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| Current File : //sys/amd64/compile/hs32/modules/usr/src/sys/modules/mvs/@/amd64/compile/hs32/modules/usr/src/sys/modules/amr/@/tools/vnode_if.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.
# 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: release/9.1.0/sys/tools/vnode_if.awk 233804 2012-04-02 19:06:28Z trociny $
#
# Script to produce VFS front-end sugar.
#
# usage: vnode_if.awk <srcfile> [-c | -h | -p | -q]
# (where <srcfile> is currently /sys/kern/vnode_if.src)
# The source file must have a .src extension
#
function usage()
{
print "usage: vnode_if.awk <srcfile> [-c|-h|-p|-q]";
exit 1;
}
function die(msg, what)
{
printf srcfile "(" fnr "): " > "/dev/stderr";
printf msg "\n", what > "/dev/stderr";
exit 1;
}
function t_spc(type)
{
# Append a space if the type is not a pointer
return (type ~ /\*$/) ? type : type " ";
}
# These are just for convenience ...
function printc(s) {print s > cfile;}
function printh(s) {print s > hfile;}
function printp(s) {print s > pfile;}
function printq(s) {print s > qfile;}
function add_debug_code(name, arg, pos, ind)
{
if (arg == "vpp")
star = "*";
else
star = "";
if (lockdata[name, arg, pos] && (lockdata[name, arg, pos] != "-")) {
printc(ind"ASSERT_VI_UNLOCKED("star"a->a_"arg", \""uname"\");");
# Add assertions for locking
if (lockdata[name, arg, pos] == "L")
printc(ind"ASSERT_VOP_LOCKED(" star "a->a_"arg", \""uname"\");");
else if (lockdata[name, arg, pos] == "U")
printc(ind"ASSERT_VOP_UNLOCKED(" star "a->a_"arg", \""uname"\");");
else if (lockdata[name, arg, pos] == "E")
printc(ind"ASSERT_VOP_ELOCKED(" star "a->a_"arg", \""uname"\");");
else if (0) {
# XXX More checks!
}
}
}
function add_pre(name)
{
if (lockdata[name, "pre"]) {
printc("\t"lockdata[name, "pre"]"(a);");
}
}
function add_post(name)
{
if (lockdata[name, "post"]) {
printc("\t"lockdata[name, "post"]"(a, rc);");
}
}
function find_arg_with_type (type)
{
for (jj = 0; jj < numargs; jj++) {
if (types[jj] == type) {
return "VOPARG_OFFSETOF(struct " \
name "_args,a_" args[jj] ")";
}
}
return "VDESC_NO_OFFSET";
}
BEGIN{
# Process the command line
for (i = 1; i < ARGC; i++) {
arg = ARGV[i];
if (arg !~ /^-[chpq]+$/ && arg !~ /\.src$/)
usage();
if (arg ~ /^-.*c/)
cfile = "vnode_if.c";
if (arg ~ /^-.*h/)
hfile = "vnode_if.h";
if (arg ~ /^-.*p/)
pfile = "vnode_if_newproto.h";
if (arg ~ /^-.*q/)
qfile = "vnode_if_typedef.h";
if (arg ~ /\.src$/)
srcfile = arg;
}
ARGC = 1;
if (!cfile && !hfile && !pfile && !qfile)
exit 0;
if (!srcfile)
usage();
common_head = \
"/*\n" \
" * This file is produced automatically.\n" \
" * Do not modify anything in here by hand.\n" \
" *\n" \
" * Created from $FreeBSD: release/9.1.0/sys/tools/vnode_if.awk 233804 2012-04-02 19:06:28Z trociny $\n" \
" */\n" \
"\n";
if (pfile) {
printp(common_head)
printp("struct vop_vector {")
printp("\tstruct vop_vector\t*vop_default;")
printp("\tvop_bypass_t\t*vop_bypass;")
}
if (qfile) {
printq(common_head)
}
if (hfile) {
printh(common_head "extern struct vnodeop_desc vop_default_desc;");
printh("#include \"vnode_if_typedef.h\"")
printh("#include \"vnode_if_newproto.h\"")
}
if (cfile) {
printc(common_head \
"#include \"opt_kdtrace.h\"\n" \
"\n" \
"#include <sys/param.h>\n" \
"#include <sys/event.h>\n" \
"#include <sys/kernel.h>\n" \
"#include <sys/mount.h>\n" \
"#include <sys/sdt.h>\n" \
"#include <sys/systm.h>\n" \
"#include <sys/vnode.h>\n" \
"\n" \
"SDT_PROVIDER_DECLARE(vfs);\n" \
"\n" \
"struct vnodeop_desc vop_default_desc = {\n" \
" \"default\",\n" \
" 0,\n" \
" (vop_bypass_t *)vop_panic,\n" \
" NULL,\n" \
" VDESC_NO_OFFSET,\n" \
" VDESC_NO_OFFSET,\n" \
" VDESC_NO_OFFSET,\n" \
" VDESC_NO_OFFSET,\n" \
"};\n");
}
while ((getline < srcfile) > 0) {
fnr++;
if (NF == 0)
continue;
if ($1 ~ /^%%/) {
if (NF != 6 ||
$2 !~ /^[a-z_]+$/ || $3 !~ /^[a-z]+$/ ||
$4 !~ /^.$/ || $5 !~ /^.$/ || $6 !~ /^.$/) {
die("Invalid %s construction", "%%");
continue;
}
lockdata["vop_" $2, $3, "Entry"] = $4;
lockdata["vop_" $2, $3, "OK"] = $5;
lockdata["vop_" $2, $3, "Error"] = $6;
continue;
}
if ($1 ~ /^%!/) {
if (NF != 4 ||
($3 != "pre" && $3 != "post")) {
die("Invalid %s construction", "%!");
continue;
}
lockdata["vop_" $2, $3] = $4;
continue;
}
if ($1 ~ /^#/)
continue;
