| Current Path : /usr/src/sys/security/mac/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //usr/src/sys/security/mac/mac_vfs.c |
/*-
* Copyright (c) 1999-2002, 2009 Robert N. M. Watson
* Copyright (c) 2001 Ilmar S. Habibulin
* Copyright (c) 2001-2005 McAfee, Inc.
* Copyright (c) 2005-2006 SPARTA, Inc.
* Copyright (c) 2008 Apple Inc.
* All rights reserved.
*
* This software was developed by Robert Watson and Ilmar Habibulin for the
* TrustedBSD Project.
*
* This software was developed for the FreeBSD Project in part by McAfee
* Research, the Security Research Division of McAfee, Inc. under
* DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA
* CHATS research program.
*
* This software was enhanced by SPARTA ISSO under SPAWAR contract
* N66001-04-C-6019 ("SEFOS").
*
* This software was developed at the University of Cambridge Computer
* Laboratory with support from a grant from Google, Inc.
*
* 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: release/9.1.0/sys/security/mac/mac_vfs.c 214249 2010-10-23 16:59:39Z rwatson $");
#include "opt_kdtrace.h"
#include "opt_mac.h"
#include <sys/param.h>
#include <sys/condvar.h>
#include <sys/extattr.h>
#include <sys/imgact.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mutex.h>
#include <sys/proc.h>
#include <sys/sbuf.h>
#include <sys/systm.h>
#include <sys/vnode.h>
#include <sys/mount.h>
#include <sys/file.h>
#include <sys/namei.h>
#include <sys/sdt.h>
#include <sys/sysctl.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <vm/vm_map.h>
#include <vm/vm_object.h>
#include <fs/devfs/devfs.h>
#include <security/mac/mac_framework.h>
#include <security/mac/mac_internal.h>
#include <security/mac/mac_policy.h>
/*
* Warn about EA transactions only the first time they happen. No locking on
* this variable.
*/
static int ea_warn_once = 0;
static int mac_vnode_setlabel_extattr(struct ucred *cred,
struct vnode *vp, struct label *intlabel);
static struct label *
mac_devfs_label_alloc(void)
{
struct label *label;
label = mac_labelzone_alloc(M_WAITOK);
MAC_POLICY_PERFORM(devfs_init_label, label);
return (label);
}
void
mac_devfs_init(struct devfs_dirent *de)
{
if (mac_labeled & MPC_OBJECT_DEVFS)
de->de_label = mac_devfs_label_alloc();
else
de->de_label = NULL;
}
static struct label *
mac_mount_label_alloc(void)
{
struct label *label;
label = mac_labelzone_alloc(M_WAITOK);
MAC_POLICY_PERFORM(mount_init_label, label);
return (label);
}
void
mac_mount_init(struct mount *mp)
{
if (mac_labeled & MPC_OBJECT_MOUNT)
mp->mnt_label = mac_mount_label_alloc();
else
mp->mnt_label = NULL;
}
struct label *
mac_vnode_label_alloc(void)
{
struct label *label;
label = mac_labelzone_alloc(M_WAITOK);
MAC_POLICY_PERFORM(vnode_init_label, label);
return (label);
}
void
mac_vnode_init(struct vnode *vp)
{
if (mac_labeled & MPC_OBJECT_VNODE)
vp->v_label = mac_vnode_label_alloc();
else
vp->v_label = NULL;
}
static void
mac_devfs_label_free(struct label *label)
{
MAC_POLICY_PERFORM_NOSLEEP(devfs_destroy_label, label);
mac_labelzone_free(label);
