSETOF(struct " \ 111 name "_args,a_" args[jj] ")"; 112 } 113 } 114 115 return "VDESC_NO_OFFSET"; 116} 117 118BEGIN{ 119 120# Process the command line 121for (i = 1; i < ARGC; i++) { 122 arg = ARGV[i]; 123 if (arg !~ /^-[chpq]+$/ && arg !~ /\.src$/) 124 usage(); 125 if (arg ~ /^-.*c/) 126 cfile = "vnode_if.c"; 127 if (arg ~ /^-.*h/) 128 hfile = "vnode_if.h"; 129 if (arg ~ /^-.*p/) 130 pfile = "vnode_if_newproto.h"; 131 if (arg ~ /^-.*q/) 132 qfile = "vnode_if_typedef.h"; 133 if (arg ~ /\.src$/) 134 srcfile = arg; 135} 136ARGC = 1; 137 138if (!cfile && !hfile && !pfile && !qfile) 139 exit 0; 140 141if (!srcfile) 142 usage(); 143 144common_head = \ 145 "/*\n" \ 146 " * This file is produced automatically.\n" \ 147 " * Do not modify anything in here by hand.\n" \ 148 " *\n" \ 149 " * Created from $FreeBSD$\n" \ 150 " */\n" \ 151 "\n"; 152 153if (pfile) { 154 printp(common_head) 155 printp("struct vop_vector {") 156 printp("\tstruct vop_vector\t*vop_default;") 157 printp("\tvop_bypass_t\t*vop_bypass;") 158} 159 160if (qfile) { 161 printq(common_head) 162} 163 164if (hfile) { 165 printh(common_head "extern struct vnodeop_desc vop_default_desc;"); 166 printh("#include \"vnode_if_typedef.h\"") 167 printh("#include \"vnode_if_newproto.h\"") 168} 169 170if (cfile) { 171 printc(common_head \ 172 "#include <sys/param.h>\n" \ 173 "#include <sys/event.h>\n" \ 174 "#include <sys/mount.h>\n" \ 175 "#include <sys/systm.h>\n" \ 176 "#include <sys/vnode.h>\n" \ 177 "\n" \ 178 "struct vnodeop_desc vop_default_desc = {\n" \ 179 " \"default\",\n" \ 180 " 0,\n" \ 181 " (vop_bypass_t *)vop_panic,\n" \ 182 " NULL,\n" \ 183 " VDESC_NO_OFFSET,\n" \ 184 " VDESC_NO_OFFSET,\n" \ 185 " VDESC_NO_OFFSET,\n" \ 186 " VDESC_NO_OFFSET,\n" \ 187 "};\n"); 188} 189 190while ((getline < srcfile) > 0) { 191 if (NF == 0) 192 continue; 193 if ($1 ~ /^#%/) { 194 if (NF != 6 || $1 != "#%" || \ 195 $2 !~ /^[a-z]+$/ || $3 !~ /^[a-z]+$/ || \ 196 $4 !~ /^.$/ || $5 !~ /^.$/ || $6 !~ /^.$/) 197 continue; 198 lockdata["vop_" $2, $3, "Entry"] = $4; 199 lockdata["vop_" $2, $3, "OK"] = $5; 200 lockdata["vop_" $2, $3, "Error"] = $6; 201 continue; 202 } 203 204 if ($1 ~ /^#!/) { 205 if (NF != 4 || $1 != "#!") 206 continue; 207 if ($3 != "pre" && $3 != "post") 208 continue; 209 lockdata["vop_" $2, $3] = $4; 210 continue; 211 } 212 if ($1 ~ /^#/) 213 continue; 214 215 # Get the function name. 216 name = $1; 217 uname = toupper(name); 218 219 # Start constructing a ktrpoint string 220 ctrstr = "\"" uname; 221 # Get the function arguments. 222 for (numargs = 0; ; ++numargs) { 223 if ((getline < srcfile) <= 0) { 224 die("Unable to read through the arguments for \"%s\"", 225 name); 226 } 227 if ($1 ~ /^\};/) 228 break; 229 230 # Delete comments, if any. 231 gsub (/\/\*.*\*\//, ""); 232 233 # Condense whitespace and delete leading/trailing space. 