svn commit: r337336 - in stable/11/sys: kern sys
Kyle Evans
kevans at FreeBSD.org
Sat Aug 4 22:15:06 UTC 2018
Author: kevans
Date: Sat Aug 4 22:15:05 2018
New Revision: 337336
URL: https://svnweb.freebsd.org/changeset/base/337336
Log:
MFC r336152-r336154, r336157
r336152:
subr_hints: Use goto/label instead of series of conditionals
r336153:
subr_hints: Convert some bool-like ints to bools
r336154:
subr_hints: Skip static_env and static_hints if they don't contain hints
This is possible because, well, they're static. Both the dynamic environment
and the MD-environment (generally loader(8) environment) can potentially
have room for new variables to be set, and thus do not receive this
treatment.
r336157:
kern_environment: bool'itize dynamic_kenv; fix small style(9) nit
Modified:
stable/11/sys/kern/kern_environment.c
stable/11/sys/kern/subr_hints.c
stable/11/sys/sys/systm.h
Directory Properties:
stable/11/ (props changed)
Modified: stable/11/sys/kern/kern_environment.c
==============================================================================
--- stable/11/sys/kern/kern_environment.c Sat Aug 4 22:12:12 2018 (r337335)
+++ stable/11/sys/kern/kern_environment.c Sat Aug 4 22:15:05 2018 (r337336)
@@ -37,7 +37,6 @@
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
-#include <sys/types.h>
#include <sys/param.h>
#include <sys/proc.h>
#include <sys/queue.h>
@@ -79,7 +78,7 @@ struct mtx kenv_lock;
/*
* No need to protect this with a mutex since SYSINITS are single threaded.
*/
-int dynamic_kenv = 0;
+bool dynamic_kenv;
#define KENV_CHECK if (!dynamic_kenv) \
panic("%s: called before SI_SUB_KMEM", __func__)
@@ -98,7 +97,7 @@ sys_kenv(td, uap)
size_t len, done, needed, buflen;
int error, i;
- KASSERT(dynamic_kenv, ("kenv: dynamic_kenv = 0"));
+ KASSERT(dynamic_kenv, ("kenv: dynamic_kenv = false"));
error = 0;
if (uap->what == KENV_DUMP) {
@@ -352,7 +351,7 @@ init_dynamic_kenv(void *data __unused)
kenvp[dynamic_envpos] = NULL;
mtx_init(&kenv_lock, "kernel environment", NULL, MTX_DEF);
- dynamic_kenv = 1;
+ dynamic_kenv = true;
}
SYSINIT(kenv, SI_SUB_KMEM + 1, SI_ORDER_FIRST, init_dynamic_kenv, NULL);
@@ -506,7 +505,7 @@ kern_setenv(const char *name, const char *value)
char *buf, *cp, *oldenv;
int namelen, vallen, i;
- if (dynamic_kenv == 0 && md_env_len > 0)
+ if (!dynamic_kenv && md_env_len > 0)
return (setenv_static(name, value));
KENV_CHECK;
Modified: stable/11/sys/kern/subr_hints.c
==============================================================================
--- stable/11/sys/kern/subr_hints.c Sat Aug 4 22:12:12 2018 (r337335)
+++ stable/11/sys/kern/subr_hints.c Sat Aug 4 22:15:05 2018 (r337336)
@@ -46,8 +46,10 @@ __FBSDID("$FreeBSD$");
* has already been setup (dynamic_kenv) and that we have added any supplied
* static_hints to the dynamic environment.
*/
-static int hintenv_merged;
-
+static bool hintenv_merged;
+/* Static environment and static hints cannot change, so we'll skip known bad */
+static bool stenv_skip;
+static bool sthints_skip;
/*
* Access functions for device resources.
