3176a7fe12
lock specifications in kern/vnode_if.src. At present, this do not distinguish between exclusive and shared locks, and the kernel is so full of bugs in this area that running with auto-generation of assertions enabled makes DEBUG_VFS_LOCKS totally useless for anybody that has used it for anything prior to outputting automated assertions. Due to this, I made vnode_if.sh only output locking assertions if you have the environment variable DEBUG_ALL_VFS_LOCKS set to "YES". In order to actually use the assertions, you need to also add "options DEBUG_VFS_LOCKS" to your kernel config file. Urged to commit by: phk
328 lines
8.9 KiB
Awk
328 lines
8.9 KiB
Awk
#!/usr/bin/perl
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eval 'exec /usr/bin/perl -S $0 ${1+"$@"}'
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if $running_under_some_shell;
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#
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# Copyright (c) 1992, 1993
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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. All advertising materials mentioning features or use of this software
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# must display the following acknowledgement:
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# This product includes software developed by the University of
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# California, Berkeley and its contributors.
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# 4. 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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# @(#)vnode_if.sh 8.1 (Berkeley) 6/10/93
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# $FreeBSD$
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#
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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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my %lockdata;
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if ($#ARGV != 0) {
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print "usage: vnode_if.sh srcfile\n";
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exit(1);
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}
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# Name of the source file.
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$SRC=$ARGV[0];
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# Names of the created files.
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$CFILE='vnode_if.c';
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$HEADER='vnode_if.h';
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open(HEADER, ">$HEADER") || die "Unable to create $HEADER";
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open(CFILE, ">$CFILE") || die "Unable to create $CFILE";
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open(SRC, "<$SRC") || die "Unable to open input file";
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# Print out header information for vnode_if.h.
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print HEADER <<END_OF_LEADING_COMMENT
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/*
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* This file is produced automatically.
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* Do not modify anything in here by hand.
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*
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* Created from @(#)vnode_if.sh 8.1 (Berkeley) 6/10/93
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*/
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extern struct vnodeop_desc vop_default_desc;
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END_OF_LEADING_COMMENT
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;
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# Print out header information for vnode_if.c.
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print CFILE <<END_OF_LEADING_COMMENT
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/*
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* This file is produced automatically.
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* Do not modify anything in here by hand.
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*
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* Created from @(#)vnode_if.sh 8.1 (Berkeley) 6/10/93
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*/
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#include <sys/param.h>
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#include <sys/vnode.h>
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struct vnodeop_desc vop_default_desc = {
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1, /* special case, vop_default => 1 */
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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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VDESC_NO_OFFSET,
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NULL,
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};
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END_OF_LEADING_COMMENT
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;
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line: while (<SRC>) {
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chop; # strip record separator
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@Fld = split ' ';
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if (@Fld == 0) {
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next line;
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}
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if (/^#/) {
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if (!/^#%\s+([a-z]+)\s+([a-z]+)\s+(.)\s(.)\s(.)/) {
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next;
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}
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if (!defined($lockdata{"vop_$1"})) {
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$lockdata{"vop_$1"} = {};
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}
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$lockdata{"vop_$1"}->{$2} = {
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'Entry' => $3,
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'OK' => $4,
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'Error' => $5,
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};
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next;
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}
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# Get the function name.
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$name = $Fld[0];
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$uname = uc($name);
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# Get the function arguments.
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for ($numargs = 0; ; ++$numargs) {
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if ($ln = <SRC>) {
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chomp;
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} else {
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die "Unable to read through the arguments for \"$name\"";
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}
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if ($ln =~ /^\};/) {
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last;
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}
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# For the header file
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$a{$numargs} = $ln;
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# The rest of this loop is for the C file
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# Delete comments, if any.
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$ln =~ s/\/\*.*\*\///g;
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# Delete leading/trailing space.
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$ln =~ s/^\s*(.*?)\s*$/$1/;
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# Pick off direction.
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if ($ln =~ s/^INOUT\s+//) {
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$dir = 'INOUT';
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} elsif ($ln =~ s/^IN\s+//) {
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$dir = 'IN';
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} elsif ($ln =~ s/^OUT\s+//) {
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$dir = 'OUT';
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} else {
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die "No IN/OUT direction for \"$ln\".";
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}
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if ($ln =~ s/^WILLRELE\s+//) {
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$rele = 'WILLRELE';
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} else {
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$rele = 'WONTRELE';
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}
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# kill trailing ;
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if ($ln !~ s/;$//) {
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&bail("Missing end-of-line ; in \"$ln\".");
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}
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# pick off variable name
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if ($ln !~ s/([A-Za-z0-9_]+)$//) {
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&bail("Missing var name \"a_foo\" in \"$ln\".");
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}
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$arg = $1;
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# what is left must be type
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# (put clean it up some)
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$type = $ln;
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# condense whitespace
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$type =~ s/\s+/ /g;
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$type =~ s/^\s*(.*?)\s*$/$1/;
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$dirs{$numargs} = $dir;
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$reles{$numargs} = $rele;
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$types{$numargs} = $type;
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$args{$numargs} = $arg;
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}
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# Print out the vop_F_args structure.
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print HEADER "struct ${name}_args {\n\tstruct vnodeop_desc *a_desc;\n";
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for ($c2 = 0; $c2 < $numargs; ++$c2) {
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$a{$c2} =~ /^\s*(INOUT|OUT|IN)(\s+WILLRELE)?\s+(.*?)\s+(\**)(\S*\;)/;
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print HEADER "\t$3 $4a_$5\n",
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}
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print HEADER "};\n";
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# Print out extern declaration.
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print HEADER "extern struct vnodeop_desc ${name}_desc;\n";
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# Print out prototype.
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print HEADER "static __inline int ${uname} __P((\n";
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for ($c2 = 0; $c2 < $numargs; ++$c2) {
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$a{$c2} =~ /^\s*(INOUT|OUT|IN)(\s+WILLRELE)?\s+(.*?)\s+(\**\S*)\;/;
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print HEADER "\t$3 $4" .
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($c2 < $numargs-1 ? "," : "));") . "\n";
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}
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# Print out function.
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print HEADER "static __inline int ${uname}(";
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for ($c2 = 0; $c2 < $numargs; ++$c2) {
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$a{$c2} =~ /\**([^;\s]*)\;[^\s]*$/;
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print HEADER "$1" . ($c2 < $numargs - 1 ? ', ' : ")\n");
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}
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for ($c2 = 0; $c2 < $numargs; ++$c2) {
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$a{$c2} =~ /^\s*(INOUT|OUT|IN)(\s+WILLRELE)?\s+(.*?)\s+(\**\S*\;)/;
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print HEADER "\t$3 $4\n";
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}
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print HEADER "{\n\tstruct ${name}_args a;\n";
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print HEADER "\tint rc;\n";
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print HEADER "\ta.a_desc = VDESC(${name});\n";
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for ($c2 = 0; $c2 < $numargs; ++$c2) {
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$a{$c2} =~ /(\**)([^;\s]*)([^\s]*)$/;
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print HEADER "\ta.a_$2 = $2$3\n",
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}
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for ($c2 = 0; $c2 < $numargs; ++$c2) {
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if (!exists($args{$c2})) {
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die "Internal error";
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}
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if (exists($lockdata{$name}) &&
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exists($lockdata{$name}->{$args{$c2}})) {
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if ($ENV{'DEBUG_ALL_VFS_LOCKS'} =~ /yes/i) {
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# Add assertions for locking
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if ($lockdata{$name}->{$args{$c2}}->{Entry} eq "L") {
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print HEADER
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"\tASSERT_VOP_LOCKED($args{$c2}, \"$uname\");\n";
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} elsif ($lockdata{$name}->{$args{$c2}}->{Entry} eq "U") {
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print HEADER
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"\tASSERT_VOP_UNLOCKED($args{$c2}, \"$uname\");\n";
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} elsif (0) {
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# XXX More checks!
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}
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}
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}
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}
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$a{0} =~ /\s\**([^;\s]*);/;
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print HEADER "\trc = VCALL($1, VOFFSET(${name}), &a);\n";
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print HEADER "\treturn (rc);\n";
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print HEADER "}\n";
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# Print out the vop_F_vp_offsets structure. This all depends
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# on naming conventions and nothing else.
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printf CFILE "static int %s_vp_offsets[] = {\n", $name;
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# as a side effect, figure out the releflags
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$releflags = '';
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$vpnum = 0;
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for ($i = 0; $i < $numargs; $i++) {
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if ($types{$i} eq 'struct vnode *') {
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printf CFILE "\tVOPARG_OFFSETOF(struct %s_args,a_%s),\n",
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$name, $args{$i};
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if ($reles{$i} eq 'WILLRELE') {
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$releflags = $releflags . '|VDESC_VP' . $vpnum . '_WILLRELE';
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}
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$vpnum++;
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}
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}
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$releflags =~ s/^\|//;
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print CFILE "\tVDESC_NO_OFFSET\n";
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print CFILE "};\n";
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# Print out the vnodeop_desc structure.
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print CFILE "struct vnodeop_desc ${name}_desc = {\n";
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# offset
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print CFILE "\t0,\n";
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# printable name
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printf CFILE "\t\"%s\",\n", $name;
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# flags
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$vppwillrele = '';
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for ($i = 0; $i < $numargs; $i++) {
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if ($types{$i} eq 'struct vnode **' &&
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($reles{$i} eq 'WILLRELE')) {
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$vppwillrele = '|VDESC_VPP_WILLRELE';
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}
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}
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if ($releflags eq '') {
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printf CFILE "\t0%s,\n", $vppwillrele;
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}
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else {
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printf CFILE "\t%s%s,\n", $releflags, $vppwillrele;
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}
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# vp offsets
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printf CFILE "\t%s_vp_offsets,\n", $name;
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# vpp (if any)
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printf CFILE "\t%s,\n", &find_arg_with_type('struct vnode **');
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# cred (if any)
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printf CFILE "\t%s,\n", &find_arg_with_type('struct ucred *');
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# proc (if any)
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printf CFILE "\t%s,\n", &find_arg_with_type('struct proc *');
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# componentname
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printf CFILE "\t%s,\n", &find_arg_with_type('struct componentname *');
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# transport layer information
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print CFILE "\tNULL,\n};\n\n";
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}
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close(HEADER) || die "Unable to close $HEADER";
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close(CFILE) || die "Unable to close $CFILE";
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close(SRC) || die;
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exit 0;
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sub find_arg_with_type {
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my $type = shift;
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my $i;
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for ($i=0; $i < $numargs; $i++) {
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if ($types{$i} eq $type) {
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return "VOPARG_OFFSETOF(struct ${name}_args,a_" . $args{$i} . ")";
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}
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}
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return "VDESC_NO_OFFSET";
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}
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