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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: vfs_acl.c

/*-
 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
 *
 * Copyright (c) 1999-2006, 2016-2017 Robert N. M. Watson
 * All rights reserved.
 *
 * This software was developed by Robert Watson for the TrustedBSD Project.
 *
 * Portions of this software were developed by BAE Systems, the University of
 * Cambridge Computer Laboratory, and Memorial University under DARPA/AFRL
 * contract FA8650-15-C-7558 ("CADETS"), as part of the DARPA Transparent
 * Computing (TC) research program.
 *
 * 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.
 */
/*
 * Developed by the TrustedBSD Project.
 *
 * ACL system calls and other functions common across different ACL types.
 * Type-specific routines go into subr_acl_<type>.c.
 */

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

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/sysproto.h>
#include <sys/capsicum.h>
#include <sys/fcntl.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/mount.h>
#include <sys/vnode.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/namei.h>
#include <sys/file.h>
#include <sys/filedesc.h>
#include <sys/proc.h>
#include <sys/sysent.h>
#include <sys/acl.h>

#include <security/audit/audit.h>
#include <security/mac/mac_framework.h>

CTASSERT(ACL_MAX_ENTRIES >= OLDACL_MAX_ENTRIES);

MALLOC_DEFINE(M_ACL, "acl", "Access Control Lists");

static int	kern___acl_aclcheck_path(struct thread *td, const char *path,
		    acl_type_t type, struct acl *aclp, int follow);
static int	kern___acl_delete_path(struct thread *td, const char *path,
		    acl_type_t type, int follow);
static int	kern___acl_get_path(struct thread *td, const char *path,
		    acl_type_t type, struct acl *aclp, int follow);
static int	kern___acl_set_path(struct thread *td, const char *path,
		    acl_type_t type, const struct acl *aclp, int follow);
static int	vacl_set_acl(struct thread *td, struct vnode *vp,
		    acl_type_t type, const struct acl *aclp);
static int	vacl_get_acl(struct thread *td, struct vnode *vp,
		    acl_type_t type, struct acl *aclp);
static int	vacl_aclcheck(struct thread *td, struct vnode *vp,
		    acl_type_t type, const struct acl *aclp);

int
acl_copy_oldacl_into_acl(const struct oldacl *source, struct acl *dest)
{
	int i;

if (source->acl_cnt < 0 || source->acl_cnt > OLDACL_MAX_ENTRIES)
		return (EINVAL);

bzero(dest, sizeof(*dest));

dest->acl_cnt = source->acl_cnt;
	dest->acl_maxcnt = ACL_MAX_ENTRIES;

for (i = 0; i < dest->acl_cnt; i++) {
		dest->acl_entry[i].ae_tag = source->acl_entry[i].ae_tag;
		dest->acl_entry[i].ae_id = source->acl_entry[i].ae_id;
		dest->acl_entry[i].ae_perm = source->acl_entry[i].ae_perm;
	}

return (0);
}

int
acl_copy_acl_into_oldacl(const struct acl *source, struct oldacl *dest)
{
	int i;

if (source->acl_cnt > OLDACL_MAX_ENTRIES)
		return (EINVAL);

bzero(dest, sizeof(*dest));

dest->acl_cnt = source->acl_cnt;

return (0);
}

/*
 * At one time, "struct ACL" was extended in order to add support for NFSv4
 * ACLs.  Instead of creating compatibility versions of all the ACL-related
 * syscalls, they were left intact.  It's possible to find out what the code
 * calling these syscalls (libc) expects basing on "type" argument - if it's
 * either ACL_TYPE_ACCESS_OLD or ACL_TYPE_DEFAULT_OLD (which previously were
 * known as ACL_TYPE_ACCESS and ACL_TYPE_DEFAULT), then it's the "struct
 * oldacl".  If it's something else, then it's the new "struct acl".  In the
 * latter case, the routines below just copyin/copyout the contents.  In the
 * former case, they copyin the "struct oldacl" and convert it to the new
 * format.
 */
static int
acl_copyin(const void *user_acl, struct acl *kernel_acl, acl_type_t type)
{
	int error;
	struct oldacl old;

