mac_vfs.c revision 256281
1230557Sjimharris/*- 2230557Sjimharris * Copyright (c) 1999-2002, 2009 Robert N. M. Watson 3230557Sjimharris * Copyright (c) 2001 Ilmar S. Habibulin 4230557Sjimharris * Copyright (c) 2001-2005 McAfee, Inc. 5230557Sjimharris * Copyright (c) 2005-2006 SPARTA, Inc. 6230557Sjimharris * Copyright (c) 2008 Apple Inc. 7230557Sjimharris * All rights reserved. 8230557Sjimharris * 9230557Sjimharris * This software was developed by Robert Watson and Ilmar Habibulin for the 10230557Sjimharris * TrustedBSD Project. 11230557Sjimharris * 12230557Sjimharris * This software was developed for the FreeBSD Project in part by McAfee 13230557Sjimharris * Research, the Security Research Division of McAfee, Inc. under 14230557Sjimharris * DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA 15230557Sjimharris * CHATS research program. 16230557Sjimharris * 17230557Sjimharris * This software was enhanced by SPARTA ISSO under SPAWAR contract 18230557Sjimharris * N66001-04-C-6019 ("SEFOS"). 19230557Sjimharris * 20230557Sjimharris * This software was developed at the University of Cambridge Computer 21230557Sjimharris * Laboratory with support from a grant from Google, Inc. 22230557Sjimharris * 23230557Sjimharris * Redistribution and use in source and binary forms, with or without 24230557Sjimharris * modification, are permitted provided that the following conditions 25230557Sjimharris * are met: 26230557Sjimharris * 1. Redistributions of source code must retain the above copyright 27230557Sjimharris * notice, this list of conditions and the following disclaimer. 28230557Sjimharris * 2. Redistributions in binary form must reproduce the above copyright 29230557Sjimharris * notice, this list of conditions and the following disclaimer in the 30230557Sjimharris * documentation and/or other materials provided with the distribution. 31230557Sjimharris * 32230557Sjimharris * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 33230557Sjimharris * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 34230557Sjimharris * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 35230557Sjimharris * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 36230557Sjimharris * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 37230557Sjimharris * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 38230557Sjimharris * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 39230557Sjimharris * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 40230557Sjimharris * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 41230557Sjimharris * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 42230557Sjimharris * SUCH DAMAGE. 43230557Sjimharris */ 44230557Sjimharris 45230557Sjimharris#include <sys/cdefs.h> 46230557Sjimharris__FBSDID("$FreeBSD: stable/10/sys/security/mac/mac_vfs.c 255971 2013-10-01 15:40:27Z markj $"); 47230557Sjimharris 48230557Sjimharris#include "opt_kdtrace.h" 49230557Sjimharris#include "opt_mac.h" 50230557Sjimharris 51230557Sjimharris#include <sys/param.h> 52230557Sjimharris#include <sys/condvar.h> 53230557Sjimharris#include <sys/extattr.h> 54230557Sjimharris#include <sys/imgact.h> 55230557Sjimharris#include <sys/kernel.h> 56230557Sjimharris#include <sys/lock.h> 57230557Sjimharris#include <sys/malloc.h> 58230557Sjimharris#include <sys/mutex.h> 59230557Sjimharris#include <sys/proc.h> 60230557Sjimharris#include <sys/sbuf.h> 61230557Sjimharris#include <sys/systm.h> 62230557Sjimharris#include <sys/vnode.h> 63230557Sjimharris#include <sys/mount.h> 64230557Sjimharris#include <sys/file.h> 65230557Sjimharris#include <sys/namei.h> 66230557Sjimharris#include <sys/sdt.h> 67230557Sjimharris#include <sys/sysctl.h> 68230557Sjimharris 69230557Sjimharris#include <vm/vm.h> 70230557Sjimharris#include <vm/pmap.h> 71230557Sjimharris#include <vm/vm_map.h> 72230557Sjimharris#include <vm/vm_object.h> 73230557Sjimharris 74230557Sjimharris#include <fs/devfs/devfs.h> 75230557Sjimharris 76230557Sjimharris#include <security/mac/mac_framework.h> 77230557Sjimharris#include <security/mac/mac_internal.h> 78230557Sjimharris#include <security/mac/mac_policy.h> 79230557Sjimharris 80230557Sjimharris/* 81230557Sjimharris * Warn about EA transactions only the first time they happen. No locking on 82230557Sjimharris * this variable. 