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# 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# @(#)vnode_if.sh 8.1 (Berkeley) 6/10/93 36# $FreeBSD$ 37# 38# Script to produce VFS front-end sugar. 39# 40# usage: vnode_if.awk <srcfile> [-c | -h] 41# (where <srcfile> is currently /sys/kern/vnode_if.src) 42# 43 44function usage() 45{ 46 print "usage: vnode_if.awk <srcfile> [-c|-h]"; 47 exit 1; 48} 49 50function die(msg, what) 51{ 52 printf msg "\n", what > "/dev/stderr"; 53 exit 1; 54} 55 56function t_spc(type) 57{ 58 # Append a space if the type is not a pointer 59 return (type ~ /\*$/) ? type : type " "; 60} 61 62# These are just for convenience ... 63function printc(s) {print s > cfile;} 64function printh(s) {print s > hfile;} 65 66function add_debug_code(name, arg, pos) 67{ 68 if (lockdata[name, arg, pos]) { 69 printh("\tASSERT_VI_UNLOCKED("arg");"); 70 # Add assertions for locking 71 if (lockdata[name, arg, pos] == "L") 72 printh("\tASSERT_VOP_LOCKED("arg", \""uname"\");"); 73 else if (lockdata[name, arg, pos] == "U") 74 printh("\tASSERT_VOP_UNLOCKED("arg", \""uname"\");"); 75 else if (0) { 76 # XXX More checks! 77 } 78 } 79} 80 81function add_debug_pre(name) 82{ 83 if (lockdata[name, "pre"]) { 84 printh("#ifdef DEBUG_VFS_LOCKS"); 85 printh("\t"lockdata[name, "pre"]"(&a);"); 86 printh("#endif"); 87 } 88} 89 90function add_debug_post(name) 91{ 92 if (lockdata[name, "post"]) { 93 printh("#ifdef DEBUG_VFS_LOCKS"); 94 printh("\t"lockdata[name, "post"]"(&a, rc);"); 95 printh("#endif"); 96 } 97} 98 99function find_arg_with_type (type) 100{ 101 for (jj = 0; jj < numargs; jj++) { 102 if (types[jj] == type) { 103 return "VOPARG_OFFSETOF(struct " \ 104 name "_args,a_" args[jj] ")"; 105 } 106 } 107 108 return "VDESC_NO_OFFSET"; 109} 110 111BEGIN{ 112 113# Process the command line 114for (i = 1; i < ARGC; i++) { 115 arg = ARGV[i]; 116 if (arg !~ /^-[ch]+$/ && arg !~ /\.src$/) 117 usage(); 118 if (arg ~ /^-.*c/) 119 cfile = "vnode_if.c"; 120 if (arg ~ /^-.*h/) 121 hfile = "vnode_if.h"; 122 if (arg ~ /\.src$/) 123 srcfile = arg; 124} 125ARGC = 1; 126 127if (!cfile && !hfile) 128 exit 0; 129 130if (!srcfile) 131 usage(); 132 133common_head = \ 134 "/*\n" \ 135 " * This file is produced automatically.\n" \ 136 " * Do not modify anything in here by hand.\n" \ 137 " *\n" \ 138 " * Created from $FreeBSD$\n" \ 139 " */\n" \ 140 "\n"; 141 142if (hfile) 143 printh(common_head "extern struct vnodeop_desc vop_default_desc;"); 144 145if (cfile) { 146 printc(common_head \ 147 "#include <sys/param.h>\n" \ 148 "#include <sys/systm.h>\n" \ 149 "#include <sys/vnode.h>\n" \ 150 "\n" \ 151 "struct vnodeop_desc vop_default_desc = {\n" \ 152 " 1,\t\t\t/* special case, vop_default => 1 */\n" \ 153 " \"default\",\n" \ 154 " 0,\n" \ 155 " NULL,\n" \ 156 " VDESC_NO_OFFSET,\n" \ 157 " VDESC_NO_OFFSET,\n" \ 158 " VDESC_NO_OFFSET,\n" \ 159 " VDESC_NO_OFFSET,\n" \ 160 " NULL,\n" \ 161 "};\n"); 162} 163 164while ((getline < srcfile) > 0) { 165 if (NF == 0) 166 continue; 167 if ($1 ~ /^#%/) { 168 if (NF != 6 || $1 != "#%" || \ 169 $2 !~ /^[a-z]+$/ || $3 !~ /^[a-z]+$/ || \ 170 $4 !~ /^.$/ || $5 !~ /^.$/ || $6 !~ /^.$/) 171 continue; 172 if ($3 == "vpp") 173 $3 = "*vpp"; 174 lockdata["vop_" $2, $3, "Entry"] = $4; 175 lockdata["vop_" $2, $3, "OK"] = $5; 176 lockdata["vop_" $2, $3, "Error"] = $6; 177 continue; 178 } 179 180 if ($1 ~ /^#!/) { 181 if (NF != 4 || $1 != "#!") 182 continue; 183 if ($3 != "pre" && $3 != "post") 184 continue; 185 lockdata["vop_" $2, $3] = $4; 186 continue; 187 } 188 if ($1 ~ /^#/) 189 continue; 190 191 # Get the function name. 192 name = $1; 193 uname = toupper(name); 194 # Get the function arguments. 195 for (numargs = 0; ; ++numargs) { 196 if ((getline < srcfile) <= 0) { 197 die("Unable to read through the arguments for \"%s\"", 198 name); 199 } 200 if ($1 ~ /^\};/) 201 break; 202 203 # Delete comments, if any. 204 gsub (/\/\*.