switch (type) {
	case ACL_TYPE_ACCESS_OLD:
	case ACL_TYPE_DEFAULT_OLD:
		error = copyin(user_acl, &old, sizeof(old));
		if (error != 0)
			break;
		acl_copy_oldacl_into_acl(&old, kernel_acl);
		break;

default:
		error = copyin(user_acl, kernel_acl, sizeof(*kernel_acl));
		if (kernel_acl->acl_maxcnt != ACL_MAX_ENTRIES)
			return (EINVAL);
	}

return (error);
}

static int
acl_copyout(const struct acl *kernel_acl, void *user_acl, acl_type_t type)
{
	uint32_t am;
	int error;
	struct oldacl old;

switch (type) {
	case ACL_TYPE_ACCESS_OLD:
	case ACL_TYPE_DEFAULT_OLD:
		error = acl_copy_acl_into_oldacl(kernel_acl, &old);
		if (error != 0)
			break;

error = copyout(&old, user_acl, sizeof(old));
		break;

default:
		error = fueword32((char *)user_acl +
		    offsetof(struct acl, acl_maxcnt), &am);
		if (error == -1)
			return (EFAULT);
		if (am != ACL_MAX_ENTRIES)
			return (EINVAL);

error = copyout(kernel_acl, user_acl, sizeof(*kernel_acl));
	}

return (error);
}

/*
 * Convert "old" type - ACL_TYPE_{ACCESS,DEFAULT}_OLD - into its "new"
 * counterpart.  It's required for old (pre-NFSv4 ACLs) libc to work
 * with new kernel.  Fixing 'type' for old binaries with new libc
 * is being done in lib/libc/posix1e/acl_support.c:_acl_type_unold().
 */
static int
acl_type_unold(int type)
{
	switch (type) {
	case ACL_TYPE_ACCESS_OLD:
		return (ACL_TYPE_ACCESS);

case ACL_TYPE_DEFAULT_OLD:
		return (ACL_TYPE_DEFAULT);

default:
		return (type);
	}
}

/*
 * These calls wrap the real vnode operations, and are called by the syscall
 * code once the syscall has converted the path or file descriptor to a vnode
 * (unlocked).  The aclp pointer is assumed still to point to userland, so
 * this should not be consumed within the kernel except by syscall code.
 * Other code should directly invoke VOP_{SET,GET}ACL.
 */

/*
 * Given a vnode, set its ACL.
 */
static int
vacl_set_acl(struct thread *td, struct vnode *vp, acl_type_t type,
    const struct acl *aclp)
{
	struct acl *inkernelacl;
	struct mount *mp;
	int error;

AUDIT_ARG_VALUE(type);
	inkernelacl = acl_alloc(M_WAITOK);
	error = acl_copyin(aclp, inkernelacl, type);
	if (error != 0)
		goto out;
	error = vn_start_write(vp, &mp, V_WAIT | PCATCH);
	if (error != 0)
		goto out;
	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
	AUDIT_ARG_VNODE1(vp);
#ifdef MAC
	error = mac_vnode_check_setacl(td->td_ucred, vp, type, inkernelacl);
	if (error != 0)
		goto out_unlock;
#endif
	error = VOP_SETACL(vp, acl_type_unold(type), inkernelacl,
	    td->td_ucred, td);
#ifdef MAC
out_unlock:
#endif
	VOP_UNLOCK(vp);
	vn_finished_write(mp);
out:
	acl_free(inkernelacl);
	return (error);
}

/*
 * Given a vnode, get its ACL.
 */
static int
vacl_get_acl(struct thread *td, struct vnode *vp, acl_type_t type,
    struct acl *aclp)
{
	struct acl *inkernelacl;
	int error;

AUDIT_ARG_VALUE(type);
	inkernelacl = acl_alloc(M_WAITOK | M_ZERO);
	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
	AUDIT_ARG_VNODE1(vp);
#ifdef MAC
	error = mac_vnode_check_getacl(td->td_ucred, vp, type);
	if (error != 0)
		goto out;
#endif
	error = VOP_GETACL(vp, acl_type_unold(type), inkernelacl,
	    td->td_ucred, td);

#ifdef MAC
out:
#endif
	VOP_UNLOCK(vp);
	if (error == 0)
		error = acl_copyout(inkernelacl, aclp, type);
	acl_free(inkernelacl);
	return (error);
}