83230557Sjimharris */ 84230557Sjimharrisstatic int ea_warn_once = 0; 85230557Sjimharris 86230557Sjimharrisstatic int mac_vnode_setlabel_extattr(struct ucred *cred, 87230557Sjimharris struct vnode *vp, struct label *intlabel); 88230557Sjimharris 89230557Sjimharrisstatic struct label * 90230557Sjimharrismac_devfs_label_alloc(void) 91230557Sjimharris{ 92230557Sjimharris struct label *label; 93230557Sjimharris 94230557Sjimharris label = mac_labelzone_alloc(M_WAITOK); 95230557Sjimharris MAC_POLICY_PERFORM(devfs_init_label, label); 96230557Sjimharris return (label); 97230557Sjimharris} 98230557Sjimharris 99230557Sjimharrisvoid 100230557Sjimharrismac_devfs_init(struct devfs_dirent *de) 101230557Sjimharris{ 102230557Sjimharris 103230557Sjimharris if (mac_labeled & MPC_OBJECT_DEVFS) 104230557Sjimharris de->de_label = mac_devfs_label_alloc(); 105230557Sjimharris else 106230557Sjimharris de->de_label = NULL; 107230557Sjimharris} 108230557Sjimharris 109230557Sjimharrisstatic struct label * 110230557Sjimharrismac_mount_label_alloc(void) 111230557Sjimharris{ 112230557Sjimharris struct label *label; 113230557Sjimharris 114230557Sjimharris label = mac_labelzone_alloc(M_WAITOK); 115230557Sjimharris MAC_POLICY_PERFORM(mount_init_label, label); 116230557Sjimharris return (label); 117230557Sjimharris} 118230557Sjimharris 119230557Sjimharrisvoid 120230557Sjimharrismac_mount_init(struct mount *mp) 121230557Sjimharris{ 122230557Sjimharris 123230557Sjimharris if (mac_labeled & MPC_OBJECT_MOUNT) 124230557Sjimharris mp->mnt_label = mac_mount_label_alloc(); 125230557Sjimharris else 126230557Sjimharris mp->mnt_label = NULL; 127230557Sjimharris} 128230557Sjimharris 129230557Sjimharrisstruct label * 130230557Sjimharrismac_vnode_label_alloc(void) 131230557Sjimharris{ 132230557Sjimharris struct label *label; 133230557Sjimharris 134230557Sjimharris label = mac_labelzone_alloc(M_WAITOK); 135230557Sjimharris MAC_POLICY_PERFORM(vnode_init_label, label); 136230557Sjimharris return (label); 137230557Sjimharris} 138230557Sjimharris 139230557Sjimharrisvoid 140230557Sjimharrismac_vnode_init(struct vnode *vp) 141230557Sjimharris{ 142230557Sjimharris 143230557Sjimharris if (mac_labeled & MPC_OBJECT_VNODE) 144230557Sjimharris vp->v_label = mac_vnode_label_alloc(); 145230557Sjimharris else 146230557Sjimharris vp->v_label = NULL; 147230557Sjimharris} 148230557Sjimharris 149230557Sjimharrisstatic void 150230557Sjimharrismac_devfs_label_free(struct label *label) 151230557Sjimharris{ 152230557Sjimharris 153230557Sjimharris MAC_POLICY_PERFORM_NOSLEEP(devfs_destroy_label, label); 154230557Sjimharris mac_labelzone_free(label); 155230557Sjimharris} 156230557Sjimharris 157230557Sjimharrisvoid 158230557Sjimharrismac_devfs_destroy(struct devfs_dirent *de) 159230557Sjimharris{ 160230557Sjimharris 161230557Sjimharris if (de->de_label != NULL) { 162230557Sjimharris mac_devfs_label_free(de->de_label); 163230557Sjimharris de->de_label = NULL; 164230557Sjimharris } 165230557Sjimharris} 166230557Sjimharris 167230557Sjimharrisstatic void 168230557Sjimharrismac_mount_label_free(struct label *label) 169230557Sjimharris{ 170230557Sjimharris 171230557Sjimharris MAC_POLICY_PERFORM_NOSLEEP(mount_destroy_label, label); 172230557Sjimharris mac_labelzone_free(label); 173230557Sjimharris} 174230557Sjimharris 175230557Sjimharrisvoid 176230557Sjimharrismac_mount_destroy(struct mount *mp) 177230557Sjimharris{ 178230557Sjimharris 179230557Sjimharris if (mp->mnt_label != NULL) { 180230557Sjimharris mac_mount_label_free(mp->mnt_label); 181230557Sjimharris mp->mnt_label = NULL; 182230557Sjimharris } 183230557Sjimharris} 184230557Sjimharris 185230557Sjimharrisvoid 186230557Sjimharrismac_vnode_label_free(struct label *label) 187230557Sjimharris{ 188230557Sjimharris 189230557Sjimharris MAC_POLICY_PERFORM_NOSLEEP(vnode_destroy_label, label); 190230557Sjimharris mac_labelzone_free(label); 191230557Sjimharris} 192230557Sjimharris 193230557Sjimharrisvoid 194230557Sjimharrismac_vnode_destroy(struct vnode *vp) 195230557Sjimharris{ 196230557Sjimharris 197230557Sjimharris if (vp->v_label != NULL) { 198230557Sjimharris mac_vnode_label_free(vp->v_label); 199230557Sjimharris vp->v_label = NULL; 200230557Sjimharris } 201230557Sjimharris} 202230557Sjimharris 203230557Sjimharrisvoid 204230557Sjimharrismac_vnode_copy_label(struct label *src, struct label *dest) 205230557Sjimharris{ 206230557Sjimharris 207230557Sjimharris MAC_POLICY_PERFORM_NOSLEEP(vnode_copy_label, src, dest); 208230557Sjimharris} 209230557Sjimharris 210230557Sjimharrisint 211230557Sjimharrismac_vnode_externalize_label(struct label *label, char *elements, 212230557Sjimharris char *outbuf, size_t outbuflen) 213230557Sjimharris{ 214230557Sjimharris int error; 215230557Sjimharris 216230557Sjimharris MAC_POLICY_EXTERNALIZE(vnode, label, elements, outbuf, outbuflen); 217230557Sjimharris 218230557Sjimharris return (error); 219230557Sjimharris} 220230557Sjimharris 221230557Sjimharrisint 222230557Sjimharrismac_vnode_internalize_label(struct label *label, char *string) 223230557Sjimharris{ 224230557Sjimharris int error; 225230557Sjimharris 226230557Sjimharris MAC_POLICY_INTERNALIZE(vnode, label, string); 227230557Sjimharris 228230557Sjimharris return (error); 229230557Sjimharris} 230230557Sjimharris 231230557Sjimharrisvoid 232230557Sjimharrismac_devfs_update(struct mount *mp, struct devfs_dirent *de, struct vnode *vp) 233230557Sjimharris{ 234230557Sjimharris 