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📄 Make.tags.inc(2.13 KB)
📄 Makefile(302 B)
📄 bus_if.m(26.31 KB)
📄 capabilities.conf(13.67 KB)
📄 clock_if.m(1.7 KB)
📄 cpufreq_if.m(2.27 KB)
📄 device_if.m(10.41 KB)
📄 firmw.S(2.15 KB)
📄 genassym.sh(1.11 KB)
📄 genoffset.c(1.68 KB)
📄 genoffset.sh(3.58 KB)
📄 imgact_aout.c(9.45 KB)
📄 imgact_binmisc.c(18.64 KB)
📄 imgact_elf.c(76.32 KB)
📄 imgact_elf32.c(1.47 KB)
📄 imgact_elf64.c(1.47 KB)
📄 imgact_shell.c(8.41 KB)
📄 init_main.c(24.31 KB)
📄 init_sysent.c(95.3 KB)
📄 kern_acct.c(19.03 KB)
📄 kern_alq.c(24.97 KB)
📄 kern_clock.c(21.12 KB)
📄 kern_clocksource.c(23.34 KB)
📄 kern_condvar.c(11.28 KB)
📄 kern_conf.c(36.14 KB)
📄 kern_cons.c(15.75 KB)
📄 kern_context.c(3.59 KB)
📄 kern_cpu.c(30.77 KB)
📄 kern_cpuset.c(59.78 KB)
📄 kern_ctf.c(8.73 KB)
📄 kern_descrip.c(112.87 KB)
📄 kern_dtrace.c(2.94 KB)
📄 kern_dump.c(8.51 KB)
📄 kern_environment.c(22.75 KB)
📄 kern_et.c(7.1 KB)
📄 kern_event.c(62.49 KB)
📄 kern_exec.c(46.67 KB)
📄 kern_exit.c(34.61 KB)
📄 kern_fail.c(29.32 KB)
📄 kern_ffclock.c(12.66 KB)
📄 kern_fork.c(28.29 KB)
📄 kern_hhook.c(13.58 KB)
📄 kern_idle.c(2.74 KB)
📄 kern_intr.c(40.44 KB)
📄 kern_jail.c(112.67 KB)
📄 kern_kcov.c(15.32 KB)
📄 kern_khelp.c(9.45 KB)
📄 kern_kthread.c(11.8 KB)
📄 kern_ktr.c(11.93 KB)
📄 kern_ktrace.c(31.41 KB)
📄 kern_linker.c(54.3 KB)
📄 kern_lock.c(46.99 KB)
📄 kern_lockf.c(64.46 KB)
📄 kern_lockstat.c(3.8 KB)
📄 kern_loginclass.c(6.69 KB)
📄 kern_malloc.c(37.09 KB)
📄 kern_mbuf.c(43.16 KB)
📄 kern_mib.c(24.26 KB)
📄 kern_module.c(11.05 KB)
📄 kern_mtxpool.c(5.82 KB)
📄 kern_mutex.c(33.62 KB)
📄 kern_ntptime.c(32.49 KB)
📄 kern_osd.c(12.37 KB)
📄 kern_physio.c(5.74 KB)
📄 kern_pmc.c(8.89 KB)
📄 kern_poll.c(15.86 KB)
📄 kern_priv.c(9.14 KB)
📄 kern_proc.c(80.01 KB)
📄 kern_procctl.c(19.48 KB)
📄 kern_prot.c(57.94 KB)
📄 kern_racct.c(34.01 KB)
📄 kern_rangelock.c(8.67 KB)
📄 kern_rctl.c(53.87 KB)
📄 kern_resource.c(36.66 KB)
📄 kern_rmlock.c(28.27 KB)
📄 kern_rwlock.c(40.72 KB)
