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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: kern_khelp.c

/*-
 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
 *
 * Copyright (c) 2010,2013 Lawrence Stewart <lstewart@freebsd.org>
 * Copyright (c) 2010 The FreeBSD Foundation
 * All rights reserved.
 *
 * This software was developed by Lawrence Stewart while studying at the Centre
 * for Advanced Internet Architectures, Swinburne University of Technology,
 * made possible in part by grants from the FreeBSD Foundation and Cisco
 * University Research Program Fund at Community Foundation Silicon Valley.
 *
 * Portions of this software were developed at the Centre for Advanced
 * Internet Architectures, Swinburne University of Technology, Melbourne,
 * Australia by Lawrence Stewart under sponsorship from the FreeBSD Foundation.
 *
 * 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/hhook.h>
#include <sys/khelp.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/module_khelp.h>
#include <sys/osd.h>
#include <sys/queue.h>
#include <sys/refcount.h>
#include <sys/rwlock.h>
#include <sys/systm.h>

static struct rwlock khelp_list_lock;
RW_SYSINIT(khelplistlock, &khelp_list_lock, "helper list lock");

static TAILQ_HEAD(helper_head, helper) helpers = TAILQ_HEAD_INITIALIZER(helpers);

/* Private function prototypes. */
static inline void khelp_remove_osd(struct helper *h, struct osd *hosd);
void khelp_new_hhook_registered(struct hhook_head *hhh, uint32_t flags);

#define	KHELP_LIST_WLOCK() rw_wlock(&khelp_list_lock)
#define	KHELP_LIST_WUNLOCK() rw_wunlock(&khelp_list_lock)
#define	KHELP_LIST_RLOCK() rw_rlock(&khelp_list_lock)
#define	KHELP_LIST_RUNLOCK() rw_runlock(&khelp_list_lock)
#define	KHELP_LIST_LOCK_ASSERT() rw_assert(&khelp_list_lock, RA_LOCKED)

int
khelp_register_helper(struct helper *h)
{
	struct helper *tmph;
	int error, i, inserted;

error = inserted = 0;
	refcount_init(&h->h_refcount, 0);
	h->h_id = osd_register(OSD_KHELP, NULL, NULL);

/* It's only safe to add the hooks after osd_register(). */
	for (i = 0; i < h->h_nhooks && !error; i++) {
		/* We don't require the module to assign hook_helper. */
		h->h_hooks[i].hook_helper = h;
		error = hhook_add_hook_lookup(&h->h_hooks[i], HHOOK_WAITOK);
		if (error)
			printf("%s: \"%s\" khelp module unable to "
			    "hook type %d id %d due to error %d\n", __func__,
			    h->h_name, h->h_hooks[i].hook_type,
			    h->h_hooks[i].hook_id, error);
	}

if (error) {
		for (i--; i >= 0; i--)
			hhook_remove_hook_lookup(&h->h_hooks[i]);
		osd_deregister(OSD_KHELP, h->h_id);
	} else {
		KHELP_LIST_WLOCK();
		/*
		 * Keep list of helpers sorted in descending h_id order. Due to
		 * the way osd_set() works, a sorted list ensures
		 * khelp_init_osd() will operate with improved efficiency.
		 */
		TAILQ_FOREACH(tmph, &helpers, h_next) {
			if (tmph->h_id < h->h_id) {
				TAILQ_INSERT_BEFORE(tmph, h, h_next);
				inserted = 1;
				break;
			}
		}

if (!inserted)
			TAILQ_INSERT_TAIL(&helpers, h, h_next);
		KHELP_LIST_WUNLOCK();
	}

return (error);
}

int
khelp_deregister_helper(struct helper *h)
{
	struct helper *tmph;
	int error, i;

KHELP_LIST_WLOCK();
	if (h->h_refcount > 0)
		error = EBUSY;
	else {
		error = ENOENT;
		TAILQ_FOREACH(tmph, &helpers, h_next) {
			if (tmph == h) {
				TAILQ_REMOVE(&helpers, h, h_next);
				error = 0;
				break;
			}
		}
	}
	KHELP_LIST_WUNLOCK();

if (!error) {
		for (i = 0; i < h->h_nhooks; i++)
			hhook_remove_hook_lookup(&h->h_hooks[i]);
		osd_deregister(OSD_KHELP, h->h_id);
	}

return (error);
}

int
khelp_init_osd(uint32_t classes, struct osd *hosd)
{
	struct helper *h;
	void *hdata;
	int error;

KASSERT(hosd != NULL, ("struct osd not initialised!"));

error = 0;

KHELP_LIST_RLOCK();
	TAILQ_FOREACH(h, &helpers, h_next) {
		/* If helper is correct class and needs to store OSD... */
		if (h->h_classes & classes && h->h_flags & HELPER_NEEDS_OSD) {
			hdata = uma_zalloc(h->h_zone, M_NOWAIT);
			if (hdata == NULL) {
				error = ENOMEM;
				break;
			}
			osd_set(OSD_KHELP, hosd, h->h_id, hdata);
			refcount_acquire(&h->h_refcount);
		}
	}

if (error) {
		/* Delete OSD that was assigned prior to the error. */
		TAILQ_FOREACH(h, &helpers, h_next) {
			if (h->h_classes & classes)
				khelp_remove_osd(h, hosd);
		}
	}
	KHELP_LIST_RUNLOCK();

return (error);
}

int
khelp_destroy_osd(struct osd *hosd)
{
	struct helper *h;
	int error;