235230557Sjimharris MAC_POLICY_PERFORM_NOSLEEP(devfs_update, mp, de, de->de_label, vp, 236230557Sjimharris vp->v_label); 237230557Sjimharris} 238230557Sjimharris 239230557Sjimharrisvoid 240230557Sjimharrismac_devfs_vnode_associate(struct mount *mp, struct devfs_dirent *de, 241230557Sjimharris struct vnode *vp) 242230557Sjimharris{ 243230557Sjimharris 244230557Sjimharris MAC_POLICY_PERFORM_NOSLEEP(devfs_vnode_associate, mp, mp->mnt_label, 245230557Sjimharris de, de->de_label, vp, vp->v_label); 246230557Sjimharris} 247230557Sjimharris 248230557Sjimharrisint 249230557Sjimharrismac_vnode_associate_extattr(struct mount *mp, struct vnode *vp) 250230557Sjimharris{ 251230557Sjimharris int error; 252230557Sjimharris 253230557Sjimharris ASSERT_VOP_LOCKED(vp, "mac_vnode_associate_extattr"); 254230557Sjimharris 255230557Sjimharris MAC_POLICY_CHECK(vnode_associate_extattr, mp, mp->mnt_label, vp, 256230557Sjimharris vp->v_label); 257230557Sjimharris 258230557Sjimharris return (error); 259230557Sjimharris} 260230557Sjimharris 261230557Sjimharrisvoid 262230557Sjimharrismac_vnode_associate_singlelabel(struct mount *mp, struct vnode *vp) 263230557Sjimharris{ 264230557Sjimharris 265230557Sjimharris MAC_POLICY_PERFORM_NOSLEEP(vnode_associate_singlelabel, mp, 266230557Sjimharris mp->mnt_label, vp, vp->v_label); 267230557Sjimharris} 268230557Sjimharris 269230557Sjimharris/* 270230557Sjimharris * Functions implementing extended-attribute backed labels for file systems 271230557Sjimharris * that support it. 272230557Sjimharris * 273230557Sjimharris * Where possible, we use EA transactions to make writes to multiple 274230557Sjimharris * attributes across difference policies mutually atomic. We allow work to 275230557Sjimharris * continue on file systems not supporting EA transactions, but generate a 276230557Sjimharris * printf warning. 277230557Sjimharris */ 278230557Sjimharrisint 279230557Sjimharrismac_vnode_create_extattr(struct ucred *cred, struct mount *mp, 280230557Sjimharris struct vnode *dvp, struct vnode *vp, struct componentname *cnp) 281230557Sjimharris{ 282230557Sjimharris int error; 283230557Sjimharris 284230557Sjimharris ASSERT_VOP_LOCKED(dvp, "mac_vnode_create_extattr"); 285230557Sjimharris ASSERT_VOP_LOCKED(vp, "mac_vnode_create_extattr"); 286230557Sjimharris 287230557Sjimharris error = VOP_OPENEXTATTR(vp, cred, curthread); 288230557Sjimharris if (error == EOPNOTSUPP) { 289230557Sjimharris if (ea_warn_once == 0) { 290230557Sjimharris printf("Warning: transactions not supported " 291230557Sjimharris "in EA write.\n"); 292230557Sjimharris ea_warn_once = 1; 293230557Sjimharris } 294230557Sjimharris } else if (error) 295230557Sjimharris return (error); 296230557Sjimharris 297230557Sjimharris MAC_POLICY_CHECK(vnode_create_extattr, cred, mp, mp->mnt_label, dvp, 298230557Sjimharris dvp->v_label, vp, vp->v_label, cnp); 299230557Sjimharris 300230557Sjimharris if (error) { 301230557Sjimharris VOP_CLOSEEXTATTR(vp, 0, NOCRED, curthread); 302230557Sjimharris return (error); 303230557Sjimharris } 304230557Sjimharris 305230557Sjimharris error = VOP_CLOSEEXTATTR(vp, 1, NOCRED, curthread); 306230557Sjimharris if (error == EOPNOTSUPP) 307230557Sjimharris error = 0; 308230557Sjimharris 309230557Sjimharris return (error); 310230557Sjimharris} 311230557Sjimharris 312230557Sjimharrisstatic int 313230557Sjimharrismac_vnode_setlabel_extattr(struct ucred *cred, struct vnode *vp, 314230557Sjimharris struct label *intlabel) 315230557Sjimharris{ 316230557Sjimharris int error; 317230557Sjimharris 318230557Sjimharris ASSERT_VOP_LOCKED(vp, "mac_vnode_setlabel_extattr"); 319230557Sjimharris 320230557Sjimharris error = VOP_OPENEXTATTR(vp, cred, curthread); 321230557Sjimharris if (error == EOPNOTSUPP) { 322230557Sjimharris if (ea_warn_once == 0) { 323230557Sjimharris printf("Warning: transactions not supported " 324230557Sjimharris "in EA write.\n"); 325230557Sjimharris ea_warn_once = 1; 326230557Sjimharris } 327230557Sjimharris } else if (error) 328230557Sjimharris return (error); 329230557Sjimharris 330230557Sjimharris MAC_POLICY_CHECK(vnode_setlabel_extattr, cred, vp, vp->v_label, 331230557Sjimharris intlabel); 332230557Sjimharris 333230557Sjimharris if (error) { 334230557Sjimharris VOP_CLOSEEXTATTR(vp, 0, NOCRED, curthread); 335230557Sjimharris return (error); 336230557Sjimharris } 337230557Sjimharris 338230557Sjimharris error = VOP_CLOSEEXTATTR(vp, 1, NOCRED, curthread); 339230557Sjimharris if (error == EOPNOTSUPP) 340230557Sjimharris error = 0; 341230557Sjimharris 342230557Sjimharris return (error); 343230557Sjimharris} 344230557Sjimharris 345230557Sjimharrisvoid 346230557Sjimharrismac_vnode_execve_transition(struct ucred *old, struct ucred *new, 347230557Sjimharris struct vnode *vp, struct label *interpvplabel, struct image_params *imgp) 348230557Sjimharris{ 349230557Sjimharris 