234 gsub(/[[:space:]]+/, " "); 235 sub(/^ /, ""); 236 sub(/ $/, ""); 237 238 # Pick off direction. 239 if ($1 != "INOUT" && $1 != "IN" && $1 != "OUT") 240 die("No IN/OUT direction for \"%s\".", $0); 241 dirs[numargs] = $1; 242 sub(/^[A-Z]* /, ""); 243 244 if ((reles[numargs] = $1) == "WILLRELE") 245 sub(/^[A-Z]* /, ""); 246 else 247 reles[numargs] = "WONTRELE"; 248 249 # kill trailing ; 250 if (sub(/;$/, "") < 1) 251 die("Missing end-of-line ; in \"%s\".", $0); 252 253 # pick off variable name 254 if ((argp = match($0, /[A-Za-z0-9_]+$/)) < 1) 255 die("Missing var name \"a_foo\" in \"%s\".", $0); 256 args[numargs] = substr($0, argp); 257 $0 = substr($0, 1, argp - 1); 258 259 # what is left must be type 260 # remove trailing space (if any) 261 sub(/ $/, ""); 262 types[numargs] = $0; 263 264 # We can do a maximum of 6 arguments to CTR* 265 if (numargs <= 6) { 266 if (numargs == 0) 267 ctrstr = ctrstr "(" args[numargs]; 268 else 269 ctrstr = ctrstr ", " args[numargs]; 270 if (types[numargs] ~ /\*/) 271 ctrstr = ctrstr " 0x%lX"; 272 else 273 ctrstr = ctrstr " %ld"; 274 } 275 } 276 if (numargs > 6) 277 ctrargs = 6; 278 else 279 ctrargs = numargs; 280 ctrstr = "\tCTR" ctrargs "(KTR_VOP,\n\t " ctrstr ")\",\n\t "; 281 ctrstr = ctrstr "a->a_" args[0]; 282 for (i = 1; i < ctrargs; ++i) 283 ctrstr = ctrstr ", a->a_" args[i]; 284 ctrstr = ctrstr ");"; 285 286 if (pfile) { 287 printp("\t"name"_t\t*"name";") 288 } 289 if (qfile) { 290 printq("struct "name"_args;") 291 printq("typedef int "name"_t(struct "name"_args *);\n") 292 } 293 294 if (hfile) { 295 # Print out the vop_F_args structure. 296 printh("struct "name"_args {\n\tstruct vop_generic_args a_gen;"); 297 for (i = 0; i < numargs; ++i) 298 printh("\t" t_spc(types[i]) "a_" args[i] ";"); 299 printh("};"); 300 printh(""); 301 302 # Print out extern declaration. 303 printh("extern struct vnodeop_desc " name "_desc;"); 304 printh(""); 305 306 # Print out function prototypes. 307 printh("int " uname "_AP(struct " name "_args *);"); 308 printh("int " uname "_APV(struct vop_vector *vop, struct " name "_args *);"); 309 printh(""); 310 printh("static __inline int " uname "("); 311 for (i = 0; i < numargs; ++i) { 312 printh("\t" t_spc(types[i]) args[i] \ 313 (i < numargs - 1 ? "," : ")")); 314 } 315 printh("{"); 316 printh("\tstruct " name "_args a;"); 317 printh(""); 318 printh("\ta.a_gen.a_desc = &" name "_desc;"); 319 for (i = 0; i < numargs; ++i) 320 printh("\ta.a_" args[i] " = " args[i] ";"); 321 printh("\treturn (" uname "_APV("args[0]"->v_op, &a));"); 322 printh("}"); 323 324 printh(""); 325 } 326 327 if (cfile) { 328 # Print out the vop_F_vp_offsets structure. This all depends 329 # on naming conventions and nothing else. 330 printc("static int " name "_vp_offsets[] = {"); 331 # as a side effect, figure out the releflags 332 releflags = ""; 333 vpnum = 0; 334 for (i = 0; i < numargs; i++) { 335 if (types[i] == "struct vnode *") { 336 printc("\tVOPARG_OFFSETOF(struct " name \ 337 "_args,a_" args[i] "),"); 338 if (reles[i] == "WILLRELE") { 339 releflags = releflags \ 340 "|VDESC_VP" vpnum "_WILLRELE"; 341 } 342 vpnum++; 343 } 344 } 345 346 sub(/^\|/, "", releflags); 347 printc("\tVDESC_NO_OFFSET"); 348 printc("};"); 349 350 # Print out function. 