At the moment, hintmode and envmode are used to indicate whether static hints or static env have been provided in the kernel config(5) and the static versions are mutually exclusive with loader(8)-provided environment. hintmode *can* be reconfigured later to pull from the dynamic environment, thus taking advantage of the loader(8) or post-kmem environment setting. This changeset fixes both problems at once to move us from a semi-confusing state to a consistent state: if an environment file, hints file, or loader(8) environment are provided, we use them in a well-known order of precedence: - loader(8) environment - static environment - static hints file Once the dynamic environment is setup this becomes a moot point. The loader(8) and static environments are merged (respecting the above order of precedence), and the static hints are merged in on an as-needed basis after the dynamic environment has been setup. Hints lookup are changed to respect all of the above. Before the dynamic environment is setup, lookups use the above-mentioned order and fallback to the next environment if a matching hint is not found. Once the dynamic environment is setup, that is used on its own since it captures all of the above information plus any dynamic kenv settings that came up later in boot. The following tangentially related changes were made to res_find: - A hintp cookie is now passed in so that related searches continue using the chain of environments (or dynamic environment) without relying on global state - All three environments will be searched if they actually have valid hints to use, rather than just choosing the first environment that actually had a hint and rolling with that only The hintmode sysctl has been ripped out. static_{env,hints}.disabled are still honored and will disable their respective environments from being used for hint lookups and from being merged into the dynamic environment, as expected. MFC after: 1 month (maybe) Differential Revision: https://reviews.freebsd.org/D15953
483 lines
9.3 KiB
Plaintext
483 lines
9.3 KiB
Plaintext
%union {
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|
char *str;
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|
int val;
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|
struct file_list *file;
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|
}
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|
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|
%token ARCH
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|
%token COMMA
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|
%token CONFIG
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|
%token CPU
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|
%token NOCPU
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|
%token DEVICE
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|
%token NODEVICE
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|
%token ENV
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|
%token ENVVAR
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|
%token EQUALS
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|
%token PLUSEQUALS
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|
%token HINTS
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|
%token IDENT
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|
%token MAXUSERS
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|
%token PROFILE
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|
%token OPTIONS
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|
%token NOOPTION
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|
%token MAKEOPTIONS
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|
%token NOMAKEOPTION
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|
%token SEMICOLON
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|
%token INCLUDE
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|
%token FILES
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|
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|
%token <str> ENVLINE
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|
%token <str> ID
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|
%token <val> NUMBER
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|
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%type <str> Save_id
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%type <str> Opt_value
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%type <str> Dev
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%token <str> PATH
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%{
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|
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/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1988, 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. 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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* @(#)config.y 8.1 (Berkeley) 6/6/93
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* $FreeBSD$
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*/
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#include <assert.h>
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#include <ctype.h>
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#include <err.h>
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#include <stdio.h>
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#include <string.h>
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#include "config.h"
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struct device_head dtab;
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char *ident;
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char *env;
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int yyline;
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const char *yyfile;
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struct file_list_head ftab;
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struct files_name_head fntab;
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char errbuf[80];
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int maxusers;
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#define ns(s) strdup(s)
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int include(const char *, int);
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void yyerror(const char *s);
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int yywrap(void);
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static void newdev(char *name);
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static void newfile(char *name);
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static void newenvvar(char *name, bool is_file);
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static void rmdev_schedule(struct device_head *dh, char *name);
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static void newopt(struct opt_head *list, char *name, char *value, int append);
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static void rmopt_schedule(struct opt_head *list, char *name);
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static char *
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devopt(char *dev)
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{
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char *ret = malloc(strlen(dev) + 5);
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sprintf(ret, "DEV_%s", dev);
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raisestr(ret);
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return ret;
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}
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%}
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%%
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Configuration:
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Many_specs
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;
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Many_specs:
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Many_specs Spec
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/* lambda */
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;
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Spec:
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Device_spec SEMICOLON
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|
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Config_spec SEMICOLON
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|
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INCLUDE PATH SEMICOLON {
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if (incignore == 0)
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include($2, 0);
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};
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|
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INCLUDE ID SEMICOLON {
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if (incignore == 0)
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include($2, 0);
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};
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|
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FILES ID SEMICOLON { newfile($2); };
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SEMICOLON
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|
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error SEMICOLON
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;
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Config_spec:
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ARCH Save_id {
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if (machinename != NULL && !eq($2, machinename))
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errx(1, "%s:%d: only one machine directive is allowed",
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yyfile, yyline);
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machinename = $2;
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machinearch = $2;
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} |
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ARCH Save_id Save_id {
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if (machinename != NULL &&
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!(eq($2, machinename) && eq($3, machinearch)))
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errx(1, "%s:%d: only one machine directive is allowed",