📄 kern_sdt.c(2.05 KB)
📄 kern_sema.c(4.85 KB)
📄 kern_sendfile.c(33.97 KB)
📄 kern_sharedpage.c(10.37 KB)
📄 kern_shutdown.c(43.34 KB)
📄 kern_sig.c(101.89 KB)
📄 kern_switch.c(13.85 KB)
📄 kern_sx.c(40.27 KB)
📄 kern_synch.c(18.17 KB)
📄 kern_syscalls.c(6.74 KB)
📄 kern_sysctl.c(67.24 KB)
📄 kern_tc.c(55.73 KB)
📄 kern_thr.c(14.14 KB)
📄 kern_thread.c(41.75 KB)
📄 kern_time.c(40.89 KB)
📄 kern_timeout.c(43.08 KB)
📄 kern_tslog.c(3.44 KB)
📄 kern_ubsan.c(50.74 KB)
📄 kern_umtx.c(107.14 KB)
📄 kern_uuid.c(11.68 KB)
📄 kern_xxx.c(10.44 KB)
📄 ksched.c(6.56 KB)
📄 link_elf.c(47.99 KB)
📄 link_elf_obj.c(44.41 KB)
📄 linker_if.m(3.96 KB)
📄 makesyscalls.sh(23.57 KB)
📄 md4c.c(7.89 KB)
📄 md5c.c(9.56 KB)
📄 msi_if.m(2.48 KB)
📄 p1003_1b.c(8.84 KB)
📄 pic_if.m(3.9 KB)
📄 posix4_mib.c(5.59 KB)
📄 sched_4bsd.c(45.03 KB)
📄 sched_ule.c(82.65 KB)
📄 serdev_if.m(3.49 KB)
📄 stack_protector.c(613 B)
📄 subr_acl_nfs4.c(37.42 KB)
📄 subr_acl_posix1e.c(17.71 KB)
📄 subr_atomic64.c(3.97 KB)
📄 subr_autoconf.c(7.7 KB)
📄 subr_blist.c(31.88 KB)
📄 subr_boot.c(5.8 KB)
📄 subr_bufring.c(2.21 KB)
📄 subr_bus.c(145.4 KB)
📄 subr_bus_dma.c(19.67 KB)
📄 subr_busdma_bufalloc.c(5.24 KB)
📄 subr_capability.c(11.93 KB)
📄 subr_clock.c(10.61 KB)
📄 subr_compressor.c(13.11 KB)
📄 subr_counter.c(4.44 KB)
📄 subr_coverage.c(6.17 KB)
📄 subr_csan.c(25.39 KB)
📄 subr_devmap.c(9.8 KB)
📄 subr_devstat.c(16.21 KB)
📄 subr_disk.c(8.54 KB)
📄 subr_dummy_vdso_tc.c(1.7 KB)
📄 subr_early.c(2.26 KB)
📄 subr_epoch.c(25.02 KB)
📄 subr_eventhandler.c(9.17 KB)
📄 subr_fattime.c(9.98 KB)
📄 subr_filter.c(12.2 KB)
📄 subr_firmware.c(13.88 KB)
📄 subr_gtaskqueue.c(20.19 KB)
📄 subr_hash.c(4.8 KB)
📄 subr_hints.c(12.87 KB)
📄 subr_intr.c(40.61 KB)
📄 subr_kdb.c(16.13 KB)
📄 subr_kobj.c(7.1 KB)
📄 subr_lock.c(18.81 KB)
📄 subr_log.c(7.64 KB)
📄 subr_mchain.c(11.06 KB)
📄 subr_module.c(12.98 KB)
📄 subr_msgbuf.c(10.6 KB)
📄 subr_param.c(10.93 KB)
📄 subr_pcpu.c(10.18 KB)
📄 subr_pctrie.c(20.99 KB)
📄 subr_physmem.c(11.52 KB)
📄 subr_pidctrl.c(5.43 KB)
