434 lines
10 KiB
Bash
434 lines
10 KiB
Bash
#!/bin/sh -
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copyright="\
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/*
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* Copyright (c) 1992, 1993, 1994, 1995
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS \`\`AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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"
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SCRIPT_ID='$NetBSD: vnode_if.sh,v 1.49 2008/05/19 17:06:02 ad Exp $'
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# Script to produce VFS front-end sugar.
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#
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# usage: vnode_if.sh srcfile
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# (where srcfile is currently /sys/kern/vnode_if.src)
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#
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if [ $# -ne 1 ] ; then
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echo 'usage: vnode_if.sh srcfile'
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exit 1
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fi
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# Name and revision of the source file.
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src=$1
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SRC_ID=`head -1 $src | sed -e 's/.*\$\(.*\)\$.*/\1/'`
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# Names of the created files.
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out_c=vnode_if.c
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out_h=../sys/vnode_if.h
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# Awk program (must support nawk extensions)
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# Use "awk" at Berkeley, "nawk" or "gawk" elsewhere.
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awk=${AWK:-awk}
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# Does this awk have a "toupper" function? (i.e. is it GNU awk)
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isgawk=`$awk 'BEGIN { print toupper("true"); exit; }' 2>/dev/null`
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# If this awk does not define "toupper" then define our own.
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if [ "$isgawk" = TRUE ] ; then
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# GNU awk provides it.
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toupper=
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else
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# Provide our own toupper()
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toupper='
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function toupper(str) {
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_toupper_cmd = "echo "str" |tr a-z A-Z"
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_toupper_cmd | getline _toupper_str;
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close(_toupper_cmd);
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return _toupper_str;
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}'
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fi
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#
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# This is the common part of all awk programs that read $src
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# This parses the input for one function into the arrays:
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# argdir, argtype, argname, willrele
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# and calls "doit()" to generate output for the function.
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#
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# Input to this parser is pre-processed slightly by sed
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# so this awk parser doesn't have to work so hard. The
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# changes done by the sed pre-processing step are:
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# insert a space beween * and pointer name
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# replace semicolons with spaces
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#
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sed_prep='s:\*\([^\*/]\):\* \1:g
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s/;/ /'
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awk_parser='
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# Comment line
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/^#/ { next; }
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# First line of description
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/^vop_/ {
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name=$1;
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argc=0;
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willmake=-1;
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next;
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}
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# Last line of description
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/^}/ {
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doit();
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next;
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}
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# Middle lines of description
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{
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argdir[argc] = $1; i=2;
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if ($2 == "LOCKED=YES") {
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lockstate[argc] = 1;
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i++;
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} else if ($2 == "LOCKED=NO") {
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lockstate[argc] = 0;
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i++;
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} else
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lockstate[argc] = -1;
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if ($2 == "WILLRELE" ||
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$3 == "WILLRELE") {
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willrele[argc] = 1;
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i++;
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} else if ($2 == "WILLUNLOCK" ||
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$3 == "WILLUNLOCK") {
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willrele[argc] = 2;
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i++;
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} else if ($2 == "WILLPUT" ||
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$3 == "WILLPUT") {
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willrele[argc] = 3;
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i++;
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} else
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willrele[argc] = 0;
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if ($2 == "WILLMAKE") {
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willmake=argc;
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i++;
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}
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argtype[argc] = $i; i++;
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while (i < NF) {
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argtype[argc] = argtype[argc]" "$i;
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i++;
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}
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argname[argc] = $i;
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argc++;
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next;
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}
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'
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# This is put before the copyright on each generated file.
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warning="\
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/* @NetBSD@ */
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/*
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* Warning: DO NOT EDIT! This file is automatically generated!
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* (Modifications made here may easily be lost!)
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*
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* Created from the file:
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* ${SRC_ID}
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* by the script:
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* ${SCRIPT_ID}
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*/
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"
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# This is to satisfy McKusick (get rid of evil spaces 8^)
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anal_retentive='s:\([^/]\*\) :\1:g'
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#
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# Redirect stdout to the H file.
