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- /*-
- * 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>
- #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_impl(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_impl(struct ucred *cred, struct vnode *dvp,
- struct componentname *cnp)
- {
- int error;
- ASSERT_VOP_LOCKED(dvp, "mac_vnode_check_lookup");
- if ((cnp->cn_flags & NOMACCHECK) != 0)
- return (0);
- 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_impl(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_impl(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_impl(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_impl(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_type_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_impl(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_impl(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);
- /*
- * XXXRW: See the comment below in vn_setlabel() as to why this might
- * be the wrong place to call mac_vnode_relabel().
- */
- 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.
- */
- 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);
- /*
- * It would be more symmetric if mac_vnode_relabel() was called here
- * rather than in VOP_SETLABEL(), but we don't for historical reasons.
- * We should think about moving it so that the filesystem is
- * responsible only for persistence in VOP_SETLABEL(), not the vnode
- * label update itself.
- */
- return (0);
- }
- #ifdef DEBUG_VFS_LOCKS
- void
- mac_vnode_assert_locked(struct vnode *vp, const char *func)
- {
- ASSERT_VOP_LOCKED(vp, func);
- }
- #endif
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