KASSERT(hosd != NULL, ("struct osd not initialised!"));

error = 0;

KHELP_LIST_RLOCK();
	/*
	 * Clean up all khelp related OSD.
	 *
	 * XXXLAS: Would be nice to use something like osd_exit() here but it
	 * doesn't have the right semantics for this purpose.
	 */
	TAILQ_FOREACH(h, &helpers, h_next)
		khelp_remove_osd(h, hosd);
	KHELP_LIST_RUNLOCK();

return (error);
}

static inline void
khelp_remove_osd(struct helper *h, struct osd *hosd)
{
	void *hdata;

if (h->h_flags & HELPER_NEEDS_OSD) {
		/*
		 * If the current helper uses OSD and calling osd_get()
		 * on the helper's h_id returns non-NULL, the helper has
		 * OSD attached to 'hosd' which needs to be cleaned up.
		 */
		hdata = osd_get(OSD_KHELP, hosd, h->h_id);
		if (hdata != NULL) {
			uma_zfree(h->h_zone, hdata);
			osd_del(OSD_KHELP, hosd, h->h_id);
			refcount_release(&h->h_refcount);
		}
	}
}

void *
khelp_get_osd(struct osd *hosd, int32_t id)
{

return (osd_get(OSD_KHELP, hosd, id));
}

int32_t
khelp_get_id(char *hname)
{
	struct helper *h;
	int32_t id;

id = -1;

KHELP_LIST_RLOCK();
	TAILQ_FOREACH(h, &helpers, h_next) {
		if (strncmp(h->h_name, hname, HELPER_NAME_MAXLEN) == 0) {
			id = h->h_id;
			break;
		}
	}
	KHELP_LIST_RUNLOCK();

return (id);
}

int
khelp_add_hhook(struct hookinfo *hki, uint32_t flags)
{
	int error;

/*
	 * XXXLAS: Should probably include the functionality to update the
	 * helper's h_hooks struct member.
	 */
	error = hhook_add_hook_lookup(hki, flags);

return (error);
}

int
khelp_remove_hhook(struct hookinfo *hki)
{
	int error;

/*
	 * XXXLAS: Should probably include the functionality to update the
	 * helper's h_hooks struct member.
	 */
	error = hhook_remove_hook_lookup(hki);

return (error);
}

/*
 * Private KPI between hhook and khelp that allows khelp modules to insert hook
 * functions into hhook points which register after the modules were loaded.
 */
void
khelp_new_hhook_registered(struct hhook_head *hhh, uint32_t flags)
{
	struct helper *h;
	int error, i;

KHELP_LIST_RLOCK();
	TAILQ_FOREACH(h, &helpers, h_next) {
		for (i = 0; i < h->h_nhooks; i++) {
			if (hhh->hhh_type != h->h_hooks[i].hook_type ||
			    hhh->hhh_id != h->h_hooks[i].hook_id)
				continue;
			error = hhook_add_hook(hhh, &h->h_hooks[i], flags);
			if (error) {
				printf("%s: \"%s\" khelp module unable to "
				    "hook type %d id %d due to error %d\n",
				    __func__, h->h_name,
				    h->h_hooks[i].hook_type,
				    h->h_hooks[i].hook_id, error);
				error = 0;
			}
		}
	}
	KHELP_LIST_RUNLOCK();
}

int
khelp_modevent(module_t mod, int event_type, void *data)
{
	struct khelp_modevent_data *kmd;
	int error;

kmd = (struct khelp_modevent_data *)data;
	error = 0;

switch(event_type) {
	case MOD_LOAD:
		if (kmd->helper->h_flags & HELPER_NEEDS_OSD) {
			if (kmd->uma_zsize <= 0) {
				printf("Use KHELP_DECLARE_MOD_UMA() instead!\n");
				error = EDOOFUS;
				break;
			}
			kmd->helper->h_zone = uma_zcreate(kmd->name,
			    kmd->uma_zsize, kmd->umactor, kmd->umadtor, NULL,
			    NULL, 0, 0);
			if (kmd->helper->h_zone == NULL) {
				error = ENOMEM;
				break;
			}
		}
		strlcpy(kmd->helper->h_name, kmd->name, HELPER_NAME_MAXLEN);
		kmd->helper->h_hooks = kmd->hooks;
		kmd->helper->h_nhooks = kmd->nhooks;
		if (kmd->helper->mod_init != NULL)
			error = kmd->helper->mod_init();
		if (!error)
			error = khelp_register_helper(kmd->helper);
		break;

case MOD_QUIESCE:
	case MOD_SHUTDOWN:
	case MOD_UNLOAD:
		error = khelp_deregister_helper(kmd->helper);
		if (!error) {
			if (kmd->helper->h_flags & HELPER_NEEDS_OSD)
				uma_zdestroy(kmd->helper->h_zone);
			if (kmd->helper->mod_destroy != NULL)
				kmd->helper->mod_destroy();
		} else if (error == ENOENT)
			/* Do nothing and allow unload if helper not in list. */
			error = 0;
		else if (error == EBUSY)
			printf("Khelp module \"%s\" can't unload until its "
			    "refcount drops from %d to 0.\n", kmd->name,
			    kmd->helper->h_refcount);
		break;

default:
		error = EINVAL;
		break;
	}

return (error);
}

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Editing: kern_khelp.c

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