}
void
mac_devfs_destroy(struct devfs_dirent *de)
{
if (de->de_label != NULL) {
mac_devfs_label_free(de->de_label);
de->de_label = NULL;
}
}
static void
mac_mount_label_free(struct label *label)
{
MAC_POLICY_PERFORM_NOSLEEP(mount_destroy_label, label);
mac_labelzone_free(label);
}
void
mac_mount_destroy(struct mount *mp)
{
if (mp->mnt_label != NULL) {
mac_mount_label_free(mp->mnt_label);
mp->mnt_label = NULL;
}
}
void
mac_vnode_label_free(struct label *label)
{
MAC_POLICY_PERFORM_NOSLEEP(vnode_destroy_label, label);
mac_labelzone_free(label);
}
void
mac_vnode_destroy(struct vnode *vp)
{
if (vp->v_label != NULL) {
mac_vnode_label_free(vp->v_label);
vp->v_label = NULL;
}
}
void
mac_vnode_copy_label(struct label *src, struct label *dest)
{
MAC_POLICY_PERFORM_NOSLEEP(vnode_copy_label, src, dest);
}
int
mac_vnode_externalize_label(struct label *label, char *elements,
char *outbuf, size_t outbuflen)
{
int error;
MAC_POLICY_EXTERNALIZE(vnode, label, elements, outbuf, outbuflen);
return (error);
}
int
mac_vnode_internalize_label(struct label *label, char *string)
{
int error;
MAC_POLICY_INTERNALIZE(vnode, label, string);
return (error);
}
void
mac_devfs_update(struct mount *mp, struct devfs_dirent *de, struct vnode *vp)
{
MAC_POLICY_PERFORM_NOSLEEP(devfs_update, mp, de, de->de_label, vp,
vp->v_label);
}
void
mac_devfs_vnode_associate(struct mount *mp, struct devfs_dirent *de,
struct vnode *vp)
{
MAC_POLICY_PERFORM_NOSLEEP(devfs_vnode_associate, mp, mp->mnt_label,
de, de->de_label, vp, vp->v_label);
}
int
mac_vnode_associate_extattr(struct mount *mp, struct vnode *vp)
{
int error;
ASSERT_VOP_LOCKED(vp, "mac_vnode_associate_extattr");
MAC_POLICY_CHECK(vnode_associate_extattr, mp, mp->mnt_label, vp,
vp->v_label);
return (error);
}
void
mac_vnode_associate_singlelabel(struct mount *mp, struct vnode *vp)
{
MAC_POLICY_PERFORM_NOSLEEP(vnode_associate_singlelabel, mp,
mp->mnt_label, vp, vp->v_label);
}
/*
* Functions implementing extended-attribute backed labels for file systems
* that support it.
*
* Where possible, we use EA transactions to make writes to multiple
* attributes across difference policies mutually atomic. We allow work to
* continue on file systems not supporting EA transactions, but generate a
* printf warning.
*/
int
mac_vnode_create_extattr(struct ucred *cred, struct mount *mp,
struct vnode *dvp, struct vnode *vp, struct componentname *cnp)
{
int error;
ASSERT_VOP_LOCKED(dvp, "mac_vnode_create_extattr");
ASSERT_VOP_LOCKED(vp, "mac_vnode_create_extattr");
error = VOP_OPENEXTATTR(vp, cred, curthread);
if (error == EOPNOTSUPP) {
if (ea_warn_once == 0) {
printf("Warning: transactions not supported "
"in EA write.\n");
ea_warn_once = 1;
}
} else if (error)
return (error);
MAC_POLICY_CHECK(vnode_create_extattr, cred, mp, mp->mnt_label, dvp,
dvp->v_label, vp, vp->v_label, cnp);
if (error) {
VOP_CLOSEEXTATTR(vp, 0, NOCRED, curthread);
return (error);
}
error = VOP_CLOSEEXTATTR(vp, 1, NOCRED, curthread);
if (error == EOPNOTSUPP)
error = 0;
