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freebsd/sys/tools/vnode_if.awk
David E. O'Brien fda3199fb9 Return vnode_if back to its AWK roots.
It became a Perl script in rev 1.20.  This removes one more dependence
on perl for the kernel build.
2002-03-01 01:20:23 +00:00

300 lines
7.8 KiB
Awk

#!/usr/bin/awk -f
#
# Copyright (c) 1992, 1993
# The Regents of the University of California. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# 3. All advertising materials mentioning features or use of this software
# must display the following acknowledgement:
# This product includes software developed by the University of
# California, Berkeley and its contributors.
# 4. Neither the name of the University nor the names of its contributors
# may be used to endorse or promote products derived from this software
# without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
# @(#)vnode_if.sh 8.1 (Berkeley) 6/10/93
# $FreeBSD$
#
# Script to produce VFS front-end sugar.
#
# usage: vnode_if.awk <srcfile> [-c | -h]
# (where <srcfile> is currently /sys/kern/vnode_if.src)
#
function usage()
{
print "usage: vnode_if.awk <srcfile> [-c|-h]";
exit 1;
}
function die(msg, what)
{
printf msg "\n", what > "/dev/stderr";
exit 1;
}
function t_spc(type)
{
# Append a space if the type is not a pointer
return (type ~ /\*$/) ? type : type " ";
}
# These are just for convenience ...
function printc(s) {print s > cfile;}
function printh(s) {print s > hfile;}
function add_debug_code(name, arg)
{
if (debug_all_vfs_locks && lockdata[name, arg, "Entry"]) {
# Add assertions for locking
if (lockdata[name, arg, "Entry"] == "L")
printh("\tASSERT_VOP_LOCKED("arg", \""uname"\");");
else if (lockdata[name, arg, "Entry"] == "U")
printh("\tASSERT_VOP_UNLOCKED("arg", \""uname"\");");
else if (0) {
# XXX More checks!
}
}
}
function find_arg_with_type (type)
{
for (jj = 0; jj < numargs; jj++) {
if (types[jj] == type) {
return "VOPARG_OFFSETOF(struct " \
name "_args,a_" args[jj] ")";
}
}
return "VDESC_NO_OFFSET";
}
BEGIN{
# Process the command line
for (i = 1; i < ARGC; i++) {
arg = ARGV[i];
if (arg !~ /^-[ch]+$/ && arg !~ /\.src$/)
usage();
if (arg ~ /^-.*c/)
cfile = "vnode_if.c";
if (arg ~ /^-.*h/)
hfile = "vnode_if.h";
if (arg ~ /\.src$/)
srcfile = arg;
}
ARGC = 1;
if (!cfile && !hfile)
exit 0;
if (!srcfile)
usage();
debug_all_vfs_locks = (ENVIRON["DEBUG_ALL_VFS_LOCKS"] ~ /[Yy][Ee][Ss]/);
common_head = \
"/*\n" \
" * This file is produced automatically.\n" \
" * Do not modify anything in here by hand.\n" \
" *\n" \
" * Created from $FreeBSD$\n" \
" */\n" \
"\n";
if (hfile)
printh(common_head "extern struct vnodeop_desc vop_default_desc;");
if (cfile) {
printc(common_head \
"#include <sys/param.h>\n" \
"#include <sys/vnode.h>\n" \
"\n" \
"struct vnodeop_desc vop_default_desc = {\n" \
" 1,\t\t\t/* special case, vop_default => 1 */\n" \
" \"default\",\n" \
" 0,\n" \
" NULL,\n" \
" VDESC_NO_OFFSET,\n" \
" VDESC_NO_OFFSET,\n" \
" VDESC_NO_OFFSET,\n" \
" VDESC_NO_OFFSET,\n" \
" NULL,\n" \
"};\n");
}
while ((getline < srcfile) > 0) {
if (NF == 0)
continue;
if ($1 ~ /^#/) {
if (NF != 6 || $1 != "#%" || \
$2 !~ /^[a-z]+$/ || $3 !~ /^[a-z]+$/ || \
$4 !~ /^.$/ || $5 !~ /^.$/ || $6 !~ /^.$/)
continue;
lockdata["vop_" $2, $3, "Entry"] = $4;
lockdata["vop_" $2, $3, "OK"] = $5;
lockdata["vop_" $2, $3, "Error"] = $6;
continue;
