gems-kernel/source/THIRDPARTY/xnu/bsd/vfs/vnode_if.sh
2024-06-03 11:29:39 -05:00

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#!/bin/sh -
copyright='
/*
* Copyright (c) 2000-2019 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* The contents of this file constitute Original Code as defined in and
* are subject to the Apple Public Source License Version 1.1 (the
* "License"). You may not use this file except in compliance with the
* License. Please obtain a copy of the License at
* http://www.apple.com/publicsource and read it before using this file.
*
* This Original Code and all software distributed under the License are
* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
* License for the specific language governing rights and limitations
* under the License.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved
* Copyright (c) 1992, 1993, 1994, 1995
* 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.
*/
'
SCRIPT_ID='@(#)vnode_if.sh 8.7 (Berkeley) 5/11/95'
# Script to produce VFS front-end sugar.
#
# usage: vnode_if.sh srcfile
# (where srcfile is currently bsd/vfs/vnode_if.src)
#
if [ $# -ne 1 ] ; then
echo 'usage: vnode_if.sh srcfile'
exit 1
fi
# Name of the source file.
src=$1
# Names of the created files.
out_c=vnode_if.c
out_h=vnode_if.h
# Awk program (must support nawk extensions)
# Use "awk" at Berkeley, "nawk" or "gawk" elsewhere.
awk=${AWK:-awk}
#awk=${AWK:-gawk}
# Does this awk have a "toupper" function? (i.e. is it GNU awk)
isgawk=`$awk 'BEGIN { print toupper("true"); exit; }' 2>/dev/null`
# If this awk does not define "toupper" then define our own.
if [ "$isgawk" = TRUE ] ; then
# GNU awk provides it.
toupper=
else
# Provide our own toupper()
toupper='
function toupper(str) {
_toupper_cmd = "echo "str" |tr a-z A-Z"
_toupper_cmd | getline _toupper_str;
close(_toupper_cmd);
return _toupper_str;
}'
fi
#
# This is the common part of all awk programs that read $src
# This parses the input for one function into the arrays:
# argdir, argtype, argname, willrele
# and calls "doit()" to generate output for the function.
#
# Input to this parser is pre-processed slightly by sed
# so this awk parser doesn't have to work so hard. The
# changes done by the sed pre-processing step are:
# insert a space beween * and pointer name
# replace semicolons with spaces
#
sed_prep='s:\*\([^\*/]\):\* \1:g
s/;/ /'
awk_parser='
# Comment line
/^#/ { next; }
# First line of description
/^vop_/ {
name=$1;
argc=0;
ubc=$3;
next;
}
# Last line of description
/^}/ {
doit();
next;
}
# Middle lines of description
{
argdir[argc] = $1; i=2;
if ($2 == "WILLRELE") {
willrele[argc] = 1;
i++;
} else
willrele[argc] = 0;
argtype[argc] = $i; i++;
while (i < NF) {
argtype[argc] = argtype[argc]" "$i;
i++;
}
argname[argc] = $i;
argc++;
next;
}
'
# This is put after the copyright on each generated file.
warning="
/*
* Warning: This file is generated automatically.
* (Modifications made here may easily be lost!)
*
* Created by the script:
* ${SCRIPT_ID}
*/
"
# Get rid of ugly spaces
space_elim='s:\([^/]\*\) :\1:g'
#
# Redirect stdout to the H file.
#
echo "$0: Creating $out_h" 1>&2
exec > $out_h
# Begin stuff
echo "$copyright"
echo "$warning"
echo '
#ifndef _SYS_VNODE_IF_H_
#define _SYS_VNODE_IF_H_
#include <sys/appleapiopts.h>
#include <sys/ubc.h>
#ifdef __APPLE_API_UNSTABLE
extern struct vnodeop_desc vop_default_desc;
'
# Body stuff
# This awk program needs toupper() so define it if necessary.
sed -e "$sed_prep" $src | $awk "$toupper"'
function doit() {
# Declare arg struct, descriptor.
printf("\nstruct %s_args {\n", name);
printf("\tstruct vnodeop_desc * a_desc;\n");
for (i=0; i<argc; i++) {
printf("\t%s a_%s;\n", argtype[i], argname[i]);
}
printf("};\n");
printf("extern struct vnodeop_desc %s_desc;\n", name);
# Define inline function.
printf("#define %s(", toupper(name));
for (i=0; i<argc; i++) {
printf("%s", argname[i]);
if (i < (argc-1)) printf(", ");
}
printf(") _%s(", toupper(name));
for (i=0; i<argc; i++) {
printf("%s", argname[i]);
if (i < (argc-1)) printf(", ");
}
printf(")\n");
printf("static __inline int _%s(", toupper(name));