return (error);
}
static int
mac_vnode_setlabel_extattr(struct ucred *cred, struct vnode *vp,
struct label *intlabel)
{
int error;
ASSERT_VOP_LOCKED(vp, "mac_vnode_setlabel_extattr");
error = VOP_OPENEXTATTR(vp, cred, curthread);
if (error == EOPNOTSUPP) {
if (ea_warn_once == 0) {
printf("Warning: transactions not supported "
"in EA write.\n");
ea_warn_once = 1;
}
} else if (error)
return (error);
MAC_POLICY_CHECK(vnode_setlabel_extattr, cred, vp, vp->v_label,
intlabel);
if (error) {
VOP_CLOSEEXTATTR(vp, 0, NOCRED, curthread);
return (error);
}
error = VOP_CLOSEEXTATTR(vp, 1, NOCRED, curthread);
if (error == EOPNOTSUPP)
error = 0;
return (error);
}
void
mac_vnode_execve_transition(struct ucred *old, struct ucred *new,
struct vnode *vp, struct label *interpvplabel, struct image_params *imgp)
{
ASSERT_VOP_LOCKED(vp, "mac_vnode_execve_transition");
MAC_POLICY_PERFORM(vnode_execve_transition, old, new, vp,
vp->v_label, interpvplabel, imgp, imgp->execlabel);
}
int
mac_vnode_execve_will_transition(struct ucred *old, struct vnode *vp,
struct label *interpvplabel, struct image_params *imgp)
{
int result;
ASSERT_VOP_LOCKED(vp, "mac_vnode_execve_will_transition");
result = 0;
/* No sleeping since the process lock will be held by the caller. */
MAC_POLICY_BOOLEAN_NOSLEEP(vnode_execve_will_transition, ||, old, vp,
vp->v_label, interpvplabel, imgp, imgp->execlabel);
return (result);
}
MAC_CHECK_PROBE_DEFINE3(vnode_check_access, "struct ucred *",
"struct vnode *", "accmode_t");
int
mac_vnode_check_access(struct ucred *cred, struct vnode *vp, accmode_t accmode)
{
int error;
ASSERT_VOP_LOCKED(vp, "mac_vnode_check_access");
MAC_POLICY_CHECK(vnode_check_access, cred, vp, vp->v_label, accmode);
MAC_CHECK_PROBE3(vnode_check_access, error, cred, vp, accmode);
return (error);
}
MAC_CHECK_PROBE_DEFINE2(vnode_check_chdir, "struct ucred *",
"struct vnode *");
int
mac_vnode_check_chdir(struct ucred *cred, struct vnode *dvp)
{
int error;
ASSERT_VOP_LOCKED(dvp, "mac_vnode_check_chdir");
MAC_POLICY_CHECK(vnode_check_chdir, cred, dvp, dvp->v_label);
MAC_CHECK_PROBE2(vnode_check_chdir, error, cred, dvp);
return (error);
}
MAC_CHECK_PROBE_DEFINE2(vnode_check_chroot, "struct ucred *",
"struct vnode *");
int
mac_vnode_check_chroot(struct ucred *cred, struct vnode *dvp)
{
int error;
ASSERT_VOP_LOCKED(dvp, "mac_vnode_check_chroot");
MAC_POLICY_CHECK(vnode_check_chroot, cred, dvp, dvp->v_label);
MAC_CHECK_PROBE2(vnode_check_chroot, error, cred, dvp);
return (error);
}
MAC_CHECK_PROBE_DEFINE4(vnode_check_create, "struct ucred *",
"struct vnode *", "struct componentname *", "struct vattr *");
int
mac_vnode_check_create(struct ucred *cred, struct vnode *dvp,
struct componentname *cnp, struct vattr *vap)
{
int error;
ASSERT_VOP_LOCKED(dvp, "mac_vnode_check_create");
MAC_POLICY_CHECK(vnode_check_create, cred, dvp, dvp->v_label, cnp,
vap);
MAC_CHECK_PROBE4(vnode_check_create, error, cred, dvp, cnp, vap);
return (error);
}
MAC_CHECK_PROBE_DEFINE3(vnode_check_deleteacl, "struct ucred *",
"struct vnode *", "acl_type_t");