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#
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echo "$0: Creating $out_h" 1>&2
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exec > $out_h
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# Begin stuff
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echo -n "$warning" | sed -e 's/\$//g;s/@/\$/g;s/ $//'
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echo ""
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echo -n "$copyright"
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echo ''
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echo '#ifndef _SYS_VNODE_IF_H_'
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echo '#define _SYS_VNODE_IF_H_'
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echo ''
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echo '#ifdef _KERNEL_OPT'
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echo '#include "opt_vnode_lockdebug.h"'
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echo '#endif /* _KERNEL_OPT */'
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echo '
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extern const struct vnodeop_desc vop_default_desc;
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'
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# Body stuff
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# This awk program needs toupper() so define it if necessary.
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sed -e "$sed_prep" $src | $awk "$toupper"'
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function doit() {
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# Declare arg struct, descriptor.
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printf("\n#define %s_DESCOFFSET %d\n", toupper(name), vop_offset++);
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printf("struct %s_args {\n", name);
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printf("\tconst struct vnodeop_desc * a_desc;\n");
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for (i=0; i<argc; i++) {
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printf("\t%s a_%s;\n", argtype[i], argname[i]);
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}
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printf("};\n");
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printf("extern const struct vnodeop_desc %s_desc;\n", name);
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# Prototype it.
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protoarg = sprintf("int %s(", toupper(name));
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protolen = length(protoarg);
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printf("%s", protoarg);
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for (i=0; i<argc; i++) {
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protoarg = sprintf("%s", argtype[i]);
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if (i < (argc-1)) protoarg = (protoarg ", ");
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arglen = length(protoarg);
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if ((protolen + arglen) > 77) {
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protoarg = ("\n " protoarg);
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arglen += 4;
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protolen = 0;
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}
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printf("%s", protoarg);
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protolen += arglen;
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}
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printf(");\n");
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}
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BEGIN {
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arg0special="";
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vop_offset = 1; # start at 1, to count the 'default' op
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printf("\n/* Special cases: */\n#include <sys/buf.h>\n");
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printf("#ifndef _KERNEL\n#include <stdbool.h>\n#endif\n\n");
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argc=1;
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argtype[0]="struct buf *";
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argname[0]="bp";
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lockstate[0] = -1;
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arg0special="->b_vp";
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name="vop_bwrite";
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doit();
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printf("/* End of special cases */\n");
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}
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END {
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printf("\n#define VNODE_OPS_COUNT\t%d\n", vop_offset);
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}
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'"$awk_parser" | sed -e "$anal_retentive"
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# End stuff
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echo '
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/* End of special cases. */'
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echo ''
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echo '#endif /* !_SYS_VNODE_IF_H_ */'
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#
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# Redirect stdout to the C file.
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#
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echo "$0: Creating $out_c" 1>&2
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exec > $out_c
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# Begin stuff
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echo -n "$warning" | sed -e 's/\$//g;s/@/\$/g;s/ $//'
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echo ""
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echo -n "$copyright"
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echo "
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, \"\$NetBSD\$\");
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"
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echo '
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#include "opt_vnode_lockdebug.h"'
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echo '
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#include <sys/param.h>
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#include <sys/mount.h>
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#include <sys/buf.h>
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#include <sys/vnode.h>
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#include <sys/lock.h>
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const struct vnodeop_desc vop_default_desc = {
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0,
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"default",
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0,
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NULL,
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VDESC_NO_OFFSET,
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VDESC_NO_OFFSET,
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VDESC_NO_OFFSET,
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NULL,
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};
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'
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# Body stuff
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sed -e "$sed_prep" $src | $awk '
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function do_offset(typematch) {
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for (i=0; i<argc; i++) {
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if (argtype[i] == typematch) {
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printf("\tVOPARG_OFFSETOF(struct %s_args, a_%s),\n",
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name, argname[i]);
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return i;
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};
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};
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print "\tVDESC_NO_OFFSET,";
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return -1;
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}
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function doit() {
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# Define offsets array
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printf("\nconst int %s_vp_offsets[] = {\n", name);
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for (i=0; i<argc; i++) {
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if (argtype[i] == "struct vnode *") {
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printf ("\tVOPARG_OFFSETOF(struct %s_args,a_%s),\n",
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name, argname[i]);
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}
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}
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print "\tVDESC_NO_OFFSET";
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print "};";
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# Define F_desc
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printf("const struct vnodeop_desc %s_desc = {\n", name);
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# offset
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printf ("\t%s_DESCOFFSET,\n", toupper(name));
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# printable name
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printf ("\t\"%s\",\n", name);
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# flags
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printf("\t0");
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vpnum = 0;
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for (i=0; i<argc; i++) {
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if (willrele[i]) {
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if (willrele[i] == 2) {
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word = "UNLOCK";
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} else if (willrele[i] == 3) {
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word = "PUT";
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} else {
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word = "RELE";
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}
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if (argdir[i] ~ /OUT/) {
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printf(" | VDESC_VPP_WILL%s", word);
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} else {
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printf(" | VDESC_VP%s_WILL%s", vpnum, word);
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};
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vpnum++;
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}
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}
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print ",";
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# vp offsets
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printf ("\t%s_vp_offsets,\n", name);
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# vpp (if any)
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do_offset("struct vnode **");
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# cred (if any)
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do_offset("kauth_cred_t");
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# componentname
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do_offset("struct componentname *");
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# transport layer information
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printf ("\tNULL,\n};\n");
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# Define function.