350230557Sjimharris ASSERT_VOP_LOCKED(vp, "mac_vnode_execve_transition"); 351230557Sjimharris 352230557Sjimharris MAC_POLICY_PERFORM(vnode_execve_transition, old, new, vp, 353230557Sjimharris vp->v_label, interpvplabel, imgp, imgp->execlabel); 354230557Sjimharris} 355230557Sjimharris 356230557Sjimharrisint 357230557Sjimharrismac_vnode_execve_will_transition(struct ucred *old, struct vnode *vp, 358230557Sjimharris struct label *interpvplabel, struct image_params *imgp) 359230557Sjimharris{ 360230557Sjimharris int result; 361230557Sjimharris 362230557Sjimharris ASSERT_VOP_LOCKED(vp, "mac_vnode_execve_will_transition"); 363230557Sjimharris 364230557Sjimharris result = 0; 365230557Sjimharris /* No sleeping since the process lock will be held by the caller. */ 366230557Sjimharris MAC_POLICY_BOOLEAN_NOSLEEP(vnode_execve_will_transition, ||, old, vp, 367230557Sjimharris vp->v_label, interpvplabel, imgp, imgp->execlabel); 368230557Sjimharris 369230557Sjimharris return (result); 370230557Sjimharris} 371230557Sjimharris 372230557SjimharrisMAC_CHECK_PROBE_DEFINE3(vnode_check_access, "struct ucred *", 373230557Sjimharris "struct vnode *", "accmode_t"); 374230557Sjimharris 375230557Sjimharrisint 376230557Sjimharrismac_vnode_check_access(struct ucred *cred, struct vnode *vp, accmode_t accmode) 377230557Sjimharris{ 378230557Sjimharris int error; 379230557Sjimharris 380230557Sjimharris ASSERT_VOP_LOCKED(vp, "mac_vnode_check_access"); 381230557Sjimharris 382230557Sjimharris MAC_POLICY_CHECK(vnode_check_access, cred, vp, vp->v_label, accmode); 383230557Sjimharris MAC_CHECK_PROBE3(vnode_check_access, error, cred, vp, accmode); 384230557Sjimharris 385230557Sjimharris return (error); 386230557Sjimharris} 387230557Sjimharris 388230557SjimharrisMAC_CHECK_PROBE_DEFINE2(vnode_check_chdir, "struct ucred *", 389230557Sjimharris "struct vnode *"); 390230557Sjimharris 391230557Sjimharrisint 392230557Sjimharrismac_vnode_check_chdir(struct ucred *cred, struct vnode *dvp) 393230557Sjimharris{ 394230557Sjimharris int error; 395230557Sjimharris 396230557Sjimharris ASSERT_VOP_LOCKED(dvp, "mac_vnode_check_chdir"); 397230557Sjimharris 398230557Sjimharris MAC_POLICY_CHECK(vnode_check_chdir, cred, dvp, dvp->v_label); 399230557Sjimharris MAC_CHECK_PROBE2(vnode_check_chdir, error, cred, dvp); 400230557Sjimharris 401230557Sjimharris return (error); 402230557Sjimharris} 403230557Sjimharris 404230557SjimharrisMAC_CHECK_PROBE_DEFINE2(vnode_check_chroot, "struct ucred *", 405230557Sjimharris "struct vnode *"); 406230557Sjimharris 407230557Sjimharrisint 408230557Sjimharrismac_vnode_check_chroot(struct ucred *cred, struct vnode *dvp) 409230557Sjimharris{ 410230557Sjimharris int error; 411230557Sjimharris 412230557Sjimharris ASSERT_VOP_LOCKED(dvp, "mac_vnode_check_chroot"); 413230557Sjimharris 414230557Sjimharris MAC_POLICY_CHECK(vnode_check_chroot, cred, dvp, dvp->v_label); 415230557Sjimharris MAC_CHECK_PROBE2(vnode_check_chroot, error, cred, dvp); 416230557Sjimharris 417230557Sjimharris return (error); 418230557Sjimharris} 419230557Sjimharris 420230557SjimharrisMAC_CHECK_PROBE_DEFINE4(vnode_check_create, "struct ucred *", 421230557Sjimharris "struct vnode *", "struct componentname *", "struct vattr *"); 422230557Sjimharris 423230557Sjimharrisint 424230557Sjimharrismac_vnode_check_create(struct ucred *cred, struct vnode *dvp, 425230557Sjimharris struct componentname *cnp, struct vattr *vap) 426230557Sjimharris{ 427230557Sjimharris int error; 428230557Sjimharris 429230557Sjimharris ASSERT_VOP_LOCKED(dvp, "mac_vnode_check_create"); 430230557Sjimharris 431230557Sjimharris MAC_POLICY_CHECK(vnode_check_create, cred, dvp, dvp->v_label, cnp, 432230557Sjimharris vap); 433230557Sjimharris MAC_CHECK_PROBE4(vnode_check_create, error, cred, dvp, cnp, vap); 434230557Sjimharris 435230557Sjimharris return (error); 436230557Sjimharris} 437230557Sjimharris 438230557SjimharrisMAC_CHECK_PROBE_DEFINE3(vnode_check_deleteacl, "struct ucred *", 439230557Sjimharris "struct vnode *", "acl_type_t"); 440230557Sjimharris 441230557Sjimharrisint 442230557Sjimharrismac_vnode_check_deleteacl(struct ucred *cred, struct vnode *vp, 443230557Sjimharris acl_type_t type) 444230557Sjimharris{ 445230557Sjimharris int error; 446230557Sjimharris 447230557Sjimharris ASSERT_VOP_LOCKED(vp, "mac_vnode_check_deleteacl"); 448230557Sjimharris 449230557Sjimharris MAC_POLICY_CHECK(vnode_check_deleteacl, cred, vp, vp->v_label, type); 450230557Sjimharris MAC_CHECK_PROBE3(vnode_check_deleteacl, error, cred, vp, type); 451230557Sjimharris 452230557Sjimharris return (error); 453230557Sjimharris} 454230557Sjimharris 455230557SjimharrisMAC_CHECK_PROBE_DEFINE4(vnode_check_deleteextattr, "struct ucred *", 456230557Sjimharris "struct vnode *", "int", "const char *"); 457230557Sjimharris 458230557Sjimharrisint 459230557Sjimharrismac_vnode_check_deleteextattr(struct