int
mac_vnode_check_deleteacl(struct ucred *cred, struct vnode *vp,
acl_type_t type)
{
int error;
ASSERT_VOP_LOCKED(vp, "mac_vnode_check_deleteacl");
MAC_POLICY_CHECK(vnode_check_deleteacl, cred, vp, vp->v_label, type);
MAC_CHECK_PROBE3(vnode_check_deleteacl, error, cred, vp, type);
return (error);
}
MAC_CHECK_PROBE_DEFINE4(vnode_check_deleteextattr, "struct ucred *",
"struct vnode *", "int", "const char *");
int
mac_vnode_check_deleteextattr(struct ucred *cred, struct vnode *vp,
int attrnamespace, const char *name)
{
int error;
ASSERT_VOP_LOCKED(vp, "mac_vnode_check_deleteextattr");
MAC_POLICY_CHECK(vnode_check_deleteextattr, cred, vp, vp->v_label,
attrnamespace, name);
MAC_CHECK_PROBE4(vnode_check_deleteextattr, error, cred, vp,
attrnamespace, name);
return (error);
}
MAC_CHECK_PROBE_DEFINE3(vnode_check_exec, "struct ucred *", "struct vnode *",
"struct image_params *");
int
mac_vnode_check_exec(struct ucred *cred, struct vnode *vp,
struct image_params *imgp)
{
int error;
ASSERT_VOP_LOCKED(vp, "mac_vnode_check_exec");
MAC_POLICY_CHECK(vnode_check_exec, cred, vp, vp->v_label, imgp,
imgp->execlabel);
MAC_CHECK_PROBE3(vnode_check_exec, error, cred, vp, imgp);
return (error);
}
MAC_CHECK_PROBE_DEFINE3(vnode_check_getacl, "struct ucred *",
"struct vnode *", "acl_type_t");
int
mac_vnode_check_getacl(struct ucred *cred, struct vnode *vp, acl_type_t type)
{
int error;
ASSERT_VOP_LOCKED(vp, "mac_vnode_check_getacl");
MAC_POLICY_CHECK(vnode_check_getacl, cred, vp, vp->v_label, type);
MAC_CHECK_PROBE3(vnode_check_getacl, error, cred, vp, type);
return (error);
}
MAC_CHECK_PROBE_DEFINE4(vnode_check_getextattr, "struct ucred *",
"struct vnode *", "int", "const char *");
int
mac_vnode_check_getextattr(struct ucred *cred, struct vnode *vp,
int attrnamespace, const char *name)
{
int error;
ASSERT_VOP_LOCKED(vp, "mac_vnode_check_getextattr");
MAC_POLICY_CHECK(vnode_check_getextattr, cred, vp, vp->v_label,
attrnamespace, name);
MAC_CHECK_PROBE4(vnode_check_getextattr, error, cred, vp,
attrnamespace, name);
return (error);
}
MAC_CHECK_PROBE_DEFINE4(vnode_check_link, "struct ucred *", "struct vnode *",
"struct vnode *", "struct componentname *");
int
mac_vnode_check_link(struct ucred *cred, struct vnode *dvp,
struct vnode *vp, struct componentname *cnp)
{
int error;
ASSERT_VOP_LOCKED(dvp, "mac_vnode_check_link");
ASSERT_VOP_LOCKED(vp, "mac_vnode_check_link");
MAC_POLICY_CHECK(vnode_check_link, cred, dvp, dvp->v_label, vp,
vp->v_label, cnp);
MAC_CHECK_PROBE4(vnode_check_link, error, cred, dvp, vp, cnp);
return (error);
}
MAC_CHECK_PROBE_DEFINE3(vnode_check_listextattr, "struct ucred *",
"struct vnode *", "int");
int
mac_vnode_check_listextattr(struct ucred *cred, struct vnode *vp,
int attrnamespace)
{
int error;
ASSERT_VOP_LOCKED(vp, "mac_vnode_check_listextattr");
MAC_POLICY_CHECK(vnode_check_listextattr, cred, vp, vp->v_label,
attrnamespace);
MAC_CHECK_PROBE3(vnode_check_listextattr, error, cred, vp,
attrnamespace);
return (error);
}