# Get the function name.
name = $1;
uname = toupper(name);
# Start constructing a ktrpoint string
ctrstr = "\"" uname;
# Get the function arguments.
for (numargs = 0; ; ++numargs) {
if ((getline < srcfile) <= 0) {
die("Unable to read through the arguments for \"%s\"",
name);
}
fnr++;
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;
# We can do a maximum of 6 arguments to CTR*
if (numargs <= 6) {
if (numargs == 0)
ctrstr = ctrstr "(" args[numargs];
else
ctrstr = ctrstr ", " args[numargs];
if (types[numargs] ~ /\*/)
ctrstr = ctrstr " 0x%lX";
else
ctrstr = ctrstr " %ld";
}
}
if (numargs > 6)
ctrargs = 6;
else
ctrargs = numargs;
ctrstr = "\tCTR" ctrargs "(KTR_VOP,\n\t " ctrstr ")\",\n\t ";
ctrstr = ctrstr "a->a_" args[0];
for (i = 1; i < ctrargs; ++i)
ctrstr = ctrstr ", a->a_" args[i];
ctrstr = ctrstr ");";
if (pfile) {
printp("\t"name"_t\t*"name";")
}
if (qfile) {
printq("struct "name"_args;")
printq("typedef int "name"_t(struct "name"_args *);\n")
}
if (hfile) {
# Print out the vop_F_args structure.
printh("struct "name"_args {\n\tstruct vop_generic_args a_gen;");
for (i = 0; i < numargs; ++i)
printh("\t" t_spc(types[i]) "a_" args[i] ";");
printh("};");
printh("");
# Print out extern declaration.
printh("extern struct vnodeop_desc " name "_desc;");
printh("");
# Print out function prototypes.
printh("int " uname "_AP(struct " name "_args *);");
printh("int " uname "_APV(struct vop_vector *vop, struct " name "_args *);");
printh("");
printh("static __inline int " uname "(");
for (i = 0; i < numargs; ++i) {
printh("\t" t_spc(types[i]) args[i] \
(i < numargs - 1 ? "," : ")"));
}
printh("{");
printh("\tstruct " name "_args a;");
printh("");
printh("\ta.a_gen.a_desc = &" name "_desc;");
for (i = 0; i < numargs; ++i)
printh("\ta.a_" args[i] " = " args[i] ";");
printh("\treturn (" uname "_APV("args[0]"->v_op, &a));");
printh("}");
printh("");
}
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("};");
printc("\n");
printc("SDT_PROBE_DEFINE2(vfs, vop, " name ", entry, entry, \"struct vnode *\", \"struct " name "_args *\");\n");
printc("SDT_PROBE_DEFINE3(vfs, vop, " name ", return, return, \"struct vnode *\", \"struct " name "_args *\", \"int\");\n");
# Print out function.
printc("\nint\n" uname "_AP(struct " name "_args *a)");
printc("{");
printc("");
printc("\treturn(" uname "_APV(a->a_" args[0] "->v_op, a));");
printc("}");
printc("\nint\n" uname "_APV(struct vop_vector *vop, struct " name "_args *a)");
printc("{");
printc("\tint rc;");
printc("");
printc("\tVNASSERT(a->a_gen.a_desc == &" name "_desc, a->a_" args[0]",");
printc("\t (\"Wrong a_desc in " name "(%p, %p)\", a->a_" args[0]", a));");
printc("\twhile(vop != NULL && \\");
printc("\t vop->"name" == NULL && vop->vop_bypass == NULL)")
printc("\t\tvop = vop->vop_default;")
printc("\tVNASSERT(vop != NULL, a->a_" args[0]", (\"No "name"(%p, %p)\", a->a_" args[0]", a));")
printc("\tSDT_PROBE(vfs, vop, " name ", entry, a->a_" args[0] ", a, 0, 0, 0);\n");
for (i = 0; i < numargs; ++i)
add_debug_code(name, args[i], "Entry", "\t");
add_pre(name);
printc("\tif (vop->"name" != NULL)")
printc("\t\trc = vop->"name"(a);")
printc("\telse")
printc("\t\trc = vop->vop_bypass(&a->a_gen);")
printc(ctrstr);
printc("\tSDT_PROBE(vfs, vop, " name ", return, a->a_" args[0] ", a, rc, 0, 0);\n");
printc("\tif (rc == 0) {");
for (i = 0; i < numargs; ++i)
add_debug_code(name, args[i], "OK", "\t\t");
printc("\t} else {");
for (i = 0; i < numargs; ++i)
add_debug_code(name, args[i], "Error", "\t\t");
printc("\t}");
add_post(name);
printc("\treturn (rc);");
printc("}\n");
# Print out the vnodeop_desc structure.
printc("struct vnodeop_desc " name "_desc = {");
# 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 ",");
# function to call
printc("\t(vop_bypass_t *)" uname "_AP,");
# 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("};\n");
}
}
if (pfile)
printp("};")
if (hfile)
close(hfile);
if (cfile)
close(cfile);
if (pfile)
close(pfile);
close(srcfile);
exit 0;
}