351 printc("\nint\n" uname "_AP(struct " name "_args *a)"); 352 printc("{"); 353 printc(""); 354 printc("\treturn(" uname "_APV(a->a_" args[0] "->v_op, a));"); 355 printc("}"); 356 printc("\nint\n" uname "_APV(struct vop_vector *vop, struct " name "_args *a)"); 357 printc("{"); 358 printc("\tint rc;"); 359 printc(""); 360 printc("\tVNASSERT(a->a_gen.a_desc == &" name "_desc, a->a_" args[0]","); 361 printc("\t (\"Wrong a_desc in " name "(%p, %p)\", a->a_" args[0]", a));"); 362 printc("\twhile(vop != NULL && \\"); 363 printc("\t vop->"name" == NULL && vop->vop_bypass == NULL)") 364 printc("\t\tvop = vop->vop_default;") 365 printc("\tVNASSERT(vop != NULL, a->a_" args[0]", (\"No "name"(%p, %p)\", a->a_" args[0]", a));") 366 for (i = 0; i < numargs; ++i) 367 add_debug_code(name, args[i], "Entry", "\t"); 368 add_pre(name); 369 printc("\tif (vop->"name" != NULL)") 370 printc("\t\trc = vop->"name"(a);") 371 printc("\telse") 372 printc("\t\trc = vop->vop_bypass(&a->a_gen);") 373 printc(ctrstr); 374 printc("\tif (rc == 0) {"); 375 for (i = 0; i < numargs; ++i) 376 add_debug_code(name, args[i], "OK", "\t\t"); 377 printc("\t} else {"); 378 for (i = 0; i < numargs; ++i) 379 add_debug_code(name, args[i], "Error", "\t\t"); 380 printc("\t}"); 381 add_post(name); 382 printc("\treturn (rc);"); 383 printc("}\n"); 384 385 # Print out the vnodeop_desc structure. 386 printc("struct vnodeop_desc " name "_desc = {"); 387 # printable name 388 printc("\t\"" name "\","); 389 # flags 390 vppwillrele = ""; 391 for (i = 0; i < numargs; i++) { 392 if (types[i] == "struct vnode **" && \ 393 reles[i] == "WILLRELE") { 394 vppwillrele = "|VDESC_VPP_WILLRELE"; 395 } 396 } 397 398 if (!releflags) 399 releflags = "0"; 400 printc("\t" releflags vppwillrele ","); 401 402 # function to call 403 printc("\t(vop_bypass_t *)" uname "_AP,"); 404 # vp offsets 405 printc("\t" name "_vp_offsets,"); 406 # vpp (if any) 407 printc("\t" find_arg_with_type("struct vnode **") ","); 408 # cred (if any) 409 printc("\t" find_arg_with_type("struct ucred *") ","); 410 # thread (if any) 411 printc("\t" find_arg_with_type("struct thread *") ","); 412 # componentname 413 printc("\t" find_arg_with_type("struct componentname *") ","); 414 # transport layer information 415 printc("};\n"); 416 } 417} 418 419if (pfile) 420 printp("};") 421 422if (hfile) 423 close(hfile); 424if (cfile) 425 close(cfile); 426if (pfile) 427 close(pfile); 428close(srcfile); 429 430exit 0; 431 432} 433