MAC_CHECK_PROBE_DEFINE3(vnode_check_lookup, "struct ucred *",
"struct vnode *", "struct componentname *");
int
mac_vnode_check_lookup(struct ucred *cred, struct vnode *dvp,
struct componentname *cnp)
{
int error;
ASSERT_VOP_LOCKED(dvp, "mac_vnode_check_lookup");
MAC_POLICY_CHECK(vnode_check_lookup, cred, dvp, dvp->v_label, cnp);
MAC_CHECK_PROBE3(vnode_check_lookup, error, cred, dvp, cnp);
return (error);
}
MAC_CHECK_PROBE_DEFINE4(vnode_check_mmap, "struct ucred *", "struct vnode *",
"int", "int");
int
mac_vnode_check_mmap(struct ucred *cred, struct vnode *vp, int prot,
int flags)
{
int error;
ASSERT_VOP_LOCKED(vp, "mac_vnode_check_mmap");
MAC_POLICY_CHECK(vnode_check_mmap, cred, vp, vp->v_label, prot, flags);
MAC_CHECK_PROBE4(vnode_check_mmap, error, cred, vp, prot, flags);
return (error);
}
void
mac_vnode_check_mmap_downgrade(struct ucred *cred, struct vnode *vp,
int *prot)
{
int result = *prot;
ASSERT_VOP_LOCKED(vp, "mac_vnode_check_mmap_downgrade");
MAC_POLICY_PERFORM(vnode_check_mmap_downgrade, cred, vp, vp->v_label,
&result);
*prot = result;
}
MAC_CHECK_PROBE_DEFINE3(vnode_check_mprotect, "struct ucred *",
"struct vnode *", "int");
int
mac_vnode_check_mprotect(struct ucred *cred, struct vnode *vp, int prot)
{
int error;
ASSERT_VOP_LOCKED(vp, "mac_vnode_check_mprotect");
MAC_POLICY_CHECK(vnode_check_mprotect, cred, vp, vp->v_label, prot);
MAC_CHECK_PROBE3(vnode_check_mprotect, error, cred, vp, prot);
return (error);
}
MAC_CHECK_PROBE_DEFINE3(vnode_check_open, "struct ucred *", "struct vnode *",
"accmode_t");
int
mac_vnode_check_open(struct ucred *cred, struct vnode *vp, accmode_t accmode)
{
int error;
ASSERT_VOP_LOCKED(vp, "mac_vnode_check_open");
MAC_POLICY_CHECK(vnode_check_open, cred, vp, vp->v_label, accmode);
MAC_CHECK_PROBE3(vnode_check_open, error, cred, vp, accmode);
return (error);
}
MAC_CHECK_PROBE_DEFINE3(vnode_check_poll, "struct ucred *", "struct ucred *",
"struct vnode *");
int
mac_vnode_check_poll(struct ucred *active_cred, struct ucred *file_cred,
struct vnode *vp)
{
int error;
ASSERT_VOP_LOCKED(vp, "mac_vnode_check_poll");
MAC_POLICY_CHECK(vnode_check_poll, active_cred, file_cred, vp,
vp->v_label);
MAC_CHECK_PROBE3(vnode_check_poll, error, active_cred, file_cred,
vp);
return (error);
}
MAC_CHECK_PROBE_DEFINE3(vnode_check_read, "struct ucred *", "struct ucred *",
"struct vnode *");
int
mac_vnode_check_read(struct ucred *active_cred, struct ucred *file_cred,
struct vnode *vp)
{
int error;
ASSERT_VOP_LOCKED(vp, "mac_vnode_check_read");
MAC_POLICY_CHECK(vnode_check_read, active_cred, file_cred, vp,
vp->v_label);
MAC_CHECK_PROBE3(vnode_check_read, error, active_cred, file_cred,
vp);
return (error);
}
MAC_CHECK_PROBE_DEFINE2(vnode_check_readdir, "struct ucred *",
"struct vnode *");
int
mac_vnode_check_readdir(struct ucred *cred, struct vnode *dvp)
{
int error;
ASSERT_VOP_LOCKED(dvp, "mac_vnode_check_readdir");
MAC_POLICY_CHECK(vnode_check_readdir, cred, dvp, dvp->v_label);
MAC_CHECK_PROBE2(vnode_check_readdir, error, cred, dvp);
return (error);
}