*/
@@ -82,7 +84,7 @@ static_hints_to_env(void *data __unused)
free(line, M_TEMP);
cp += i + 1;
}
- hintenv_merged = 1;
+ hintenv_merged = true;
}
/* Any time after dynamic env is setup */
@@ -122,13 +124,14 @@ res_find(char **hintp_cookie, int *line, int *startln,
const char **ret_name, int *ret_namelen, int *ret_unit,
const char **ret_resname, int *ret_resnamelen, const char **ret_value)
{
- int dyn_used = 0, fbacklvl = FBACK_MDENV, hit, i = 0, n = 0;
+ int fbacklvl = FBACK_MDENV, i = 0, n = 0;
char r_name[32];
int r_unit;
char r_resname[32];
char r_value[128];
const char *s, *cp;
char *hintp, *p;
+ bool dyn_used = false;
/*
@@ -155,7 +158,7 @@ res_find(char **hintp_cookie, int *line, int *startln,
}
}
mtx_unlock(&kenv_lock);
- dyn_used = 1;
+ dyn_used = true;
} else {
/*
* We'll have a chance to keep coming back here until
@@ -176,17 +179,21 @@ fallback:
}
fbacklvl++;
- if (fbacklvl <= FBACK_STENV &&
+ if (!stenv_skip && fbacklvl <= FBACK_STENV &&
_res_checkenv(kern_envp)) {
hintp = kern_envp;
goto found;
- }
+ } else
+ stenv_skip = true;
+
fbacklvl++;
/* We'll fallback to static_hints if needed/can */
- if (fbacklvl <= FBACK_STATIC &&
+ if (!sthints_skip && fbacklvl <= FBACK_STATIC &&
_res_checkenv(static_hints))
hintp = static_hints;
+ else
+ sthints_skip = true;
found:
fbacklvl++;
}
@@ -197,7 +204,7 @@ found:
} else {
hintp = *hintp_cookie;
if (hintenv_merged && hintp == kenvp[0])
- dyn_used = 1;
+ dyn_used = true;
else
/*
* If we aren't using the dynamic environment, we need
@@ -215,34 +222,30 @@ found:
cp = hintp;
while (cp) {
- hit = 1;
(*line)++;
if (strncmp(cp, "hint.", 5) != 0)
- hit = 0;
- else
- n = sscanf(cp, "hint.%32[^.].%d.%32[^=]=%127s",
- r_name, &r_unit, r_resname, r_value);
- /* We'll circumvent all of the checks if we already know */
- if (hit) {
- if (n != 4) {
- printf("CONFIG: invalid hint '%s'\n", cp);
- p = strchr(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;
+ goto nexthint;
+ n = sscanf(cp, "hint.%32[^.].%d.%32[^=]=%127s", r_name, &r_unit,
+ r_resname, r_value);
+ if (n != 4) {
+ printf("CONFIG: invalid hint '%s'\n", cp);
+ p = strchr(cp, 'h');
+ *p = 'H';
+ goto nexthint;
}
+ if (startln && *startln >= 0 && *line < *startln)
+ goto nexthint;
+ if (name && strcmp(name, r_name) != 0)
+ goto nexthint;
+ if (unit && *unit != r_unit)
+ goto nexthint;
+ if (resname && strcmp(resname, r_resname) != 0)
+ goto nexthint;
+ if (value && strcmp(value, r_value) != 0)
+ goto nexthint;
+ /* Successfully found a hint matching all criteria */
+ break;
+nexthint:
if (dyn_used) {
cp = kenvp[++i];
if (cp == NULL)
Modified: stable/11/sys/sys/systm.h
==============================================================================
--- stable/11/sys/sys/systm.h Sat Aug 4 22:12:12 2018 (r337335)
+++ stable/11/sys/sys/systm.h Sat Aug 4 22:15:05 2018 (r337336)
@@ -148,7 +148,7 @@ void kassert_panic(const char *fmt, ...) __printflike
* XXX most of these variables should be const.
*/
extern int osreldate;
-extern int dynamic_kenv;
+extern bool dynamic_kenv;
extern struct mtx kenv_lock;
extern char *kern_envp;
extern char *md_envp;
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