367 lines
8.7 KiB
C
367 lines
8.7 KiB
C
/*-
|
|
* Copyright (c) 2000,2001 Peter Wemm <peter@FreeBSD.org>
|
|
* 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/lock.h>
|
|
#include <sys/sx.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/bus.h>
|
|
|
|
/*
|
|
* Access functions for device resources.
|
|
*/
|
|
|
|
static int checkmethod = 1;
|
|
static int use_kenv;
|
|
static char *hintp;
|
|
|
|
/*
|
|
* Evil wildcarding resource string lookup.
|
|
* This walks the supplied env string table and returns a match.
|
|
* The start point can be remembered for incremental searches.
|
|
*/
|
|
static int
|
|
res_find(int *line, int *startln,
|
|
const char *name, int *unit, const char *resname, const char *value,
|
|
const char **ret_name, int *ret_namelen, int *ret_unit,
|
|
const char **ret_resname, int *ret_resnamelen, const char **ret_value)
|
|
{
|
|
int n = 0, hit, i = 0;
|
|
char r_name[32];
|
|
int r_unit;
|
|
char r_resname[32];
|
|
char r_value[128];
|
|
const char *s, *cp;
|
|
char *p;
|
|
|
|
if (checkmethod) {
|
|
switch (hintmode) {
|
|
case 0: /* loader hints in environment only */
|
|
break;
|
|
case 1: /* static hints only */
|
|
hintp = static_hints;
|
|
checkmethod = 0;
|
|
break;
|
|
case 2: /* fallback mode */
|
|
if (dynamic_kenv) {
|
|
sx_slock(&kenv_lock);
|
|
cp = kenvp[0];
|
|
for (i = 0; cp != NULL; cp = kenvp[++i]) {
|
|
if (!strncmp(cp, "hint.", 5)) {
|
|
use_kenv = 1;
|
|
checkmethod = 0;
|
|
break;
|
|
}
|
|
}
|
|
sx_sunlock(&kenv_lock);
|
|
} else {
|
|
cp = kern_envp;
|
|
while (cp) {
|
|
if (strncmp(cp, "hint.", 5) == 0) {
|
|
cp = NULL;
|
|
hintp = kern_envp;
|
|
break;
|
|
}
|
|
while (*cp != '\0')
|
|
cp++;
|
|
cp++;
|
|
if (*cp == '\0') {
|
|
cp = NULL;
|
|
hintp = static_hints;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
if (hintp == NULL) {
|
|
if (dynamic_kenv) {
|
|
use_kenv = 1;
|
|
checkmethod = 0;
|
|
} else
|
|
hintp = kern_envp;
|
|
}
|
|
}
|
|
|
|
if (use_kenv) {
|
|
sx_slock(&kenv_lock);
|
|
i = 0;
|
|
cp = kenvp[0];
|
|
if (cp == NULL) {
|
|
sx_sunlock(&kenv_lock);
|
|
return (ENOENT);
|
|
}
|
|
} else
|
|
cp = hintp;
|
|
while (cp) {
|
|
hit = 1;
|
|
(*line)++;
|
|
if (strncmp(cp, "hint.", 5) != 0)
|
|
hit = 0;
|
|
else
|
|
n = sscanf(cp, "hint.%32[^.].%d.%32[^=]=%128s",
|
|
r_name, &r_unit, r_resname, r_value);
|
|
if (hit && n != 4) {
|
|
printf("CONFIG: invalid hint '%s'\n", cp);
|
|
/* XXX: abuse bogus index() declaration */
|
|
p = index(cp, 'h');
|
|
*p = 'H';
|
|
hit = 0;
|
|
}
|
|
if (hit && startln && *startln >= 0 && *line < *startln)
|
|
hit = 0;
|
|
if (hit && name && strcmp(name, r_name) != 0)
|
|
hit = 0;
|
|
if (hit && unit && *unit != r_unit)
|
|
hit = 0;
|
|
if (hit && resname && strcmp(resname, r_resname) != 0)
|
|
hit = 0;
|
|
if (hit && value && strcmp(value, r_value) != 0)
|
|
hit = 0;
|
|
if (hit)
|
|
break;
|
|
if (use_kenv) {
|
|
cp = kenvp[++i];
|
|
if (cp == NULL)
|
|
break;
|
|
} else {
|
|
while (*cp != '\0')
|
|
cp++;
|
|
cp++;
|
|
if (*cp == '\0') {
|
|
cp = NULL;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (use_kenv)
|
|
sx_sunlock(&kenv_lock);
|
|
if (cp == NULL)
|
|
return ENOENT;
|
|
|
|
s = cp;
|
|
/* This is a bit of a hack, but at least is reentrant */
|
|
/* Note that it returns some !unterminated! strings. */
|
|
s = index(s, '.') + 1; /* start of device */
|
|
if (ret_name)
|
|
*ret_name = s;
|
|
s = index(s, '.') + 1; /* start of unit */
|
|
if (ret_namelen)
|
|
*ret_namelen = s - *ret_name - 1; /* device length */
|
|
if (ret_unit)
|
|
*ret_unit = r_unit;
|
|
s = index(s, '.') + 1; /* start of resname */
|
|
if (ret_resname)
|
|
*ret_resname = s;
|
|
s = index(s, '=') + 1; /* start of value */
|
|
if (ret_resnamelen)
|
|
*ret_resnamelen = s - *ret_resname - 1; /* value len */
|
|
if (ret_value)
|
|
*ret_value = s;
|
|
if (startln) /* line number for anchor */
|
|
*startln = *line + 1;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Search all the data sources for matches to our query. We look for
|
|
* dynamic hints first as overrides for static or fallback hints.