MAC_CHECK_PROBE_DEFINE2(vnode_check_readlink, "struct ucred *",
"struct vnode *");
int
mac_vnode_check_readlink(struct ucred *cred, struct vnode *vp)
{
int error;
ASSERT_VOP_LOCKED(vp, "mac_vnode_check_readlink");
MAC_POLICY_CHECK(vnode_check_readlink, cred, vp, vp->v_label);
MAC_CHECK_PROBE2(vnode_check_readlink, error, cred, vp);
return (error);
}
MAC_CHECK_PROBE_DEFINE3(vnode_check_relabel, "struct ucred *",
"struct vnode *", "struct label *");
static int
mac_vnode_check_relabel(struct ucred *cred, struct vnode *vp,
struct label *newlabel)
{
int error;
ASSERT_VOP_LOCKED(vp, "mac_vnode_check_relabel");
MAC_POLICY_CHECK(vnode_check_relabel, cred, vp, vp->v_label, newlabel);
MAC_CHECK_PROBE3(vnode_check_relabel, error, cred, vp, newlabel);
return (error);
}
MAC_CHECK_PROBE_DEFINE4(vnode_check_rename_from, "struct ucred *",
"struct vnode *", "struct vnode *", "struct componentname *");
int
mac_vnode_check_rename_from(struct ucred *cred, struct vnode *dvp,
struct vnode *vp, struct componentname *cnp)
{
int error;
ASSERT_VOP_LOCKED(dvp, "mac_vnode_check_rename_from");
ASSERT_VOP_LOCKED(vp, "mac_vnode_check_rename_from");
MAC_POLICY_CHECK(vnode_check_rename_from, cred, dvp, dvp->v_label, vp,
vp->v_label, cnp);
MAC_CHECK_PROBE4(vnode_check_rename_from, error, cred, dvp, vp, cnp);
return (error);
}
MAC_CHECK_PROBE_DEFINE4(vnode_check_rename_to, "struct ucred *",
"struct vnode *", "struct vnode *", "struct componentname *");
int
mac_vnode_check_rename_to(struct ucred *cred, struct vnode *dvp,
struct vnode *vp, int samedir, struct componentname *cnp)
{
int error;
ASSERT_VOP_LOCKED(dvp, "mac_vnode_check_rename_to");
ASSERT_VOP_LOCKED(vp, "mac_vnode_check_rename_to");
MAC_POLICY_CHECK(vnode_check_rename_to, cred, dvp, dvp->v_label, vp,
vp != NULL ? vp->v_label : NULL, samedir, cnp);
MAC_CHECK_PROBE4(vnode_check_rename_to, error, cred, dvp, vp, cnp);
return (error);
}
MAC_CHECK_PROBE_DEFINE2(vnode_check_revoke, "struct ucred *",
"struct vnode *");
int
mac_vnode_check_revoke(struct ucred *cred, struct vnode *vp)
{
int error;
ASSERT_VOP_LOCKED(vp, "mac_vnode_check_revoke");
MAC_POLICY_CHECK(vnode_check_revoke, cred, vp, vp->v_label);
MAC_CHECK_PROBE2(vnode_check_revoke, error, cred, vp);
return (error);
}
MAC_CHECK_PROBE_DEFINE4(vnode_check_setacl, "struct ucred *",
"struct vnode *", "acl_tpe_t", "struct acl *");
int
mac_vnode_check_setacl(struct ucred *cred, struct vnode *vp, acl_type_t type,
struct acl *acl)
{
int error;
ASSERT_VOP_LOCKED(vp, "mac_vnode_check_setacl");
MAC_POLICY_CHECK(vnode_check_setacl, cred, vp, vp->v_label, type, acl);
MAC_CHECK_PROBE4(vnode_check_setacl, error, cred, vp, type, acl);
return (error);
}
MAC_CHECK_PROBE_DEFINE4(vnode_check_setextattr, "struct ucred *",
"struct vnode *", "int", "const char *");
int
mac_vnode_check_setextattr(struct ucred *cred, struct vnode *vp,
int attrnamespace, const char *name)
{
int error;
ASSERT_VOP_LOCKED(vp, "mac_vnode_check_setextattr");
MAC_POLICY_CHECK(vnode_check_setextattr, cred, vp, vp->v_label,
attrnamespace, name);