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printf("int\n%s(", toupper(name));
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for (i=0; i<argc; i++) {
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printf("%s %s", argtype[i], argname[i]);
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if (i < (argc-1)) printf(",\n ");
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}
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printf(")\n");
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printf("{\n\tint error;\n\tbool mpsafe;\n\tstruct %s_args a;\n", name);
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printf("#ifdef VNODE_LOCKDEBUG\n");
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for (i=0; i<argc; i++) {
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if (lockstate[i] != -1)
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printf("\tint islocked_%s;\n", argname[i]);
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}
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printf("#endif\n");
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printf("\ta.a_desc = VDESC(%s);\n", name);
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for (i=0; i<argc; i++) {
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printf("\ta.a_%s = %s;\n", argname[i], argname[i]);
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if (lockstate[i] != -1) {
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printf("#ifdef VNODE_LOCKDEBUG\n");
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printf("\tislocked_%s = (%s->v_vflag & VV_LOCKSWORK) ? (VOP_ISLOCKED(%s) == LK_EXCLUSIVE) : %d;\n",
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argname[i], argname[i], argname[i], lockstate[i]);
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printf("\tif (islocked_%s != %d)\n", argname[i],
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lockstate[i]);
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printf("\t\tpanic(\"%s: %s: locked %%d, expected %%d\", islocked_%s, %d);\n", name, argname[i], argname[i], lockstate[i]);
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printf("#endif\n");
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}
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}
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printf("\tmpsafe = (%s%s->v_vflag & VV_MPSAFE);\n", argname[0], arg0special);
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printf("\tif (!mpsafe) { KERNEL_LOCK(1, curlwp); }\n");
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printf("\terror = (VCALL(%s%s, VOFFSET(%s), &a));\n",
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argname[0], arg0special, name);
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printf("\tif (!mpsafe) { KERNEL_UNLOCK_ONE(curlwp); }\n");
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if (willmake != -1) {
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printf("#ifdef DIAGNOSTIC\n");
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printf("\tif (error == 0)\n" \
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"\t\tKASSERT((*%s)->v_size != VSIZENOTSET\n" \
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"\t\t && (*%s)->v_writesize != VSIZENOTSET);\n",
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argname[willmake], argname[willmake]);
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printf("#endif /* DIAGNOSTIC */\n");
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}
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printf("\treturn error;\n}\n");
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}
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BEGIN {
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printf("\n/* Special cases: */\n");
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# start from 1 (vop_default is at 0)
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argc=1;
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willmake=-1;
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argdir[0]="IN";
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argtype[0]="struct buf *";
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argname[0]="bp";
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lockstate[0] = -1;
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arg0special="->b_vp";
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willrele[0]=0;
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name="vop_bwrite";
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doit();
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printf("\n/* End of special cases */\n");
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arg0special="";
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}
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'"$awk_parser" | sed -e "$anal_retentive"
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# End stuff
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echo '
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/* End of special cases. */'
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# Add the vfs_op_descs array to the C file.
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# Begin stuff
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echo '
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const struct vnodeop_desc * const vfs_op_descs[] = {
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&vop_default_desc, /* MUST BE FIRST */
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&vop_bwrite_desc, /* XXX: SPECIAL CASE */
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'
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# Body stuff
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sed -e "$sed_prep" $src | $awk '
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function doit() {
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printf("\t&%s_desc,\n", name);
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}
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'"$awk_parser"
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# End stuff
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echo ' NULL
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};
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'
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exit 0
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# Local Variables:
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# tab-width: 4
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# End:
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