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autoconf(9): Take kernel lock on various entries into autoconf. 

Most of autoconf still tacitly assumes the kernel lock is held.
This commit is contained in:
riastradh 2021-06-12 12:11:49 +00:00
parent 777d347a77
commit 5a0c6b14f9
1 changed files with 27 additions and 10 deletions
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35
sys/kern/subr_autoconf.c
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@ -1,4 +1,4 @@
/* $NetBSD: subr_autoconf.c,v 1.280 2021/04/28 03:21:57 thorpej Exp $ */
/* $NetBSD: subr_autoconf.c,v 1.281 2021/06/12 12:11:49 riastradh Exp $ */
/*
* Copyright (c) 1996, 2000 Christopher G. Demetriou
@ -79,7 +79,7 @@
#define __SUBR_AUTOCONF_PRIVATE /* see <sys/device.h> */
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: subr_autoconf.c,v 1.280 2021/04/28 03:21:57 thorpej Exp $");
__KERNEL_RCSID(0, "$NetBSD: subr_autoconf.c,v 1.281 2021/06/12 12:11:49 riastradh Exp $");
#ifdef _KERNEL_OPT
#include "opt_ddb.h"
@ -1285,11 +1285,15 @@ device_t
config_rootfound(const char *rootname, void *aux)
{
cfdata_t cf;
device_t dev = NULL;
KERNEL_LOCK(1, NULL);
if ((cf = config_rootsearch(NULL, rootname, aux)) != NULL)
return config_attach(ROOT, cf, aux, NULL, CFARG_EOL);
dev = config_attach(ROOT, cf, aux, NULL, CFARG_EOL);
else
aprint_error("root device %s not configured\n", rootname);
return NULL;
KERNEL_UNLOCK_ONE(NULL);
return dev;
}
/* just like sprintf(buf, "%d") except that it works from the end */
@ -2046,8 +2050,10 @@ config_detach_all(int how)
bool progress = false;
int flags;
KERNEL_LOCK(1, NULL);
if ((how & (RB_NOSYNC|RB_DUMP)) != 0)
return false;
goto out;
if ((how & RB_POWERDOWN) == RB_POWERDOWN)
flags = DETACH_SHUTDOWN | DETACH_POWEROFF;
@ -2063,6 +2069,8 @@ config_detach_all(int how)
} else
aprint_debug("failed.");
}
out: KERNEL_UNLOCK_ONE(NULL);
return progress;
}
@ -2286,6 +2294,9 @@ int
config_finalize_register(device_t dev, int (*fn)(device_t))
{
struct finalize_hook *f;
int error = 0;
KERNEL_LOCK(1, NULL);
/*
* If finalization has already been done, invoke the
@ -2294,13 +2305,15 @@ config_finalize_register(device_t dev, int (*fn)(device_t))
if (config_finalize_done) {
while ((*fn)(dev) != 0)
/* loop */ ;
return 0;
goto out;
}
/* Ensure this isn't already on the list. */
TAILQ_FOREACH(f, &config_finalize_list, f_list) {
if (f->f_func == fn && f->f_dev == dev)
return EEXIST;
if (f->f_func == fn && f->f_dev == dev) {
error = EEXIST;
goto out;
}
}
f = kmem_alloc(sizeof(*f), KM_SLEEP);
@ -2308,7 +2321,11 @@ config_finalize_register(device_t dev, int (*fn)(device_t))
f->f_dev = dev;
TAILQ_INSERT_TAIL(&config_finalize_list, f, f_list);
return 0;
/* Success! */
error = 0;
out: KERNEL_UNLOCK_ONE(NULL);
return error;
}
void