MAC_CHECK_PROBE4(vnode_check_setextattr, error, cred, vp,
attrnamespace, name);
return (error);
}
MAC_CHECK_PROBE_DEFINE3(vnode_check_setflags, "struct ucred *",
"struct vnode *", "u_long");
int
mac_vnode_check_setflags(struct ucred *cred, struct vnode *vp, u_long flags)
{
int error;
ASSERT_VOP_LOCKED(vp, "mac_vnode_check_setflags");
MAC_POLICY_CHECK(vnode_check_setflags, cred, vp, vp->v_label, flags);
MAC_CHECK_PROBE3(vnode_check_setflags, error, cred, vp, flags);
return (error);
}
MAC_CHECK_PROBE_DEFINE3(vnode_check_setmode, "struct ucred *",
"struct vnode *", "mode_t");
int
mac_vnode_check_setmode(struct ucred *cred, struct vnode *vp, mode_t mode)
{
int error;
ASSERT_VOP_LOCKED(vp, "mac_vnode_check_setmode");
MAC_POLICY_CHECK(vnode_check_setmode, cred, vp, vp->v_label, mode);
MAC_CHECK_PROBE3(vnode_check_setmode, error, cred, vp, mode);
return (error);
}
MAC_CHECK_PROBE_DEFINE4(vnode_check_setowner, "struct ucred *",
"struct vnode *", "uid_t", "gid_t");
int
mac_vnode_check_setowner(struct ucred *cred, struct vnode *vp, uid_t uid,
gid_t gid)
{
int error;
ASSERT_VOP_LOCKED(vp, "mac_vnode_check_setowner");
MAC_POLICY_CHECK(vnode_check_setowner, cred, vp, vp->v_label, uid, gid);
MAC_CHECK_PROBE4(vnode_check_setowner, error, cred, vp, uid, gid);
return (error);
}
MAC_CHECK_PROBE_DEFINE4(vnode_check_setutimes, "struct ucred *",
"struct vnode *", "struct timespec *", "struct timespec *");
int
mac_vnode_check_setutimes(struct ucred *cred, struct vnode *vp,
struct timespec atime, struct timespec mtime)
{
int error;
ASSERT_VOP_LOCKED(vp, "mac_vnode_check_setutimes");
MAC_POLICY_CHECK(vnode_check_setutimes, cred, vp, vp->v_label, atime,
mtime);
MAC_CHECK_PROBE4(vnode_check_setutimes, error, cred, vp, &atime,
&mtime);
return (error);
}
MAC_CHECK_PROBE_DEFINE3(vnode_check_stat, "struct ucred *", "struct ucred *",
"struct vnode *");
int
mac_vnode_check_stat(struct ucred *active_cred, struct ucred *file_cred,
struct vnode *vp)
{
int error;
ASSERT_VOP_LOCKED(vp, "mac_vnode_check_stat");
MAC_POLICY_CHECK(vnode_check_stat, active_cred, file_cred, vp,
vp->v_label);
MAC_CHECK_PROBE3(vnode_check_stat, error, active_cred, file_cred,
vp);
return (error);
}
MAC_CHECK_PROBE_DEFINE4(vnode_check_unlink, "struct ucred *",
"struct vnode *", "struct vnode *", "struct componentname *");
int
mac_vnode_check_unlink(struct ucred *cred, struct vnode *dvp,
struct vnode *vp, struct componentname *cnp)
{
int error;
ASSERT_VOP_LOCKED(dvp, "mac_vnode_check_unlink");
ASSERT_VOP_LOCKED(vp, "mac_vnode_check_unlink");
MAC_POLICY_CHECK(vnode_check_unlink, cred, dvp, dvp->v_label, vp,
vp->v_label, cnp);
MAC_CHECK_PROBE4(vnode_check_unlink, error, cred, dvp, vp, cnp);
return (error);
}
MAC_CHECK_PROBE_DEFINE3(vnode_check_write, "struct ucred *",
"struct ucred *", "struct vnode *");
int
mac_vnode_check_write(struct ucred *active_cred, struct ucred *file_cred,
struct vnode *vp)
{
int error;
ASSERT_VOP_LOCKED(vp, "mac_vnode_check_write");
MAC_POLICY_CHECK(vnode_check_write, active_cred, file_cred, vp,