/*
 * Given a vnode, delete its ACL.
 */
static int
vacl_delete(struct thread *td, struct vnode *vp, acl_type_t type)
{
	struct mount *mp;
	int error;

AUDIT_ARG_VALUE(type);
	error = vn_start_write(vp, &mp, V_WAIT | PCATCH);
	if (error != 0)
		return (error);
	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
	AUDIT_ARG_VNODE1(vp);
#ifdef MAC
	error = mac_vnode_check_deleteacl(td->td_ucred, vp, type);
	if (error != 0)
		goto out;
#endif
	error = VOP_SETACL(vp, acl_type_unold(type), 0, td->td_ucred, td);
#ifdef MAC
out:
#endif
	VOP_UNLOCK(vp);
	vn_finished_write(mp);
	return (error);
}

/*
 * Given a vnode, check whether an ACL is appropriate for it
 *
 * XXXRW: No vnode lock held so can't audit vnode state...?
 */
static int
vacl_aclcheck(struct thread *td, struct vnode *vp, acl_type_t type,
    const struct acl *aclp)
{
	struct acl *inkernelacl;
	int error;

inkernelacl = acl_alloc(M_WAITOK);
	error = acl_copyin(aclp, inkernelacl, type);
	if (error != 0)
		goto out;
	error = VOP_ACLCHECK(vp, acl_type_unold(type), inkernelacl,
	    td->td_ucred, td);
out:
	acl_free(inkernelacl);
	return (error);
}

/*
 * syscalls -- convert the path/fd to a vnode, and call vacl_whatever.  Don't
 * need to lock, as the vacl_ code will get/release any locks required.
 */

/*
 * Given a file path, get an ACL for it
 */
int
sys___acl_get_file(struct thread *td, struct __acl_get_file_args *uap)
{

return (kern___acl_get_path(td, uap->path, uap->type, uap->aclp,
	    FOLLOW));
}

/*
 * Given a file path, get an ACL for it; don't follow links.
 */
int
sys___acl_get_link(struct thread *td, struct __acl_get_link_args *uap)
{

return(kern___acl_get_path(td, uap->path, uap->type, uap->aclp,
	    NOFOLLOW));
}

static int
kern___acl_get_path(struct thread *td, const char *path, acl_type_t type,
    struct acl *aclp, int follow)
{
	struct nameidata nd;
	int error;

NDINIT(&nd, LOOKUP, follow | AUDITVNODE1, UIO_USERSPACE, path, td);
	error = namei(&nd);
	if (error == 0) {
		error = vacl_get_acl(td, nd.ni_vp, type, aclp);
		NDFREE(&nd, 0);
	}
	return (error);
}

/*
 * Given a file path, set an ACL for it.
 */
int
sys___acl_set_file(struct thread *td, struct __acl_set_file_args *uap)
{

return(kern___acl_set_path(td, uap->path, uap->type, uap->aclp,
	    FOLLOW));
}

/*
 * Given a file path, set an ACL for it; don't follow links.
 */
int
sys___acl_set_link(struct thread *td, struct __acl_set_link_args *uap)
{

return(kern___acl_set_path(td, uap->path, uap->type, uap->aclp,
	    NOFOLLOW));
}

static int
kern___acl_set_path(struct thread *td, const char *path,
    acl_type_t type, const struct acl *aclp, int follow)
{
	struct nameidata nd;
	int error;

NDINIT(&nd, LOOKUP, follow | AUDITVNODE1, UIO_USERSPACE, path, td);
	error = namei(&nd);
	if (error == 0) {
		error = vacl_set_acl(td, nd.ni_vp, type, aclp);
		NDFREE(&nd, 0);
	}
	return (error);
}

/*
 * Given a file descriptor, get an ACL for it.
 */
int
sys___acl_get_fd(struct thread *td, struct __acl_get_fd_args *uap)
{
	struct file *fp;
	cap_rights_t rights;
	int error;

AUDIT_ARG_FD(uap->filedes);
	error = getvnode(td, uap->filedes,
	    cap_rights_init_one(&rights, CAP_ACL_GET), &fp);
	if (error == 0) {
		error = vacl_get_acl(td, fp->f_vnode, uap->type, uap->aclp);
		fdrop(fp, td);
	}
	return (error);
}