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yyfile, yyline);
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machinename = $2;
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machinearch = $3;
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} |
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CPU Save_id {
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struct cputype *cp =
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(struct cputype *)calloc(1, sizeof (struct cputype));
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if (cp == NULL)
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err(EXIT_FAILURE, "calloc");
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cp->cpu_name = $2;
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SLIST_INSERT_HEAD(&cputype, cp, cpu_next);
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} |
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NOCPU Save_id {
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struct cputype *cp, *cp2;
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SLIST_FOREACH_SAFE(cp, &cputype, cpu_next, cp2) {
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if (eq(cp->cpu_name, $2)) {
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SLIST_REMOVE(&cputype, cp, cputype, cpu_next);
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free(cp);
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}
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}
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} |
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OPTIONS Opt_list
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NOOPTION NoOpt_list |
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MAKEOPTIONS Mkopt_list
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NOMAKEOPTION Save_id { rmopt_schedule(&mkopt, $2); } |
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IDENT ID { ident = $2; } |
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System_spec
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MAXUSERS NUMBER { maxusers = $2; } |
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PROFILE NUMBER { profiling = $2; } |
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ENV ID { newenvvar($2, true); } |
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ENVVAR ENVLINE { newenvvar($2, false); } |
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HINTS ID {
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struct hint *hint;
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hint = (struct hint *)calloc(1, sizeof (struct hint));
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if (hint == NULL)
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err(EXIT_FAILURE, "calloc");
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hint->hint_name = $2;
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STAILQ_INSERT_HEAD(&hints, hint, hint_next);
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}
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System_spec:
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CONFIG System_id System_parameter_list {
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errx(1, "%s:%d: root/dump/swap specifications obsolete",
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yyfile, yyline);
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}
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CONFIG System_id
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;
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System_id:
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Save_id { newopt(&mkopt, ns("KERNEL"), $1, 0); };
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System_parameter_list:
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System_parameter_list ID
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| ID
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;
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Opt_list:
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Opt_list COMMA Option
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Option
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;
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NoOpt_list:
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NoOpt_list COMMA NoOption
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NoOption
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;
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Option:
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Save_id {
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newopt(&opt, $1, NULL, 0);
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if (strchr($1, '=') != NULL)
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errx(1, "%s:%d: The `=' in options should not be "
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"quoted", yyfile, yyline);
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} |
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Save_id EQUALS Opt_value {
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newopt(&opt, $1, $3, 0);
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} ;
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NoOption:
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Save_id {
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rmopt_schedule(&opt, $1);
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};
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Opt_value:
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ID { $$ = $1; } |
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NUMBER {
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char buf[80];
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(void) snprintf(buf, sizeof(buf), "%d", $1);
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$$ = ns(buf);
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} ;
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Save_id:
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ID { $$ = $1; }
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;
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Mkopt_list:
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Mkopt_list COMMA Mkoption
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|
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Mkoption
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;
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Mkoption:
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Save_id { newopt(&mkopt, $1, ns(""), 0); } |
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Save_id EQUALS { newopt(&mkopt, $1, ns(""), 0); } |
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Save_id EQUALS Opt_value { newopt(&mkopt, $1, $3, 0); } |
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Save_id PLUSEQUALS Opt_value { newopt(&mkopt, $1, $3, 1); } ;
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Dev:
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ID { $$ = $1; }
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;
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Device_spec:
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DEVICE Dev_list
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NODEVICE NoDev_list
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;
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|
Dev_list:
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Dev_list COMMA Device
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|
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Device
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;
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NoDev_list:
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NoDev_list COMMA NoDevice
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|
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NoDevice
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;
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Device:
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Dev {
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newopt(&opt, devopt($1), ns("1"), 0);
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/* and the device part */
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newdev($1);
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}
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NoDevice:
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Dev {
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char *s = devopt($1);
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rmopt_schedule(&opt, s);
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free(s);
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/* and the device part */
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rmdev_schedule(&dtab, $1);
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} ;
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%%
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void
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yyerror(const char *s)
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{
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errx(1, "%s:%d: %s", yyfile, yyline + 1, s);
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}
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|
int
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yywrap(void)
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{
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|
if (found_defaults) {
|
|
if (freopen(PREFIX, "r", stdin) == NULL)
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err(2, "%s", PREFIX);
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|
yyfile = PREFIX;
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yyline = 0;
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found_defaults = 0;
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return 0;
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}
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return 1;
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}
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|
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/*
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* Add a new file to the list of files.