📄 subr_power.c(3.13 KB)
📄 subr_prf.c(27.42 KB)
📄 subr_prng.c(3.36 KB)
📄 subr_prof.c(15.43 KB)
📄 subr_rangeset.c(8.5 KB)
📄 subr_rman.c(27.61 KB)
📄 subr_rtc.c(11.42 KB)
📄 subr_sbuf.c(20.53 KB)
📄 subr_scanf.c(15.59 KB)
📄 subr_sfbuf.c(6.17 KB)
📄 subr_sglist.c(22.83 KB)
📄 subr_sleepqueue.c(39.43 KB)
📄 subr_smp.c(31.62 KB)
📄 subr_smr.c(20.17 KB)
📄 subr_stack.c(6.47 KB)
📄 subr_stats.c(103.01 KB)
📄 subr_syscall.c(7.98 KB)
📄 subr_taskqueue.c(21.1 KB)
📄 subr_terminal.c(15.52 KB)
📄 subr_trap.c(10.87 KB)
📄 subr_turnstile.c(35.58 KB)
📄 subr_uio.c(11.38 KB)
📄 subr_unit.c(22.97 KB)
📄 subr_vmem.c(43.25 KB)
📄 subr_witness.c(84.59 KB)
📄 sys_capability.c(15.06 KB)
📄 sys_eventfd.c(8.42 KB)
📄 sys_generic.c(44.22 KB)
📄 sys_getrandom.c(4.21 KB)
📄 sys_pipe.c(45.14 KB)
📄 sys_procdesc.c(14.57 KB)
📄 sys_process.c(30.73 KB)
📄 sys_socket.c(20.11 KB)
📄 syscalls.c(22.73 KB)
📄 syscalls.master(60.26 KB)
📄 systrace_args.c(178.49 KB)
📄 sysv_ipc.c(6.53 KB)
📄 sysv_msg.c(48.65 KB)
📄 sysv_sem.c(49.85 KB)
📄 sysv_shm.c(43.93 KB)
📄 tty.c(55.14 KB)
📄 tty_compat.c(11.46 KB)
📄 tty_info.c(9.93 KB)
📄 tty_inq.c(12.22 KB)
📄 tty_outq.c(8.74 KB)
📄 tty_pts.c(19.74 KB)
📄 tty_tty.c(2.83 KB)
📄 tty_ttydisc.c(28.6 KB)
📄 uipc_accf.c(8.07 KB)
📄 uipc_debug.c(12.42 KB)
📄 uipc_domain.c(13.13 KB)
📄 uipc_ktls.c(55.7 KB)
📄 uipc_mbuf.c(52.45 KB)
📄 uipc_mbuf2.c(12.64 KB)
📄 uipc_mbufhash.c(4.9 KB)
📄 uipc_mqueue.c(64.64 KB)
📄 uipc_sem.c(25.18 KB)
📄 uipc_shm.c(50.47 KB)
📄 uipc_sockbuf.c(42.9 KB)
📄 uipc_socket.c(110.61 KB)
📄 uipc_syscalls.c(35.94 KB)
📄 uipc_usrreq.c(75.11 KB)
📄 vfs_acl.c(14.5 KB)
📄 vfs_aio.c(76.32 KB)
📄 vfs_bio.c(145.39 KB)
📄 vfs_cache.c(143.09 KB)
📄 vfs_cluster.c(28.36 KB)
📄 vfs_default.c(33.16 KB)
📄 vfs_export.c(14.55 KB)
📄 vfs_extattr.c(17.91 KB)
📄 vfs_hash.c(6 KB)
📄 vfs_init.c(15.86 KB)
📄 vfs_lookup.c(45.48 KB)
📄 vfs_mount.c(62.58 KB)
📄 vfs_mountroot.c(26.23 KB)
📄 vfs_subr.c(167.52 KB)
📄 vfs_syscalls.c(106.86 KB)
📄 vfs_vnops.c(86.28 KB)
📄 vnode_if.src(13.66 KB)

