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📄 device_if.m(10.41 KB)
📄 firmw.S(2.15 KB)
📄 genassym.sh(1.11 KB)
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📄 imgact_elf.c(76.32 KB)
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📄 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)
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📄 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_eventhandler.c

/*-
 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
 *
 * Copyright (c) 1999 Michael Smith <msmith@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.
 */

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

#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/ktr.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mutex.h>
#include <sys/proc.h>
#include <sys/systm.h>
#include <sys/eventhandler.h>

static MALLOC_DEFINE(M_EVENTHANDLER, "eventhandler", "Event handler records");

/* List of all eventhandler lists */
static TAILQ_HEAD(, eventhandler_list)	eventhandler_lists;
static int				eventhandler_lists_initted = 0;
static struct mtx			eventhandler_mutex;

struct eventhandler_entry_generic 
{
    struct eventhandler_entry	ee;
    void			(* func)(void);
};

static struct eventhandler_list *_eventhandler_find_list(const char *name);

/*
 * Initialize the eventhandler mutex and list.
 */
static void
eventhandler_init(void *dummy __unused)
{
    TAILQ_INIT(&eventhandler_lists);
    mtx_init(&eventhandler_mutex, "eventhandler", NULL, MTX_DEF);
    atomic_store_rel_int(&eventhandler_lists_initted, 1);
}
SYSINIT(eventhandlers, SI_SUB_EVENTHANDLER, SI_ORDER_FIRST, eventhandler_init,
    NULL);

static struct eventhandler_list *
eventhandler_find_or_create_list(const char *name)
{
	struct eventhandler_list *list, *new_list;

/* look for a matching, existing list */
	list = _eventhandler_find_list(name);

/* Do we need to create the list? */
	if (list == NULL) {
	    mtx_unlock(&eventhandler_mutex);

new_list = malloc(sizeof(*new_list) + strlen(name) + 1,
		M_EVENTHANDLER, M_WAITOK | M_ZERO);

/* If someone else created it already, then use that one. */
	    mtx_lock(&eventhandler_mutex);
	    list = _eventhandler_find_list(name);
	    if (list != NULL) {
		free(new_list, M_EVENTHANDLER);
	    } else {
		CTR2(KTR_EVH, "%s: creating list \"%s\"", __func__, name);
		list = new_list;
		TAILQ_INIT(&list->el_entries);
		list->el_name = (char *)(list + 1);
		strcpy(list->el_name, name);
		mtx_init(&list->el_lock, list->el_name, "eventhandler list",
		    MTX_DEF);
		TAILQ_INSERT_HEAD(&eventhandler_lists, list, el_link);
	    }
	}
	return (list);
}

/* 
 * Insertion is O(n) due to the priority scan, but optimises to O(1)
 * if all priorities are identical.
 */
static eventhandler_tag
eventhandler_register_internal(struct eventhandler_list *list,
    const char *name, eventhandler_tag epn)
{
    struct eventhandler_entry		*ep;
    
    KASSERT(eventhandler_lists_initted, ("eventhandler registered too early"));
    KASSERT(epn != NULL, ("%s: cannot register NULL event", __func__));

/* Do we need to find/create the list? */
    if (list == NULL) {
	    mtx_lock(&eventhandler_mutex);
	    list = eventhandler_find_or_create_list(name);
	    mtx_unlock(&eventhandler_mutex);
    }

KASSERT(epn->ee_priority != EHE_DEAD_PRIORITY,
	("%s: handler for %s registered with dead priority", __func__, name));

/* sort it into the list */
    CTR4(KTR_EVH, "%s: adding item %p (function %p) to \"%s\"", __func__, epn,
	((struct eventhandler_entry_generic *)epn)->func, name);
    EHL_LOCK(list);
    TAILQ_FOREACH(ep, &list->el_entries, ee_link) {
	if (ep->ee_priority != EHE_DEAD_PRIORITY &&
	    epn->ee_priority < ep->ee_priority) {
	    TAILQ_INSERT_BEFORE(ep, epn, ee_link);
	    break;
	}
    }
    if (ep == NULL)
	TAILQ_INSERT_TAIL(&list->el_entries, epn, ee_link);
    EHL_UNLOCK(list);
    return(epn);
}

eventhandler_tag
eventhandler_register(struct eventhandler_list *list, const char *name, 
		      void *func, void *arg, int priority)
{
    struct eventhandler_entry_generic	*eg;
    
    /* allocate an entry for this handler, populate it */
    eg = malloc(sizeof(struct eventhandler_entry_generic), M_EVENTHANDLER,
	M_WAITOK | M_ZERO);
    eg->func = func;
    eg->ee.ee_arg = arg;
    eg->ee.ee_priority = priority;

return (eventhandler_register_internal(list, name, &eg->ee));
}

#ifdef VIMAGE
struct eventhandler_entry_generic_vimage
{
    struct eventhandler_entry		ee;
    vimage_iterator_func_t		func;		/* Vimage iterator function. */
    struct eventhandler_entry_vimage	v_ee;		/* Original func, arg. */
};

eventhandler_tag
vimage_eventhandler_register(struct eventhandler_list *list, const char *name, 
    void *func, void *arg, int priority, vimage_iterator_func_t iterfunc)
{
    struct eventhandler_entry_generic_vimage	*eg;
    