/*
 * Given a file descriptor, set an ACL for it.
 */
int
sys___acl_set_fd(struct thread *td, struct __acl_set_fd_args *uap)
{
	struct file *fp;
	cap_rights_t rights;
	int error;

AUDIT_ARG_FD(uap->filedes);
	error = getvnode(td, uap->filedes,
	    cap_rights_init_one(&rights, CAP_ACL_SET), &fp);
	if (error == 0) {
		error = vacl_set_acl(td, fp->f_vnode, uap->type, uap->aclp);
		fdrop(fp, td);
	}
	return (error);
}

/*
 * Given a file path, delete an ACL from it.
 */
int
sys___acl_delete_file(struct thread *td, struct __acl_delete_file_args *uap)
{

return (kern___acl_delete_path(td, uap->path, uap->type, FOLLOW));
}

/*
 * Given a file path, delete an ACL from it; don't follow links.
 */
int
sys___acl_delete_link(struct thread *td, struct __acl_delete_link_args *uap)
{

return (kern___acl_delete_path(td, uap->path, uap->type, NOFOLLOW));
}

static int
kern___acl_delete_path(struct thread *td, const char *path,
    acl_type_t type, int follow)
{
	struct nameidata nd;
	int error;

NDINIT(&nd, LOOKUP, follow, UIO_USERSPACE, path, td);
	error = namei(&nd);
	if (error == 0) {
		error = vacl_delete(td, nd.ni_vp, type);
		NDFREE(&nd, 0);
	}
	return (error);
}

/*
 * Given a file path, delete an ACL from it.
 */
int
sys___acl_delete_fd(struct thread *td, struct __acl_delete_fd_args *uap)
{
	struct file *fp;
	cap_rights_t rights;
	int error;

AUDIT_ARG_FD(uap->filedes);
	error = getvnode(td, uap->filedes,
	    cap_rights_init_one(&rights, CAP_ACL_DELETE), &fp);
	if (error == 0) {
		error = vacl_delete(td, fp->f_vnode, uap->type);
		fdrop(fp, td);
	}
	return (error);
}

/*
 * Given a file path, check an ACL for it.
 */
int
sys___acl_aclcheck_file(struct thread *td, struct __acl_aclcheck_file_args *uap)
{

return (kern___acl_aclcheck_path(td, uap->path, uap->type, uap->aclp,
	    FOLLOW));
}

/*
 * Given a file path, check an ACL for it; don't follow links.
 */
int
sys___acl_aclcheck_link(struct thread *td, struct __acl_aclcheck_link_args *uap)
{
	return (kern___acl_aclcheck_path(td, uap->path, uap->type, uap->aclp,
	    NOFOLLOW));
}

static int
kern___acl_aclcheck_path(struct thread *td, const char *path, acl_type_t type,
    struct acl *aclp, int follow)
{
	struct nameidata nd;
	int error;

NDINIT(&nd, LOOKUP, follow, UIO_USERSPACE, path, td);
	error = namei(&nd);
	if (error == 0) {
		error = vacl_aclcheck(td, nd.ni_vp, type, aclp);
		NDFREE(&nd, 0);
	}
	return (error);
}

/*
 * Given a file descriptor, check an ACL for it.
 */
int
sys___acl_aclcheck_fd(struct thread *td, struct __acl_aclcheck_fd_args *uap)
{
	struct file *fp;
	cap_rights_t rights;
	int error;

AUDIT_ARG_FD(uap->filedes);
	error = getvnode(td, uap->filedes,
	    cap_rights_init_one(&rights, CAP_ACL_CHECK), &fp);
	if (error == 0) {
		error = vacl_aclcheck(td, fp->f_vnode, uap->type, uap->aclp);
		fdrop(fp, td);
	}
	return (error);
}

struct acl *
acl_alloc(int flags)
{
	struct acl *aclp;

aclp = malloc(sizeof(*aclp), M_ACL, flags);
	if (aclp == NULL)
		return (NULL);

aclp->acl_maxcnt = ACL_MAX_ENTRIES;

return (aclp);
}

void
acl_free(struct acl *aclp)
{

free(aclp, M_ACL);
}

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