Editing: subr_kobj.c

/*-
 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
 *
 * Copyright (c) 2000,2003 Doug Rabson
 * 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.
 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");

#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/kobj.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mutex.h>
#include <sys/sysctl.h>
#ifndef TEST
#include <sys/systm.h>
#endif

#ifdef TEST
#include "usertest.h"
#endif

static MALLOC_DEFINE(M_KOBJ, "kobj", "Kernel object structures");

#ifdef KOBJ_STATS

u_int kobj_lookup_hits;
u_int kobj_lookup_misses;

SYSCTL_UINT(_kern, OID_AUTO, kobj_hits, CTLFLAG_RD,
	   &kobj_lookup_hits, 0, "");
SYSCTL_UINT(_kern, OID_AUTO, kobj_misses, CTLFLAG_RD,
	   &kobj_lookup_misses, 0, "");

#endif

static struct mtx kobj_mtx;
static int kobj_mutex_inited;
static int kobj_next_id = 1;

#define	KOBJ_LOCK()		mtx_lock(&kobj_mtx)
#define	KOBJ_UNLOCK()		mtx_unlock(&kobj_mtx)
#define	KOBJ_ASSERT(what)	mtx_assert(&kobj_mtx, what);

SYSCTL_INT(_kern, OID_AUTO, kobj_methodcount, CTLFLAG_RD,
    &kobj_next_id, 0,
    "Number of kernel object methods registered");

static void
kobj_init_mutex(void *arg)
{
	if (!kobj_mutex_inited) {
		mtx_init(&kobj_mtx, "kobj", NULL, MTX_DEF);
		kobj_mutex_inited = 1;
	}
}

SYSINIT(kobj, SI_SUB_LOCK, SI_ORDER_ANY, kobj_init_mutex, NULL);

/*
 * This method structure is used to initialise new caches. Since the
 * desc pointer is NULL, it is guaranteed never to match any read
 * descriptors.
 */
static const struct kobj_method null_method = {
	0, 0,
};

int
kobj_error_method(void)
{

return ENXIO;
}

static void
kobj_class_compile_common(kobj_class_t cls, kobj_ops_t ops)
{
	kobj_method_t *m;
	int i;

/*
	 * Don't do anything if we are already compiled.
	 */
	if (cls->ops)
		return;

/*
	 * First register any methods which need it.
	 */
	for (i = 0, m = cls->methods; m->desc; i++, m++) {
		if (m->desc->id == 0)
			m->desc->id = kobj_next_id++;
	}

/*
	 * Then initialise the ops table.
	 */
	for (i = 0; i < KOBJ_CACHE_SIZE; i++)
		ops->cache[i] = &null_method;
	ops->cls = cls;
	cls->ops = ops;
}

static int
kobj_class_compile1(kobj_class_t cls, int mflags)
{
	kobj_ops_t ops;

KOBJ_ASSERT(MA_NOTOWNED);

ops = malloc(sizeof(struct kobj_ops), M_KOBJ, mflags);
	if (ops == NULL)
		return (ENOMEM);

/*
	 * We may have lost a race for kobj_class_compile here - check
	 * to make sure someone else hasn't already compiled this
	 * class.
	 */
	KOBJ_LOCK();
	if (cls->ops) {
		KOBJ_UNLOCK();
		free(ops, M_KOBJ);
		return (0);
	}
	kobj_class_compile_common(cls, ops);
	KOBJ_UNLOCK();
	return (0);
}

void
kobj_class_compile(kobj_class_t cls)
{
	int error;

error = kobj_class_compile1(cls, M_WAITOK);
	KASSERT(error == 0, ("kobj_class_compile1 returned %d", error));
}

void
kobj_class_compile_static(kobj_class_t cls, kobj_ops_t ops)
{

KASSERT(kobj_mutex_inited == 0,
	    ("%s: only supported during early cycles", __func__));

/*
	 * Increment refs to make sure that the ops table is not freed.
	 */
	cls->refs++;
	kobj_class_compile_common(cls, ops);
}

static kobj_method_t*
kobj_lookup_method_class(kobj_class_t cls, kobjop_desc_t desc)
{
	kobj_method_t *methods = cls->methods;
	kobj_method_t *ce;

for (ce = methods; ce && ce->desc; ce++) {
		if (ce->desc == desc) {
			return ce;
		}
	}

return NULL;
}

static kobj_method_t*
kobj_lookup_method_mi(kobj_class_t cls,
		      kobjop_desc_t desc)
{
	kobj_method_t *ce;
	kobj_class_t *basep;

ce = kobj_lookup_method_class(cls, desc);
	if (ce)
		return ce;

basep = cls->baseclasses;
	if (basep) {
		for (; *basep; basep++) {
			ce = kobj_lookup_method_mi(*basep, desc);
			if (ce)
				return ce;
		}
	}

return NULL;
}

kobj_method_t*
kobj_lookup_method(kobj_class_t cls,
		   kobj_method_t **cep,
		   kobjop_desc_t desc)
{
	kobj_method_t *ce;

ce = kobj_lookup_method_mi(cls, desc);
	if (!ce)
		ce = &desc->deflt;
	if (cep)
		*cep = ce;
	return ce;
}

void
kobj_class_free(kobj_class_t cls)
{
	void* ops = NULL;

KOBJ_ASSERT(MA_NOTOWNED);
	KOBJ_LOCK();

/*
	 * Protect against a race between kobj_create and
	 * kobj_delete.
	 */
	if (cls->refs == 0) {
		/*
		 * For now we don't do anything to unregister any methods
		 * which are no longer used.
		 */

/*
		 * Free memory and clean up.
		 */
		ops = cls->ops;
		cls->ops = NULL;
	}

KOBJ_UNLOCK();

if (ops)
		free(ops, M_KOBJ);
}

static void
kobj_init_common(kobj_t obj, kobj_class_t cls)
{

obj->ops = cls->ops;
	cls->refs++;
}

static int
kobj_init1(kobj_t obj, kobj_class_t cls, int mflags)
{
	int error;

KOBJ_LOCK();
	while (cls->ops == NULL) {
		/*
		 * kobj_class_compile doesn't want the lock held
		 * because of the call to malloc - we drop the lock
		 * and re-try.
		 */
		KOBJ_UNLOCK();
		error = kobj_class_compile1(cls, mflags);
		if (error != 0)
			return (error);
		KOBJ_LOCK();
	}
	kobj_init_common(obj, cls);
	KOBJ_UNLOCK();
	return (0);
}

kobj_t
kobj_create(kobj_class_t cls, struct malloc_type *mtype, int mflags)
{
	kobj_t obj;

obj = malloc(cls->size, mtype, mflags | M_ZERO);
	if (obj == NULL)
		return (NULL);
	if (kobj_init1(obj, cls, mflags) != 0) {
		free(obj, mtype);
		return (NULL);
	}
	return (obj);
}

void
kobj_init(kobj_t obj, kobj_class_t cls)
{
	int error;

error = kobj_init1(obj, cls, M_NOWAIT);
	if (error != 0)
		panic("kobj_init1 failed: error %d", error);
}

void
kobj_init_static(kobj_t obj, kobj_class_t cls)
{

KASSERT(kobj_mutex_inited == 0,
	    ("%s: only supported during early cycles", __func__));

kobj_init_common(obj, cls);
}

void
kobj_delete(kobj_t obj, struct malloc_type *mtype)
{
	kobj_class_t cls = obj->ops->cls;
	int refs;

/*
	 * Consider freeing the compiled method table for the class
	 * after its last instance is deleted. As an optimisation, we
	 * should defer this for a short while to avoid thrashing.
	 */
	KOBJ_ASSERT(MA_NOTOWNED);
	KOBJ_LOCK();
	cls->refs--;
	refs = cls->refs;
	KOBJ_UNLOCK();

if (!refs)
		kobj_class_free(cls);

obj->ops = NULL;
	if (mtype)
		free(obj, mtype);
}

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Editing: subr_kobj.c

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