ucred *cred, struct vnode *vp, 460230557Sjimharris int attrnamespace, const char *name) 461230557Sjimharris{ 462230557Sjimharris int error; 463230557Sjimharris 464230557Sjimharris ASSERT_VOP_LOCKED(vp, "mac_vnode_check_deleteextattr"); 465230557Sjimharris 466230557Sjimharris MAC_POLICY_CHECK(vnode_check_deleteextattr, cred, vp, vp->v_label, 467230557Sjimharris attrnamespace, name); 468230557Sjimharris MAC_CHECK_PROBE4(vnode_check_deleteextattr, error, cred, vp, 469230557Sjimharris attrnamespace, name); 470230557Sjimharris 471230557Sjimharris return (error); 472230557Sjimharris} 473230557Sjimharris 474230557SjimharrisMAC_CHECK_PROBE_DEFINE3(vnode_check_exec, "struct ucred *", "struct vnode *", 475230557Sjimharris "struct image_params *"); 476230557Sjimharris 477230557Sjimharrisint 478230557Sjimharrismac_vnode_check_exec(struct ucred *cred, struct vnode *vp, 479230557Sjimharris struct image_params *imgp) 480230557Sjimharris{ 481230557Sjimharris int error; 482230557Sjimharris 483230557Sjimharris ASSERT_VOP_LOCKED(vp, "mac_vnode_check_exec"); 484230557Sjimharris 485230557Sjimharris MAC_POLICY_CHECK(vnode_check_exec, cred, vp, vp->v_label, imgp, 486230557Sjimharris imgp->execlabel); 487230557Sjimharris MAC_CHECK_PROBE3(vnode_check_exec, error, cred, vp, imgp); 488230557Sjimharris 489230557Sjimharris return (error); 490230557Sjimharris} 491230557Sjimharris 492230557SjimharrisMAC_CHECK_PROBE_DEFINE3(vnode_check_getacl, "struct ucred *", 493230557Sjimharris "struct vnode *", "acl_type_t"); 494230557Sjimharris 495230557Sjimharrisint 496230557Sjimharrismac_vnode_check_getacl(struct ucred *cred, struct vnode *vp, acl_type_t type) 497230557Sjimharris{ 498230557Sjimharris int error; 499230557Sjimharris 500230557Sjimharris ASSERT_VOP_LOCKED(vp, "mac_vnode_check_getacl"); 501230557Sjimharris 502230557Sjimharris MAC_POLICY_CHECK(vnode_check_getacl, cred, vp, vp->v_label, type); 503230557Sjimharris MAC_CHECK_PROBE3(vnode_check_getacl, error, cred, vp, type); 504230557Sjimharris 505230557Sjimharris return (error); 506230557Sjimharris} 507230557Sjimharris 508230557SjimharrisMAC_CHECK_PROBE_DEFINE4(vnode_check_getextattr, "struct ucred *", 509230557Sjimharris "struct vnode *", "int", "const char *"); 510230557Sjimharris 511230557Sjimharrisint 512230557Sjimharrismac_vnode_check_getextattr(struct ucred *cred, struct vnode *vp, 513230557Sjimharris int attrnamespace, const char *name) 514230557Sjimharris{ 515230557Sjimharris int error; 516230557Sjimharris 517230557Sjimharris ASSERT_VOP_LOCKED(vp, "mac_vnode_check_getextattr"); 518230557Sjimharris 519230557Sjimharris MAC_POLICY_CHECK(vnode_check_getextattr, cred, vp, vp->v_label, 520230557Sjimharris attrnamespace, name); 521230557Sjimharris MAC_CHECK_PROBE4(vnode_check_getextattr, error, cred, vp, 522230557Sjimharris attrnamespace, name); 523230557Sjimharris 524230557Sjimharris return (error); 525230557Sjimharris} 526230557Sjimharris 527230557SjimharrisMAC_CHECK_PROBE_DEFINE4(vnode_check_link, "struct ucred *", "struct vnode *", 528230557Sjimharris "struct vnode *", "struct componentname *"); 529230557Sjimharris 530230557Sjimharrisint 531230557Sjimharrismac_vnode_check_link(struct ucred *cred, struct vnode *dvp, 532230557Sjimharris struct vnode *vp, struct componentname *cnp) 533230557Sjimharris{ 534230557Sjimharris int error; 535230557Sjimharris 536230557Sjimharris ASSERT_VOP_LOCKED(dvp, "mac_vnode_check_link"); 537230557Sjimharris ASSERT_VOP_LOCKED(vp, "mac_vnode_check_link"); 538230557Sjimharris 539230557Sjimharris MAC_POLICY_CHECK(vnode_check_link, cred, dvp, dvp->v_label, vp, 540230557Sjimharris vp->v_label, cnp); 541230557Sjimharris MAC_CHECK_PROBE4(vnode_check_link, error, cred, dvp, vp, cnp); 542230557Sjimharris 543230557Sjimharris return (error); 544230557Sjimharris} 545230557Sjimharris 546230557SjimharrisMAC_CHECK_PROBE_DEFINE3(vnode_check_listextattr, "struct ucred *", 547230557Sjimharris "struct vnode *", "int"); 548230557Sjimharris 549230557Sjimharrisint 550230557Sjimharrismac_vnode_check_listextattr(struct ucred *cred, struct vnode *vp, 551230557Sjimharris int attrnamespace) 552230557Sjimharris{ 553230557Sjimharris int error; 554230557Sjimharris 555230557Sjimharris ASSERT_VOP_LOCKED(vp, "mac_vnode_check_listextattr"); 556230557Sjimharris 557230557Sjimharris MAC_POLICY_CHECK(vnode_check_listextattr, cred, vp, vp->v_label, 558230557Sjimharris attrnamespace); 559230557Sjimharris MAC_CHECK_PROBE3(vnode_check_listextattr, error, cred, vp, 560230557Sjimharris attrnamespace); 561230557Sjimharris 562230557Sjimharris return (error); 563230557Sjimharris} 564230557Sjimharris 565230557SjimharrisMAC_CHECK_PROBE_DEFINE3(vnode_check_lookup, "struct ucred *", 566230557Sjimharris "struct vnode *", "struct componentname *"); 567230557Sjimharris 568230557Sjimharrisint 569230557Sjimharrismac_vnode_check_lookup(struct ucred *cred, struct