for (i=0; i<argc; i++) {
# generate ANSI protoypes now, hurrah!
printf("%s _%s", argtype[i], argname[i]);
if (i < (argc-1)) printf(", ");
}
printf(")\n");
printf("{\n\tstruct %s_args a;\n", name);
printf("\ta.a_desc = VDESC(%s);\n", name);
for (i=0; i<argc; i++) {
printf("\ta.a_%s = _%s;\n", argname[i], argname[i]);
}
if (toupper(ubc) == "UBC") {
printf("\t{\n\t\t" \
"int _err;\n\t\t" \
"_err = VCALL(_%s%s, VOFFSET(%s), &a);\n\t\t" \
"return (_err);\n\t}\n}\n",
argname[0], argname[0], arg0special, name, argname[0]);
} else {
printf("\treturn (VCALL(_%s%s, VOFFSET(%s), &a));\n}\n",
argname[0], arg0special, name);
}
}
BEGIN {
arg0special="";
}
END {
printf("\n/* Special cases: */\n#include <sys/buf.h>\n#include <sys/vm.h>\n");
argc=1;
argtype[0]="struct buf *";
argname[0]="bp";
arg0special="->b_vp";
name="vop_strategy";
doit();
name="VNOP_BWRITE";
doit();
}
'"$awk_parser" | sed -e "$space_elim"
# End stuff
echo '
/* End of special cases. */
#endif /* __APPLE_API_UNSTABLE */
#endif /* !_SYS_VNODE_IF_H_ */'
#
# Redirect stdout to the C file.
#
echo "$0: Creating $out_c" 1>&2
exec > $out_c
# Begin stuff
echo "$copyright"
echo "$warning"
echo '
#include <sys/param.h>
#include <sys/mount.h>
#include <sys/vm.h>
#include <sys/vnode.h>
struct vnodeop_desc vop_default_desc = {
.vdesc_offset = 0,
.vdesc_name = "default",
.vdesc_flags = 0,
.vdesc_vp_offsets = NULL,
.vdesc_vpp_offset = VDESC_NO_OFFSET,
.vdesc_cred_offset = VDESC_NO_OFFSET,
.vdesc_proc_offset = VDESC_NO_OFFSET,
.vdesc_componentname_offset = VDESC_NO_OFFSET,
.vdesc_context_offset = VDESC_NO_OFFSET,
.vdesc_transports = NULL,
};
'
# Body stuff
sed -e "$sed_prep" $src | $awk '
function do_offset(typematch) {
for (i=0; i<argc; i++) {
if (argtype[i] == typematch) {
printf("\tVOPARG_OFFSETOF(struct %s_args, a_%s),\n",
name, argname[i]);
return i;
};
};
print "\tVDESC_NO_OFFSET,";
return -1;
}
function doit() {
# Define offsets array
printf("\nint %s_vp_offsets[] = {\n", name);
for (i=0; i<argc; i++) {
if (argtype[i] == "struct vnode *") {
printf ("\tVOPARG_OFFSETOF(struct %s_args,a_%s),\n",
name, argname[i]);
}
}
print "\tVDESC_NO_OFFSET";
print "};";
# Define F_desc
printf("struct vnodeop_desc %s_desc = {\n", name);
# offset
printf ("\t0,\n");
# printable name
printf ("\t\"%s\",\n", name);
# flags
printf("\t0");
vpnum = 0;
for (i=0; i<argc; i++) {
if (match(argtype[i], "struct vnode *") == 1) {
if (willrele[i]) {
if (argdir[i] ~ /OUT/) {
printf(" | VDESC_VPP_WILLRELE");
} else {
printf(" | VDESC_VP%s_WILLRELE", vpnum);
};
}
vpnum++;
}
}
print ",";
# vp offsets
printf ("\t%s_vp_offsets,\n", name);
# vpp (if any)
do_offset("struct vnode **");
# cred (if any)
do_offset("kauth_credential_t");
# proc (if any)
do_offset("struct proc *");
# componentname
do_offset("struct componentname *");
# transport layer information
printf ("\tNULL,\n};\n");
}
END {
printf("\n/* Special cases: */\n");
argc=1;
argdir[0]="IN";
argtype[0]="struct buf *";
argname[0]="bp";
willrele[0]=0;
name="vop_strategy";
doit();
name="VNOP_BWRITE";
doit();
}
'"$awk_parser" | sed -e "$space_elim"
# End stuff
echo '
/* End of special cases. */'
# Add the vfs_op_descs array to the C file.
# Begin stuff
echo '
struct vnodeop_desc *vfs_op_descs[] = {
&vop_default_desc, /* MUST BE FIRST */
&vop_strategy_desc, /* XXX: SPECIAL CASE */
&VNOP_BWRITE_desc, /* XXX: SPECIAL CASE */
'
# Body stuff
sed -e "$sed_prep" $src | $awk '
function doit() {
printf("\t&%s_desc,\n", name);
}
'"$awk_parser"
# End stuff
echo ' NULL
};
'
exit 0
# Local Variables:
# tab-width: 4
# End: