808a36ef65
This will make a number of things easier in the future, as well as (finally!) avoiding the Id-smashing problem which has plagued developers for so long. Boy, I'm glad we're not using sup anymore. This update would have been insane otherwise.
460 lines
11 KiB
Bash
460 lines
11 KiB
Bash
#!/bin/sh -
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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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# These awk scripts are not particularly well written, specifically they
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# don't use arrays well and figure out the same information repeatedly.
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# Please rewrite them if you actually understand how to use awk. Note,
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# they use nawk extensions and gawk's toupper.
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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 of the source file.
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SRC=$1
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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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# Awk program (must support nawk extensions and gawk's "toupper")
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# Use "awk" at Berkeley, "gawk" elsewhere.
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AWK=awk
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# Print out header information for vnode_if.h.
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cat << END_OF_LEADING_COMMENT > $HEADER
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/*
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* This file is produced automatically.
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* Do not modify anything in here by hand.
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*
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* Created from @(#)vnode_if.sh 8.1 (Berkeley) 6/10/93
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*/
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extern struct vnodeop_desc vop_default_desc;
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END_OF_LEADING_COMMENT
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# Awk script to take vnode_if.src and turn it into vnode_if.h.
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$AWK '
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NF == 0 || $0 ~ "^#" {
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next;
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}
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{
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# Get the function name.
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name = $1;
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uname = toupper(name);
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# Get the function arguments.
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for (c1 = 0;; ++c1) {
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if (getline <= 0)
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exit
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if ($0 ~ "^};")
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break;
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a[c1] = $0;
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}
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# Print out the vop_F_args structure.
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printf("struct %s_args {\n\tstruct vnodeop_desc *a_desc;\n",
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name);
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for (c2 = 0; c2 < c1; ++c2) {
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c3 = split(a[c2], t);
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printf("\t");
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if (t[2] ~ "WILLRELE")
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c4 = 3;
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else
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c4 = 2;
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for (; c4 < c3; ++c4)
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printf("%s ", t[c4]);
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beg = match(t[c3], "[^*]");
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printf("%sa_%s\n",
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substr(t[c4], 0, beg - 1), substr(t[c4], beg));
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}
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printf("};\n");
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# Print out extern declaration.
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printf("extern struct vnodeop_desc %s_desc;\n", name);
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# Print out prototype.
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printf("static int %s __P((\n", uname);
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sep = ",\n";
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for (c2 = 0; c2 < c1; ++c2) {
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if (c2 == c1 - 1)
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sep = "));\n";
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c3 = split(a[c2], t);
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printf("\t");
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if (t[2] ~ "WILLRELE")
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c4 = 3;
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else
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c4 = 2;
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for (; c4 < c3; ++c4)
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printf("%s ", t[c4]);
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beg = match(t[c3], "[^*]");
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end = match(t[c3], ";");
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printf("%s%s%s",
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substr(t[c4], 0, beg - 1),
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substr(t[c4], beg, end - beg), sep);
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}
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# Print out inline struct.
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printf("static inline int %s(", uname);
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sep = ", ";
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for (c2 = 0; c2 < c1; ++c2) {
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if (c2 == c1 - 1)
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sep = ")\n";
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c3 = split(a[c2], t);
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beg = match(t[c3], "[^*]");
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end = match(t[c3], ";");
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printf("%s%s", substr(t[c3], beg, end - beg), sep);
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}
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for (c2 = 0; c2 < c1; ++c2) {
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c3 = split(a[c2], t);
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printf("\t");
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if (t[2] ~ "WILLRELE")
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c4 = 3;
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else
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c4 = 2;
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for (; c4 < c3; ++c4)
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printf("%s ", t[c4]);
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beg = match(t[c3], "[^*]");
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printf("%s%s\n",
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substr(t[c4], 0, beg - 1), substr(t[c4], beg));
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}
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printf("{\n\tstruct %s_args a;\n\n", name);
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printf("\ta.a_desc = VDESC(%s);\n", name);
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for (c2 = 0; c2 < c1; ++c2) {
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c3 = split(a[c2], t);
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printf("\t");
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beg = match(t[c3], "[^*]");
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end = match(t[c3], ";");
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printf("a.a_%s = %s\n",
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substr(t[c3], beg, end - beg), substr(t[c3], beg));
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}
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c1 = split(a[0], t);
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beg = match(t[c1], "[^*]");
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end = match(t[c1], ";");
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printf("\treturn (VCALL(%s, VOFFSET(%s), &a));\n}\n",
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substr(t[c1], beg, end - beg), name);
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}' < $SRC >> $HEADER
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# Print out header information for vnode_if.c.
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cat << END_OF_LEADING_COMMENT > $CFILE
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/*
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* This file is produced automatically.
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* Do not modify anything in here by hand.
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*
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* Created from @(#)vnode_if.sh 8.1 (Berkeley) 6/10/93
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*/
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#include <sys/param.h>
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#include <sys/mount.h>
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#include <sys/vnode.h>
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struct vnodeop_desc vop_default_desc = {
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0,
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"default",
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0,
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NULL,
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VDESC_NO_OFFSET,
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VDESC_NO_OFFSET,
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VDESC_NO_OFFSET,
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VDESC_NO_OFFSET,
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NULL,
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};
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END_OF_LEADING_COMMENT
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# Awk script to take vnode_if.src and turn it into vnode_if.c.
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$AWK 'function kill_surrounding_ws (s) {
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sub (/^[ \t]*/, "", s);
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sub (/[ \t]*$/, "", s);
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return s;
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}
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function read_args() {
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numargs = 0;
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while (getline ln) {
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if (ln ~ /}/) {
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break;
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};
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# Delete comments, if any.
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gsub (/\/\*.*\*\//, "", ln);
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# Delete leading/trailing space.
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ln = kill_surrounding_ws(ln);
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# Pick off direction.
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if (1 == sub(/^INOUT[ \t]+/, "", ln))
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dir = "INOUT";
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else if (1 == sub(/^IN[ \t]+/, "", ln))
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dir = "IN";
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else if (1 == sub(/^OUT[ \t]+/, "", ln))
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dir = "OUT";
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else
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bail("No IN/OUT direction for \"" ln "\".");
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# check for "WILLRELE"
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if (1 == sub(/^WILLRELE[ \t]+/, "", ln)) {
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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 (1 != sub (/;$/, "", ln)) {
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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 (!(i = match(ln, /[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 = substr (ln, i);
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# Want to <<substr(ln, i) = "";>>, but nawk cannot.
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# Hack around this.
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ln = substr(ln, 1, i-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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gsub (/[ \t]+/, " ", type); # condense whitespace
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type = kill_surrounding_ws(type);
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# (boy this was easier in Perl)
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numargs++;
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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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}
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function generate_operation_vp_offsets() {
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printf ("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=1; i<=numargs; i++) {
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if (types[i] == "struct vnode *") {
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printf ("\tVOPARG_OFFSETOF(struct %s_args,a_%s),\n",
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name, args[i]);
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if (reles[i] == "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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sub (/^\|/, "", releflags);
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print "\tVDESC_NO_OFFSET";
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print "};";
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}
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function find_arg_with_type (type) {
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for (i=1; i<=numargs; i++) {
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if (types[i] == 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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function generate_operation_desc() {
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printf ("struct vnodeop_desc %s_desc = {\n", name);
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# offset
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printf ("\t0,\n");
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# printable name
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printf ("\t\"%s\",\n", name);
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# flags
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vppwillrele = "";
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for (i=1; i<=numargs; i++) {
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if (types[i] == "struct vnode **" &&
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(reles[i] == "WILLRELE")) {
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vppwillrele = "|VDESC_VPP_WILLRELE";
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};
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};
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if (releflags == "") {
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printf ("\t0%s,\n", vppwillrele);
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} else {
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printf ("\t%s%s,\n", releflags, vppwillrele);
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};
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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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printf ("\t%s,\n", find_arg_with_type("struct vnode **"));
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# cred (if any)
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printf ("\t%s,\n", find_arg_with_type("struct ucred *"));
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# proc (if any)
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printf ("\t%s,\n", find_arg_with_type("struct proc *"));
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# componentname
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printf ("\t%s,\n", find_arg_with_type("struct componentname *"));
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# transport layer information
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printf ("\tNULL,\n};\n");
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}
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NF == 0 || $0 ~ "^#" {
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next;
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}
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{
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# get the function name
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name = $1;
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# get the function arguments
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read_args();
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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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generate_operation_vp_offsets();
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# Print out the vnodeop_desc structure.
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generate_operation_desc();
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printf "\n";
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}' < $SRC >> $CFILE
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# THINGS THAT DON'T WORK RIGHT YET.
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#
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# Two existing BSD vnodeops (bwrite and strategy) don't take any vnodes as
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# arguments. This means that these operations can't function successfully
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# through a bypass routine.
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#
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# Bwrite and strategy will be replaced when the VM page/buffer cache
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# integration happens.
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#
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# To get around this problem for now we handle these ops as special cases.
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cat << END_OF_SPECIAL_CASES >> $HEADER
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#include <sys/buf.h>
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struct vop_strategy_args {
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struct vnodeop_desc *a_desc;
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struct buf *a_bp;
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};
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extern struct vnodeop_desc vop_strategy_desc;
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static int VOP_STRATEGY __P((
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struct buf *bp));
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static inline int VOP_STRATEGY(bp)
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struct buf *bp;
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{
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struct vop_strategy_args a;
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a.a_desc = VDESC(vop_strategy);
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a.a_bp = bp;
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return (VCALL((bp)->b_vp, VOFFSET(vop_strategy), &a));
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}
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struct vop_bwrite_args {
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struct vnodeop_desc *a_desc;
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struct buf *a_bp;
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};
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extern struct vnodeop_desc vop_bwrite_desc;
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static int VOP_BWRITE __P((
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struct buf *bp));
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static inline int VOP_BWRITE(bp)
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struct buf *bp;
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{
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struct vop_bwrite_args a;
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a.a_desc = VDESC(vop_bwrite);
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a.a_bp = bp;
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return (VCALL((bp)->b_vp, VOFFSET(vop_bwrite), &a));
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}
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END_OF_SPECIAL_CASES
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cat << END_OF_SPECIAL_CASES >> $CFILE
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static int vop_strategy_vp_offsets[] = {
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VDESC_NO_OFFSET
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};
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struct vnodeop_desc vop_strategy_desc = {
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0,
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"vop_strategy",
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0,
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vop_strategy_vp_offsets,
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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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static int vop_bwrite_vp_offsets[] = {
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VDESC_NO_OFFSET
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};
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struct vnodeop_desc vop_bwrite_desc = {
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0,
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"vop_bwrite",
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0,
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vop_bwrite_vp_offsets,
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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_SPECIAL_CASES
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# Add the vfs_op_descs array to the C file.
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$AWK '
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BEGIN {
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printf("\nstruct vnodeop_desc *vfs_op_descs[] = {\n");
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printf("\t&vop_default_desc, /* MUST BE FIRST */\n");
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printf("\t&vop_strategy_desc, /* XXX: SPECIAL CASE */\n");
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printf("\t&vop_bwrite_desc, /* XXX: SPECIAL CASE */\n");
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}
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END {
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printf("\tNULL\n};\n");
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}
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NF == 0 || $0 ~ "^#" {
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next;
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}
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{
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# Get the function name.
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printf("\t&%s_desc,\n", $1);
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# Skip the function arguments.
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for (;;) {
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if (getline <= 0)
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exit
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if ($0 ~ "^};")
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break;
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}
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}' < $SRC >> $CFILE
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