vnode *dvp, 570230557Sjimharris struct componentname *cnp) 571230557Sjimharris{ 572230557Sjimharris int error; 573230557Sjimharris 574230557Sjimharris ASSERT_VOP_LOCKED(dvp, "mac_vnode_check_lookup"); 575230557Sjimharris 576230557Sjimharris MAC_POLICY_CHECK(vnode_check_lookup, cred, dvp, dvp->v_label, cnp); 577230557Sjimharris MAC_CHECK_PROBE3(vnode_check_lookup, error, cred, dvp, cnp); 578230557Sjimharris 579230557Sjimharris return (error); 580230557Sjimharris} 581230557Sjimharris 582230557SjimharrisMAC_CHECK_PROBE_DEFINE4(vnode_check_mmap, "struct ucred *", "struct vnode *", 583230557Sjimharris "int", "int"); 584230557Sjimharris 585230557Sjimharrisint 586230557Sjimharrismac_vnode_check_mmap(struct ucred *cred, struct vnode *vp, int prot, 587230557Sjimharris int flags) 588230557Sjimharris{ 589230557Sjimharris int error; 590230557Sjimharris 591230557Sjimharris ASSERT_VOP_LOCKED(vp, "mac_vnode_check_mmap"); 592230557Sjimharris 593230557Sjimharris MAC_POLICY_CHECK(vnode_check_mmap, cred, vp, vp->v_label, prot, flags); 594230557Sjimharris MAC_CHECK_PROBE4(vnode_check_mmap, error, cred, vp, prot, flags); 595230557Sjimharris 596230557Sjimharris return (error); 597230557Sjimharris} 598230557Sjimharris 599230557Sjimharrisvoid 600230557Sjimharrismac_vnode_check_mmap_downgrade(struct ucred *cred, struct vnode *vp, 601230557Sjimharris int *prot) 602230557Sjimharris{ 603230557Sjimharris int result = *prot; 604230557Sjimharris 605230557Sjimharris ASSERT_VOP_LOCKED(vp, "mac_vnode_check_mmap_downgrade"); 606230557Sjimharris 607230557Sjimharris MAC_POLICY_PERFORM(vnode_check_mmap_downgrade, cred, vp, vp->v_label, 608230557Sjimharris &result); 609230557Sjimharris 610230557Sjimharris *prot = result; 611230557Sjimharris} 612230557Sjimharris 613MAC_CHECK_PROBE_DEFINE3(vnode_check_mprotect, "struct ucred *", 614 "struct vnode *", "int"); 615 616int 617mac_vnode_check_mprotect(struct ucred *cred, struct vnode *vp, int prot) 618{ 619 int error; 620 621 ASSERT_VOP_LOCKED(vp, "mac_vnode_check_mprotect"); 622 623 MAC_POLICY_CHECK(vnode_check_mprotect, cred, vp, vp->v_label, prot); 624 MAC_CHECK_PROBE3(vnode_check_mprotect, error, cred, vp, prot); 625 626 return (error); 627} 628 629MAC_CHECK_PROBE_DEFINE3(vnode_check_open, "struct ucred *", "struct vnode *", 630 "accmode_t"); 631 632int 633mac_vnode_check_open(struct ucred *cred, struct vnode *vp, accmode_t accmode) 634{ 635 int error; 636 637 ASSERT_VOP_LOCKED(vp, "mac_vnode_check_open"); 638 639 MAC_POLICY_CHECK(vnode_check_open, cred, vp, vp->v_label, accmode); 640 MAC_CHECK_PROBE3(vnode_check_open, error, cred, vp, accmode); 641 642 return (error); 643} 644 645MAC_CHECK_PROBE_DEFINE3(vnode_check_poll, "struct ucred *", "struct ucred *", 646 "struct vnode *"); 647 648int 649mac_vnode_check_poll(struct ucred *active_cred, struct ucred *file_cred, 650 struct vnode *vp) 651{ 652 int error; 653 654 ASSERT_VOP_LOCKED(vp, "mac_vnode_check_poll"); 655 656 MAC_POLICY_CHECK(vnode_check_poll, active_cred, file_cred, vp, 657 vp->v_label); 658 MAC_CHECK_PROBE3(vnode_check_poll, error, active_cred, file_cred, 659 vp); 660 661 return (error); 662} 663 664MAC_CHECK_PROBE_DEFINE3(vnode_check_read, "struct ucred *", "struct ucred *", 665 "struct vnode *"); 666 667int 668mac_vnode_check_read(struct ucred *active_cred, struct ucred *file_cred, 669 struct vnode *vp) 670{ 671 int error; 672 673 ASSERT_VOP_LOCKED(vp, "mac_vnode_check_read"); 674 675 MAC_POLICY_CHECK(vnode_check_read, active_cred, file_cred, vp, 676 vp->v_label); 677 MAC_CHECK_PROBE3(vnode_check_read, error, active_cred, file_cred, 678 vp); 679 680 return (error); 681} 682 683MAC_CHECK_PROBE_DEFINE2(vnode_check_readdir, "struct ucred *", 684 "struct vnode *"); 685 686int 687mac_vnode_check_readdir(struct ucred *cred, struct vnode *dvp) 688{ 689 int error; 690 691 ASSERT_VOP_LOCKED(dvp, "mac_vnode_check_readdir"); 692 693 MAC_POLICY_CHECK(vnode_check_readdir, cred, dvp, dvp->v_label); 694 MAC_CHECK_PROBE2(vnode_check_readdir, error, cred, dvp); 695 696 return (error); 697} 698 699MAC_CHECK_PROBE_DEFINE2(vnode_check_readlink, "struct ucred *", 700 "struct vnode *"); 701 702int 703mac_vnode_check_readlink(struct ucred *cred, struct vnode *vp) 704{ 705 int error; 706 707 ASSERT_VOP_LOCKED(vp, "mac_vnode_check_readlink"); 708 709 MAC_POLICY_CHECK(vnode_check_readlink, cred, vp, vp->v_label); 710 MAC_CHECK_PROBE2(vnode_check_readlink, error, cred, vp); 711 712 return (error); 713} 714 715MAC_CHECK_PROBE_DEFINE3(vnode_check_relabel, "struct ucred *", 716 "struct vnode *", "struct label *"); 717 718static int 719mac_vnode_check_relabel(struct ucred *cred, struct vnode *vp, 720 struct label *newlabel) 721{ 722 int error; 723 724 ASSERT_VOP_LOCKED(vp, "mac_vnode_check_relabel"); 725 726 MAC_POLICY_CHECK(vnode_check_relabel, cred, vp, vp->v_label, newlabel); 727 