    /* allocate an entry for this handler, populate it */
    eg = malloc(sizeof(struct eventhandler_entry_generic_vimage),
	M_EVENTHANDLER, M_WAITOK | M_ZERO);
    eg->func = iterfunc;
    eg->v_ee.func = func;
    eg->v_ee.ee_arg = arg;
    eg->ee.ee_arg = &eg->v_ee;
    eg->ee.ee_priority = priority;

return (eventhandler_register_internal(list, name, &eg->ee));
}
#endif

static void
_eventhandler_deregister(struct eventhandler_list *list, eventhandler_tag tag,
    bool wait)
{
    struct eventhandler_entry	*ep = tag;

EHL_LOCK_ASSERT(list, MA_OWNED);
    if (ep != NULL) {
	/* remove just this entry */
	if (list->el_runcount == 0) {
	    CTR3(KTR_EVH, "%s: removing item %p from \"%s\"", __func__, ep,
		list->el_name);
	    TAILQ_REMOVE(&list->el_entries, ep, ee_link);
	    free(ep, M_EVENTHANDLER);
	} else {
	    CTR3(KTR_EVH, "%s: marking item %p from \"%s\" as dead", __func__,
		ep, list->el_name);
	    ep->ee_priority = EHE_DEAD_PRIORITY;
	}
    } else {
	/* remove entire list */
	if (list->el_runcount == 0) {
	    CTR2(KTR_EVH, "%s: removing all items from \"%s\"", __func__,
		list->el_name);
	    while (!TAILQ_EMPTY(&list->el_entries)) {
		ep = TAILQ_FIRST(&list->el_entries);
		TAILQ_REMOVE(&list->el_entries, ep, ee_link);
		free(ep, M_EVENTHANDLER);
	    }
	} else {
	    CTR2(KTR_EVH, "%s: marking all items from \"%s\" as dead",
		__func__, list->el_name);
	    TAILQ_FOREACH(ep, &list->el_entries, ee_link)
		ep->ee_priority = EHE_DEAD_PRIORITY;
	}
    }
    while (wait && list->el_runcount > 0)
	    mtx_sleep(list, &list->el_lock, 0, "evhrm", 0);
    EHL_UNLOCK(list);
}

void
eventhandler_deregister(struct eventhandler_list *list, eventhandler_tag tag)
{

_eventhandler_deregister(list, tag, true);
}

void
eventhandler_deregister_nowait(struct eventhandler_list *list,
    eventhandler_tag tag)
{

_eventhandler_deregister(list, tag, false);
}

/*
 * Internal version for use when eventhandler list is already locked.
 */
static struct eventhandler_list *
_eventhandler_find_list(const char *name)
{
    struct eventhandler_list	*list;

mtx_assert(&eventhandler_mutex, MA_OWNED);
    TAILQ_FOREACH(list, &eventhandler_lists, el_link) {
	if (!strcmp(name, list->el_name))
	    break;
    }
    return (list);
}

/*
 * Lookup a "slow" list by name.  Returns with the list locked.
 */
struct eventhandler_list *
eventhandler_find_list(const char *name)
{
    struct eventhandler_list	*list;

if (!eventhandler_lists_initted)
	return(NULL);
    
    /* scan looking for the requested list */
    mtx_lock(&eventhandler_mutex);
    list = _eventhandler_find_list(name);
    if (list != NULL)
	EHL_LOCK(list);
    mtx_unlock(&eventhandler_mutex);
    
    return(list);
}

/*
 * Prune "dead" entries from an eventhandler list.
 */
void
eventhandler_prune_list(struct eventhandler_list *list)
{
    struct eventhandler_entry *ep, *en;
    int pruned = 0;

CTR2(KTR_EVH, "%s: pruning list \"%s\"", __func__, list->el_name);
    EHL_LOCK_ASSERT(list, MA_OWNED);
    TAILQ_FOREACH_SAFE(ep, &list->el_entries, ee_link, en) {
	if (ep->ee_priority == EHE_DEAD_PRIORITY) {
	    TAILQ_REMOVE(&list->el_entries, ep, ee_link);
	    free(ep, M_EVENTHANDLER);
	    pruned++;
	}
    }
    if (pruned > 0)
	    wakeup(list);
}

/*
 * Create (or get the existing) list so the pointer can be stored by
 * EVENTHANDLER_LIST_DEFINE.
 */
struct eventhandler_list *
eventhandler_create_list(const char *name)
{
	struct eventhandler_list *list;

KASSERT(eventhandler_lists_initted,
	    ("eventhandler list created too early"));

mtx_lock(&eventhandler_mutex);
	list = eventhandler_find_or_create_list(name);
	mtx_unlock(&eventhandler_mutex);

return (list);
}

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Editing: subr_eventhandler.c

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