}
# Get the function name.
name = $1;
uname = toupper(name);
# Get the function arguments.
for (numargs = 0; ; ++numargs) {
if ((getline < srcfile) <= 0) {
die("Unable to read through the arguments for \"%s\"",
name);
}
if ($1 ~ /^\};/)
break;
# Delete comments, if any.
gsub (/\/\*.*\*\//, "");
# Condense whitespace and delete leading/trailing space.
gsub(/[[:space:]]+/, " ");
sub(/^ /, "");
sub(/ $/, "");
# Pick off direction.
if ($1 != "INOUT" && $1 != "IN" && $1 != "OUT")
die("No IN/OUT direction for \"%s\".", $0);
dirs[numargs] = $1;
sub(/^[A-Z]* /, "");
if ((reles[numargs] = $1) == "WILLRELE")
sub(/^[A-Z]* /, "");
else
reles[numargs] = "WONTRELE";
# kill trailing ;
if (sub(/;$/, "") < 1)
die("Missing end-of-line ; in \"%s\".", $0);
# pick off variable name
if ((argp = match($0, /[A-Za-z0-9_]+$/)) < 1)
die("Missing var name \"a_foo\" in \"%s\".", $0);
args[numargs] = substr($0, argp);
$0 = substr($0, 1, argp - 1);
# what is left must be type
# remove trailing space (if any)
sub(/ $/, "");
types[numargs] = $0;
}
if (hfile) {
# Print out the vop_F_args structure.
printh("struct "name"_args {\n\tstruct vnodeop_desc *a_desc;");
for (i = 0; i < numargs; ++i)
printh("\t" t_spc(types[i]) "a_" args[i] ";");
printh("};");
# Print out extern declaration.
printh("extern struct vnodeop_desc " name "_desc;");
# Print out function.
printh("static __inline int " uname "(");
for (i = 0; i < numargs; ++i) {
printh("\t" t_spc(types[i]) args[i] \
(i < numargs - 1 ? "," : ")"));
}
printh("{\n\tstruct " name "_args a;");
printh("\tint rc;");
printh("\ta.a_desc = VDESC(" name ");");
for (i = 0; i < numargs; ++i)
printh("\ta.a_" args[i] " = " args[i] ";");
for (i = 0; i < numargs; ++i)
add_debug_code(name, args[i]);
printh("\trc = VCALL(" args[0] ", VOFFSET(" name "), &a);");
printh("\treturn (rc);\n}");
}
if (cfile) {
# Print out the vop_F_vp_offsets structure. This all depends
# on naming conventions and nothing else.
printc("static int " name "_vp_offsets[] = {");
# as a side effect, figure out the releflags
releflags = "";
vpnum = 0;
for (i = 0; i < numargs; i++) {
if (types[i] == "struct vnode *") {
printc("\tVOPARG_OFFSETOF(struct " name \
"_args,a_" args[i] "),");
if (reles[i] == "WILLRELE") {
releflags = releflags \
"|VDESC_VP" vpnum "_WILLRELE";
}
vpnum++;
}
}
sub(/^\|/, "", releflags);
printc("\tVDESC_NO_OFFSET");
printc("};");
# Print out the vnodeop_desc structure.
printc("struct vnodeop_desc " name "_desc = {");
# offset
printc("\t0,");
# printable name
printc("\t\"" name "\",");
# flags
vppwillrele = "";
for (i = 0; i < numargs; i++) {
if (types[i] == "struct vnode **" && \
reles[i] == "WILLRELE") {
vppwillrele = "|VDESC_VPP_WILLRELE";
}
}
if (!releflags)
releflags = "0";
printc("\t" releflags vppwillrele ",");
# vp offsets
printc("\t" name "_vp_offsets,");
# vpp (if any)
printc("\t" find_arg_with_type("struct vnode **") ",");
# cred (if any)
printc("\t" find_arg_with_type("struct ucred *") ",");
# thread (if any)
printc("\t" find_arg_with_type("struct thread *") ",");
# componentname
printc("\t" find_arg_with_type("struct componentname *") ",");
# transport layer information
printc("\tNULL,\n};\n");
}
}
if (hfile)
close(hfile);
if (cfile)
close(cfile);
close(srcfile);
exit 0;
}