*\*\//, ""); 205 206 # Condense whitespace and delete leading/trailing space. 207 gsub(/[[:space:]]+/, " "); 208 sub(/^ /, ""); 209 sub(/ $/, ""); 210 211 # Pick off direction. 212 if ($1 != "INOUT" && $1 != "IN" && $1 != "OUT") 213 die("No IN/OUT direction for \"%s\".", $0); 214 dirs[numargs] = $1; 215 sub(/^[A-Z]* /, ""); 216 217 if ((reles[numargs] = $1) == "WILLRELE") 218 sub(/^[A-Z]* /, ""); 219 else 220 reles[numargs] = "WONTRELE"; 221 222 # kill trailing ; 223 if (sub(/;$/, "") < 1) 224 die("Missing end-of-line ; in \"%s\".", $0); 225 226 # pick off variable name 227 if ((argp = match($0, /[A-Za-z0-9_]+$/)) < 1) 228 die("Missing var name \"a_foo\" in \"%s\".", $0); 229 args[numargs] = substr($0, argp); 230 $0 = substr($0, 1, argp - 1); 231 232 # what is left must be type 233 # remove trailing space (if any) 234 sub(/ $/, ""); 235 types[numargs] = $0; 236 } 237 238 if (hfile) { 239 # Print out the vop_F_args structure. 240 printh("struct "name"_args {\n\tstruct vnodeop_desc *a_desc;"); 241 for (i = 0; i < numargs; ++i) 242 printh("\t" t_spc(types[i]) "a_" args[i] ";"); 243 printh("};"); 244 245 # Print out extern declaration. 246 printh("extern struct vnodeop_desc " name "_desc;"); 247 248 # Print out function. 249 printh("static __inline int " uname "("); 250 for (i = 0; i < numargs; ++i) { 251 printh("\t" t_spc(types[i]) args[i] \ 252 (i < numargs - 1 ? "," : ")")); 253 } 254 printh("{\n\tstruct " name "_args a;"); 255 printh("\tint rc;"); 256 printh("\ta.a_desc = VDESC(" name ");"); 257 for (i = 0; i < numargs; ++i) 258 printh("\ta.a_" args[i] " = " args[i] ";"); 259 for (i = 0; i < numargs; ++i) 260 add_debug_code(name, args[i], "Entry"); 261 add_debug_pre(name); 262 printh("\trc = VCALL(" args[0] ", VOFFSET(" name "), &a);"); 263 printh("if (rc == 0) {"); 264 for (i = 0; i < numargs; ++i) 265 add_debug_code(name, args[i], "OK"); 266 printh("} else {"); 267 for (i = 0; i < numargs; ++i) 268 add_debug_code(name, args[i], "Error"); 269 printh("}"); 270 add_debug_post(name); 271 printh("\treturn (rc);\n}"); 272 } 273 274 if (cfile) { 275 # Print out the vop_F_vp_offsets structure. This all depends 276 # on naming conventions and nothing else. 277 printc("static int " name "_vp_offsets[] = {"); 278 # as a side effect, figure out the releflags 279 releflags = ""; 280 vpnum = 0; 281 for (i = 0; i < numargs; i++) { 282 if (types[i] == "struct vnode *") { 283 printc("\tVOPARG_OFFSETOF(struct " name \ 284 "_args,a_" args[i] "),"); 285 if (reles[i] == "WILLRELE") { 286 releflags = releflags \ 287 "|VDESC_VP" vpnum "_WILLRELE"; 288 } 289 vpnum++; 290 } 291 } 292 293 sub(/^\|/, "", releflags); 294 printc("\tVDESC_NO_OFFSET"); 295 printc("};"); 296 297 # Print out the vnodeop_desc structure. 298 printc("struct vnodeop_desc " name "_desc = {"); 299 # offset 300 printc("\t0,"); 301 # printable name 302 printc("\t\"" name "\","); 303 # flags 304 vppwillrele = ""; 305 for (i = 0; i < numargs; i++) { 306 if (types[i] == "struct vnode **" && \ 307 reles[i] == "WILLRELE") { 308 vppwillrele = "|VDESC_VPP_WILLRELE"; 309 } 310 } 311 312 if (!releflags) 313 releflags = "0"; 314 printc("\t" releflags vppwillrele ","); 315 316 # vp offsets 317 printc("\t" name "_vp_offsets,"); 318 # vpp (if any) 319 printc("\t" find_arg_with_type("struct vnode **") ","); 320 # cred (if any) 321 printc("\t" find_arg_with_type("struct ucred *") ","); 322 # thread (if any) 323 printc("\t" find_arg_with_type("struct thread *") ","); 324 # componentname 325 printc("\t" find_arg_with_type("struct componentname *") ","); 326 # transport layer information 327 printc("\tNULL,\n};\n"); 328 } 329} 330 331if (hfile) 332 close(hfile); 333if (cfile) 334 close(cfile); 335close(srcfile); 336 337exit 0; 338 339} 340