MAC_CHECK_PROBE3(vnode_check_relabel, error, cred, vp, newlabel); 728 729 return (error); 730} 731 732MAC_CHECK_PROBE_DEFINE4(vnode_check_rename_from, "struct ucred *", 733 "struct vnode *", "struct vnode *", "struct componentname *"); 734 735int 736mac_vnode_check_rename_from(struct ucred *cred, struct vnode *dvp, 737 struct vnode *vp, struct componentname *cnp) 738{ 739 int error; 740 741 ASSERT_VOP_LOCKED(dvp, "mac_vnode_check_rename_from"); 742 ASSERT_VOP_LOCKED(vp, "mac_vnode_check_rename_from"); 743 744 MAC_POLICY_CHECK(vnode_check_rename_from, cred, dvp, dvp->v_label, vp, 745 vp->v_label, cnp); 746 MAC_CHECK_PROBE4(vnode_check_rename_from, error, cred, dvp, vp, cnp); 747 748 return (error); 749} 750 751MAC_CHECK_PROBE_DEFINE4(vnode_check_rename_to, "struct ucred *", 752 "struct vnode *", "struct vnode *", "struct componentname *"); 753 754int 755mac_vnode_check_rename_to(struct ucred *cred, struct vnode *dvp, 756 struct vnode *vp, int samedir, struct componentname *cnp) 757{ 758 int error; 759 760 ASSERT_VOP_LOCKED(dvp, "mac_vnode_check_rename_to"); 761 ASSERT_VOP_LOCKED(vp, "mac_vnode_check_rename_to"); 762 763 MAC_POLICY_CHECK(vnode_check_rename_to, cred, dvp, dvp->v_label, vp, 764 vp != NULL ? vp->v_label : NULL, samedir, cnp); 765 MAC_CHECK_PROBE4(vnode_check_rename_to, error, cred, dvp, vp, cnp); 766 return (error); 767} 768 769MAC_CHECK_PROBE_DEFINE2(vnode_check_revoke, "struct ucred *", 770 "struct vnode *"); 771 772int 773mac_vnode_check_revoke(struct ucred *cred, struct vnode *vp) 774{ 775 int error; 776 777 ASSERT_VOP_LOCKED(vp, "mac_vnode_check_revoke"); 778 779 MAC_POLICY_CHECK(vnode_check_revoke, cred, vp, vp->v_label); 780 MAC_CHECK_PROBE2(vnode_check_revoke, error, cred, vp); 781 782 return (error); 783} 784 785MAC_CHECK_PROBE_DEFINE4(vnode_check_setacl, "struct ucred *", 786 "struct vnode *", "acl_type_t", "struct acl *"); 787 788int 789mac_vnode_check_setacl(struct ucred *cred, struct vnode *vp, acl_type_t type, 790 struct acl *acl) 791{ 792 int error; 793 794 ASSERT_VOP_LOCKED(vp, "mac_vnode_check_setacl"); 795 796 MAC_POLICY_CHECK(vnode_check_setacl, cred, vp, vp->v_label, type, acl); 797 MAC_CHECK_PROBE4(vnode_check_setacl, error, cred, vp, type, acl); 798 799 return (error); 800} 801 802MAC_CHECK_PROBE_DEFINE4(vnode_check_setextattr, "struct ucred *", 803 "struct vnode *", "int", "const char *"); 804 805int 806mac_vnode_check_setextattr(struct ucred *cred, struct vnode *vp, 807 int attrnamespace, const char *name) 808{ 809 int error; 810 811 ASSERT_VOP_LOCKED(vp, "mac_vnode_check_setextattr"); 812 813 MAC_POLICY_CHECK(vnode_check_setextattr, cred, vp, vp->v_label, 814 attrnamespace, name); 815 MAC_CHECK_PROBE4(vnode_check_setextattr, error, cred, vp, 816 attrnamespace, name); 817 818 return (error); 819} 820 821MAC_CHECK_PROBE_DEFINE3(vnode_check_setflags, "struct ucred *", 822 "struct vnode *", "u_long"); 823 824int 825mac_vnode_check_setflags(struct ucred *cred, struct vnode *vp, u_long flags) 826{ 827 int error; 828 829 ASSERT_VOP_LOCKED(vp, "mac_vnode_check_setflags"); 830 831 MAC_POLICY_CHECK(vnode_check_setflags, cred, vp, vp->v_label, flags); 832 MAC_CHECK_PROBE3(vnode_check_setflags, error, cred, vp, flags); 833 834 return (error); 835} 836 837MAC_CHECK_PROBE_DEFINE3(vnode_check_setmode, "struct ucred *", 838 "struct vnode *", "mode_t"); 839 840int 841mac_vnode_check_setmode(struct ucred *cred, struct vnode *vp, mode_t mode) 842{ 843 int error; 844 845 ASSERT_VOP_LOCKED(vp, "mac_vnode_check_setmode"); 846 847 MAC_POLICY_CHECK(vnode_check_setmode, cred, vp, vp->v_label, mode); 848 MAC_CHECK_PROBE3(vnode_check_setmode, error, cred, vp, mode); 849 850 return (error); 851} 852 853MAC_CHECK_PROBE_DEFINE4(vnode_check_setowner, "struct ucred *", 854 "struct vnode *", "uid_t", "gid_t"); 855 856int 857mac_vnode_check_setowner(struct ucred *cred, struct vnode *vp, uid_t uid, 858 gid_t gid) 859{ 860 int error; 861 862 ASSERT_VOP_LOCKED(vp, "mac_vnode_check_setowner"); 863 864 MAC_POLICY_CHECK(vnode_check_setowner, cred, vp, vp->v_label, uid, gid); 865 MAC_CHECK_PROBE4(vnode_check_setowner, error, cred, vp, uid, gid); 866 867 return (error); 868} 869 870MAC_CHECK_PROBE_DEFINE4(vnode_check_setutimes, "struct ucred *", 871 "struct vnode *", "struct timespec *", "struct timespec *"); 872 873int 874mac_vnode_check_setutimes(struct ucred *cred, struct vnode *vp, 875 struct timespec atime, struct timespec mtime) 876{ 877 int error; 878 879 ASSERT_VOP_LOCKED(vp, "mac_vnode_check_setutimes"); 880 881 MAC_POLICY_CHECK(vnode_check_setutimes, cred, vp, vp->v_label, atime, 882 mtime); 883 MAC_CHECK_PROBE4(vnode_check_setutimes, error, cred, vp, &atime, 884 &mtime); 885 886 return (error); 887} 888 889MAC_CHECK_PROBE_DEFINE3(vnode_check_stat, "struct ucred *", "struct ucred *", 890 "struct vnode *"); 891 892int 893mac_vnode_check_stat(struct ucred *active_cred, struct