vp->v_label);
MAC_CHECK_PROBE3(vnode_check_write, error, active_cred, file_cred,
vp);
return (error);
}
void
mac_vnode_relabel(struct ucred *cred, struct vnode *vp,
struct label *newlabel)
{
MAC_POLICY_PERFORM(vnode_relabel, cred, vp, vp->v_label, newlabel);
}
void
mac_mount_create(struct ucred *cred, struct mount *mp)
{
MAC_POLICY_PERFORM(mount_create, cred, mp, mp->mnt_label);
}
MAC_CHECK_PROBE_DEFINE2(mount_check_stat, "struct ucred *",
"struct mount *");
int
mac_mount_check_stat(struct ucred *cred, struct mount *mount)
{
int error;
MAC_POLICY_CHECK_NOSLEEP(mount_check_stat, cred, mount, mount->mnt_label);
MAC_CHECK_PROBE2(mount_check_stat, error, cred, mount);
return (error);
}
void
mac_devfs_create_device(struct ucred *cred, struct mount *mp,
struct cdev *dev, struct devfs_dirent *de)
{
MAC_POLICY_PERFORM_NOSLEEP(devfs_create_device, cred, mp, dev, de,
de->de_label);
}
void
mac_devfs_create_symlink(struct ucred *cred, struct mount *mp,
struct devfs_dirent *dd, struct devfs_dirent *de)
{
MAC_POLICY_PERFORM_NOSLEEP(devfs_create_symlink, cred, mp, dd,
dd->de_label, de, de->de_label);
}
void
mac_devfs_create_directory(struct mount *mp, char *dirname, int dirnamelen,
struct devfs_dirent *de)
{
MAC_POLICY_PERFORM_NOSLEEP(devfs_create_directory, mp, dirname,
dirnamelen, de, de->de_label);
}
/*
* Implementation of VOP_SETLABEL() that relies on extended attributes to
* store label data. Can be referenced by filesystems supporting extended
* attributes.
*/
int
vop_stdsetlabel_ea(struct vop_setlabel_args *ap)
{
struct vnode *vp = ap->a_vp;
struct label *intlabel = ap->a_label;
int error;
ASSERT_VOP_LOCKED(vp, "vop_stdsetlabel_ea");
if ((vp->v_mount->mnt_flag & MNT_MULTILABEL) == 0)
return (EOPNOTSUPP);
error = mac_vnode_setlabel_extattr(ap->a_cred, vp, intlabel);
if (error)
return (error);
mac_vnode_relabel(ap->a_cred, vp, intlabel);
return (0);
}
int
vn_setlabel(struct vnode *vp, struct label *intlabel, struct ucred *cred)
{
int error;
if (vp->v_mount == NULL) {
/* printf("vn_setlabel: null v_mount\n"); */
if (vp->v_type != VNON)
printf("vn_setlabel: null v_mount with non-VNON\n");
return (EBADF);
}
if ((vp->v_mount->mnt_flag & MNT_MULTILABEL) == 0)
return (EOPNOTSUPP);
/*
* Multi-phase commit. First check the policies to confirm the
* change is OK. Then commit via the filesystem. Finally, update
* the actual vnode label.
*
* Question: maybe the filesystem should update the vnode at the end
* as part of VOP_SETLABEL()?
*/
error = mac_vnode_check_relabel(cred, vp, intlabel);
if (error)
return (error);
/*
* VADMIN provides the opportunity for the filesystem to make
* decisions about who is and is not able to modify labels and
* protections on files. This might not be right. We can't assume
* VOP_SETLABEL() will do it, because we might implement that as part
* of vop_stdsetlabel_ea().
*/
error = VOP_ACCESS(vp, VADMIN, cred, curthread);
if (error)
return (error);
error = VOP_SETLABEL(vp, intlabel, cred, curthread);
if (error)
return (error);
return (0);
}