|
|
*/
|
|
static int
|
|
resource_find(int *line, int *startln,
|
|
const char *name, int *unit, const char *resname, const char *value,
|
|
const char **ret_name, int *ret_namelen, int *ret_unit,
|
|
const char **ret_resname, int *ret_resnamelen, const char **ret_value)
|
|
{
|
|
int i;
|
|
int un;
|
|
|
|
*line = 0;
|
|
|
|
/* Search for exact unit matches first */
|
|
i = res_find(line, startln, name, unit, resname, value,
|
|
ret_name, ret_namelen, ret_unit, ret_resname, ret_resnamelen,
|
|
ret_value);
|
|
if (i == 0)
|
|
return 0;
|
|
if (unit == NULL)
|
|
return ENOENT;
|
|
/* If we are still here, search for wildcard matches */
|
|
un = -1;
|
|
i = res_find(line, startln, name, &un, resname, value,
|
|
ret_name, ret_namelen, ret_unit, ret_resname, ret_resnamelen,
|
|
ret_value);
|
|
if (i == 0)
|
|
return 0;
|
|
return ENOENT;
|
|
}
|
|
|
|
int
|
|
resource_int_value(const char *name, int unit, const char *resname, int *result)
|
|
{
|
|
int error;
|
|
const char *str;
|
|
char *op;
|
|
unsigned long val;
|
|
int line;
|
|
|
|
line = 0;
|
|
error = resource_find(&line, NULL, name, &unit, resname, NULL,
|
|
NULL, NULL, NULL, NULL, NULL, &str);
|
|
if (error)
|
|
return error;
|
|
if (*str == '\0')
|
|
return EFTYPE;
|
|
val = strtoul(str, &op, 0);
|
|
if (*op != '\0')
|
|
return EFTYPE;
|
|
*result = val;
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
resource_long_value(const char *name, int unit, const char *resname,
|
|
long *result)
|
|
{
|
|
int error;
|
|
const char *str;
|
|
char *op;
|
|
unsigned long val;
|
|
int line;
|
|
|
|
line = 0;
|
|
error = resource_find(&line, NULL, name, &unit, resname, NULL,
|
|
NULL, NULL, NULL, NULL, NULL, &str);
|
|
if (error)
|
|
return error;
|
|
if (*str == '\0')
|
|
return EFTYPE;
|
|
val = strtoul(str, &op, 0);
|
|
if (*op != '\0')
|
|
return EFTYPE;
|
|
*result = val;
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
resource_string_value(const char *name, int unit, const char *resname,
|
|
const char **result)
|
|
{
|
|
int error;
|
|
const char *str;
|
|
int line;
|
|
|
|
line = 0;
|
|
error = resource_find(&line, NULL, name, &unit, resname, NULL,
|
|
NULL, NULL, NULL, NULL, NULL, &str);
|
|
if (error)
|
|
return error;
|
|
*result = str;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* This is a bit nasty, but allows us to not modify the env strings.
|
|
*/
|
|
static const char *
|
|
resource_string_copy(const char *s, int len)
|
|
{
|
|
static char stringbuf[256];
|
|
static int offset = 0;
|
|
const char *ret;
|
|
|
|
if (len == 0)
|
|
len = strlen(s);
|
|
if (len > 255)
|
|
return NULL;
|
|
if ((offset + len + 1) > 255)
|
|
offset = 0;
|
|
bcopy(s, &stringbuf[offset], len);
|
|
stringbuf[offset + len] = '\0';
|
|
ret = &stringbuf[offset];
|
|
offset += len + 1;
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* err = resource_find_at(&anchor, &name, &unit, resname, value)
|
|
* Iteratively fetch a list of devices wired "at" something
|
|
* res and value are restrictions. eg: "at", "scbus0".
|
|
* For practical purposes, res = required, value = optional.
|
|
* *name and *unit are set.
|
|
* set *anchor to zero before starting.
|
|
*/
|
|
int
|
|
resource_find_match(int *anchor, const char **name, int *unit,
|
|
const char *resname, const char *value)
|
|
{
|
|
const char *found_name;
|
|
int found_namelen;
|
|
int found_unit;
|
|
int ret;
|
|
int newln;
|
|
|
|
newln = *anchor;
|
|
ret = resource_find(anchor, &newln, NULL, NULL, resname, value,
|
|
&found_name, &found_namelen, &found_unit, NULL, NULL, NULL);
|
|
if (ret == 0) {
|
|
*name = resource_string_copy(found_name, found_namelen);
|
|
*unit = found_unit;
|
|
}
|
|
*anchor = newln;
|
|
return ret;
|
|
}
|
|
|
|
|
|
/*
|
|
* err = resource_find_dev(&anchor, name, &unit, res, value);
|
|
* Iterate through a list of devices, returning their unit numbers.
|
|
* res and value are optional restrictions. eg: "at", "scbus0".
|
|
* *unit is set to the value.
|
|
* set *anchor to zero before starting.
|
|
*/
|
|
int
|
|
resource_find_dev(int *anchor, const char *name, int *unit,
|
|
const char *resname, const char *value)
|
|
{
|
|
int found_unit;
|
|
int newln;
|
|
int ret;
|
|
|
|
newln = *anchor;
|
|
ret = resource_find(anchor, &newln, name, NULL, resname, value,
|
|
NULL, NULL, &found_unit, NULL, NULL, NULL);
|
|
if (ret == 0) {
|
|
*unit = found_unit;
|
|
}
|
|
*anchor = newln;
|
|
return ret;
|
|
}
|