ucred *file_cred, 894 struct vnode *vp) 895{ 896 int error; 897 898 ASSERT_VOP_LOCKED(vp, "mac_vnode_check_stat"); 899 900 MAC_POLICY_CHECK(vnode_check_stat, active_cred, file_cred, vp, 901 vp->v_label); 902 MAC_CHECK_PROBE3(vnode_check_stat, error, active_cred, file_cred, 903 vp); 904 905 return (error); 906} 907 908MAC_CHECK_PROBE_DEFINE4(vnode_check_unlink, "struct ucred *", 909 "struct vnode *", "struct vnode *", "struct componentname *"); 910 911int 912mac_vnode_check_unlink(struct ucred *cred, struct vnode *dvp, 913 struct vnode *vp, struct componentname *cnp) 914{ 915 int error; 916 917 ASSERT_VOP_LOCKED(dvp, "mac_vnode_check_unlink"); 918 ASSERT_VOP_LOCKED(vp, "mac_vnode_check_unlink"); 919 920 MAC_POLICY_CHECK(vnode_check_unlink, cred, dvp, dvp->v_label, vp, 921 vp->v_label, cnp); 922 MAC_CHECK_PROBE4(vnode_check_unlink, error, cred, dvp, vp, cnp); 923 924 return (error); 925} 926 927MAC_CHECK_PROBE_DEFINE3(vnode_check_write, "struct ucred *", 928 "struct ucred *", "struct vnode *"); 929 930int 931mac_vnode_check_write(struct ucred *active_cred, struct ucred *file_cred, 932 struct vnode *vp) 933{ 934 int error; 935 936 ASSERT_VOP_LOCKED(vp, "mac_vnode_check_write"); 937 938 MAC_POLICY_CHECK(vnode_check_write, active_cred, file_cred, vp, 939 vp->v_label); 940 MAC_CHECK_PROBE3(vnode_check_write, error, active_cred, file_cred, 941 vp); 942 943 return (error); 944} 945 946void 947mac_vnode_relabel(struct ucred *cred, struct vnode *vp, 948 struct label *newlabel) 949{ 950 951 MAC_POLICY_PERFORM(vnode_relabel, cred, vp, vp->v_label, newlabel); 952} 953 954void 955mac_mount_create(struct ucred *cred, struct mount *mp) 956{ 957 958 MAC_POLICY_PERFORM(mount_create, cred, mp, mp->mnt_label); 959} 960 961MAC_CHECK_PROBE_DEFINE2(mount_check_stat, "struct ucred *", 962 "struct mount *"); 963 964int 965mac_mount_check_stat(struct ucred *cred, struct mount *mount) 966{ 967 int error; 968 969 MAC_POLICY_CHECK_NOSLEEP(mount_check_stat, cred, mount, mount->mnt_label); 970 MAC_CHECK_PROBE2(mount_check_stat, error, cred, mount); 971 972 return (error); 973} 974 975void 976mac_devfs_create_device(struct ucred *cred, struct mount *mp, 977 struct cdev *dev, struct devfs_dirent *de) 978{ 979 980 MAC_POLICY_PERFORM_NOSLEEP(devfs_create_device, cred, mp, dev, de, 981 de->de_label); 982} 983 984void 985mac_devfs_create_symlink(struct ucred *cred, struct mount *mp, 986 struct devfs_dirent *dd, struct devfs_dirent *de) 987{ 988 989 MAC_POLICY_PERFORM_NOSLEEP(devfs_create_symlink, cred, mp, dd, 990 dd->de_label, de, de->de_label); 991} 992 993void 994mac_devfs_create_directory(struct mount *mp, char *dirname, int dirnamelen, 995 struct devfs_dirent *de) 996{ 997 998 MAC_POLICY_PERFORM_NOSLEEP(devfs_create_directory, mp, dirname, 999 dirnamelen, de, de->de_label); 1000} 1001 1002/* 1003 * Implementation of VOP_SETLABEL() that relies on extended attributes to 1004 * store label data. Can be referenced by filesystems supporting extended 1005 * attributes. 1006 */ 1007int 1008vop_stdsetlabel_ea(struct vop_setlabel_args *ap) 1009{ 1010 struct vnode *vp = ap->a_vp; 1011 struct label *intlabel = ap->a_label; 1012 int error; 1013 1014 ASSERT_VOP_LOCKED(vp, "vop_stdsetlabel_ea"); 1015 1016 if ((vp->v_mount->mnt_flag & MNT_MULTILABEL) == 0) 1017 return (EOPNOTSUPP); 1018 1019 error = mac_vnode_setlabel_extattr(ap->a_cred, vp, intlabel); 1020 if (error) 1021 return (error); 1022 1023 mac_vnode_relabel(ap->a_cred, vp, intlabel); 1024 1025 return (0); 1026} 1027 1028int 1029vn_setlabel(struct vnode *vp, struct label *intlabel, struct ucred *cred) 1030{ 1031 int error; 1032 1033 if (vp->v_mount == NULL) { 1034 /* printf("vn_setlabel: null v_mount\n"); */ 1035 if (vp->v_type != VNON) 1036 printf("vn_setlabel: null v_mount with non-VNON\n"); 1037 return (EBADF); 1038 } 1039 1040 if ((vp->v_mount->mnt_flag & MNT_MULTILABEL) == 0) 1041 return (EOPNOTSUPP); 1042 1043 /* 1044 * Multi-phase commit. First check the policies to confirm the 1045 * change is OK. Then commit via the filesystem. Finally, update 1046 * the actual vnode label. 1047 * 1048 * Question: maybe the filesystem should update the vnode at the end 1049 * as part of VOP_SETLABEL()? 1050 */ 1051 error = mac_vnode_check_relabel(cred, vp, intlabel); 1052 if (error) 1053 return (error); 1054 1055 /* 1056 * VADMIN provides the opportunity for the filesystem to make 1057 * decisions about who is and is not able to modify labels and 1058 * protections on files. This might not be right. We can't assume 1059 * VOP_SETLABEL() will do it, because we might implement that as part 1060 * of vop_stdsetlabel_ea(). 1061 */ 1062 error = VOP_ACCESS(vp, VADMIN, cred, curthread); 1063 if (error) 1064 return (error); 1065 1066 error = VOP_SETLABEL(vp, intlabel, cred, curthread); 1067 if (error) 1068 return (error); 1069 1070 return (0); 1071} 1072