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*/
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static void
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newfile(char *name)
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{
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struct files_name *nl;
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nl = (struct files_name *) calloc(1, sizeof *nl);
|
|
if (nl == NULL)
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err(EXIT_FAILURE, "calloc");
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nl->f_name = name;
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STAILQ_INSERT_TAIL(&fntab, nl, f_next);
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}
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static void
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|
newenvvar(char *name, bool is_file)
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|
{
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|
struct envvar *envvar;
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|
envvar = (struct envvar *)calloc(1, sizeof (struct envvar));
|
|
if (envvar == NULL)
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|
err(EXIT_FAILURE, "calloc");
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envvar->env_str = name;
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envvar->env_is_file = is_file;
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STAILQ_INSERT_HEAD(&envvars, envvar, envvar_next);
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}
|
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|
|
/*
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|
* Find a device in the list of devices.
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*/
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|
static struct device *
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|
finddev(struct device_head *dlist, char *name)
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|
{
|
|
struct device *dp;
|
|
|
|
STAILQ_FOREACH(dp, dlist, d_next)
|
|
if (eq(dp->d_name, name))
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|
return (dp);
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|
|
return (NULL);
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|
}
|
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|
|
/*
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|
* Add a device to the list of devices.
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|
*/
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|
static void
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|
newdev(char *name)
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|
{
|
|
struct device *np;
|
|
|
|
if (finddev(&dtab, name)) {
|
|
fprintf(stderr,
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|
"WARNING: duplicate device `%s' encountered.\n", name);
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|
return;
|
|
}
|
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|
|
np = (struct device *) calloc(1, sizeof *np);
|
|
if (np == NULL)
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|
err(EXIT_FAILURE, "calloc");
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np->d_name = name;
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STAILQ_INSERT_TAIL(&dtab, np, d_next);
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}
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|
|
/*
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|
* Schedule a device to removal.
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*/
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|
static void
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|
rmdev_schedule(struct device_head *dh, char *name)
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|
{
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|
struct device *dp;
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|
|
dp = finddev(dh, name);
|
|
if (dp != NULL) {
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|
STAILQ_REMOVE(dh, dp, device, d_next);
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|
free(dp->d_name);
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|
free(dp);
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}
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}
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|
|
/*
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|
* Find an option in the list of options.
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*/
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static struct opt *
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|
findopt(struct opt_head *list, char *name)
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|
{
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|
struct opt *op;
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|
|
SLIST_FOREACH(op, list, op_next)
|
|
if (eq(op->op_name, name))
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|
return (op);
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|
|
return (NULL);
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|
}
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|
|
/*
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|
* Add an option to the list of options.
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|
*/
|
|
static void
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newopt(struct opt_head *list, char *name, char *value, int append)
|
|
{
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|
struct opt *op, *op2;
|
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|
|
/*
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|
* Ignore inclusions listed explicitly for configuration files.
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|
*/
|
|
if (eq(name, OPT_AUTOGEN)) {
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|
incignore = 1;
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return;
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|
}
|
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|
|
op2 = findopt(list, name);
|
|
if (op2 != NULL && !append) {
|
|
fprintf(stderr,
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|
"WARNING: duplicate option `%s' encountered.\n", name);
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|
return;
|
|
}
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|
|
op = (struct opt *)calloc(1, sizeof (struct opt));
|
|
if (op == NULL)
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|
err(EXIT_FAILURE, "calloc");
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op->op_name = name;
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op->op_ownfile = 0;
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op->op_value = value;
|
|
if (op2 != NULL) {
|
|
while (SLIST_NEXT(op2, op_append) != NULL)
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op2 = SLIST_NEXT(op2, op_append);
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SLIST_NEXT(op2, op_append) = op;
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|
} else
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SLIST_INSERT_HEAD(list, op, op_next);
|
|
}
|
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|
|
/*
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|
* Remove an option from the list of options.
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*/
|
|
static void
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|
rmopt_schedule(struct opt_head *list, char *name)
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|
{
|
|
struct opt *op;
|
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|
|
op = findopt(list, name);
|
|
if (op != NULL) {
|
|
SLIST_REMOVE(list, op, opt, op_next);
|
|
free(op->op_name);
|
|
free(op);
|
|
}
|
|
}
|