mac_policy.h revision 113681
1/*- 2 * Copyright (c) 1999, 2000, 2001, 2002 Robert N. M. Watson 3 * Copyright (c) 2001, 2002, 2003 Networks Associates Technology, Inc. 4 * All rights reserved. 5 * 6 * This software was developed by Robert Watson for the TrustedBSD Project. 7 * 8 * This software was developed for the FreeBSD Project in part by Network 9 * Associates Laboratories, the Security Research Division of Network 10 * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), 11 * as part of the DARPA CHATS research program. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * $FreeBSD: head/sys/security/mac/mac_policy.h 113681 2003-04-18 19:57:37Z rwatson $ 35 */ 36/* 37 * Kernel interface for MAC policy modules. 38 */ 39#ifndef _SYS_MAC_POLICY_H 40#define _SYS_MAC_POLICY_H 41 42/*- 43 * Pluggable access control policy definition structure. 44 * 45 * List of operations that are performed as part of the implementation 46 * of a MAC policy. Policy implementors declare operations with a 47 * mac_policy_ops structure, and using the MAC_POLICY_SET() macro. 48 * If an entry point is not declared, then then the policy will be ignored 49 * during evaluation of that event or check. 50 * 51 * Operations are sorted first by general class of operation, then 52 * alphabetically. 53 */ 54struct mac_policy_conf; 55struct mac_policy_ops { 56 /* 57 * Policy module operations. 58 */ 59 void (*mpo_destroy)(struct mac_policy_conf *mpc); 60 void (*mpo_init)(struct mac_policy_conf *mpc); 61 62 /* 63 * General policy-directed security system call so that policies 64 * may implement new services without reserving explicit 65 * system call numbers. 66 */ 67 int (*mpo_syscall)(struct thread *td, int call, void *arg); 68 69 /* 70 * Label operations. 71 */ 72 void (*mpo_init_bpfdesc_label)(struct label *label); 73 void (*mpo_init_cred_label)(struct label *label); 74 void (*mpo_init_devfsdirent_label)(struct label *label); 75 void (*mpo_init_ifnet_label)(struct label *label); 76 int (*mpo_init_ipq_label)(struct label *label, int flag); 77 int (*mpo_init_mbuf_label)(struct label *label, int flag); 78 void (*mpo_init_mount_label)(struct label *label); 79 void (*mpo_init_mount_fs_label)(struct label *label); 80 int (*mpo_init_socket_label)(struct label *label, int flag); 81 int (*mpo_init_socket_peer_label)(struct label *label, int flag); 82 void (*mpo_init_pipe_label)(struct label *label); 83 void (*mpo_init_proc_label)(struct label *label); 84 void (*mpo_init_vnode_label)(struct label *label); 85 void (*mpo_destroy_bpfdesc_label)(struct label *label); 86 void (*mpo_destroy_cred_label)(struct label *label); 87 void (*mpo_destroy_devfsdirent_label)(struct label *label); 88 void (*mpo_destroy_ifnet_label)(struct label *label); 89 void (*mpo_destroy_ipq_label)(struct label *label); 90 void (*mpo_destroy_mbuf_label)(struct label *label); 91 void (*mpo_destroy_mount_label)(struct label *label); 92 void (*mpo_destroy_mount_fs_label)(struct label *label); 93 void (*mpo_destroy_socket_label)(struct label *label); 94 void (*mpo_destroy_socket_peer_label)(struct label *label); 95 void (*mpo_destroy_pipe_label)(struct label *label); 96 void (*mpo_destroy_proc_label)(struct label *label); 97 void (*mpo_destroy_vnode_label)(struct label *label); 98 void (*mpo_copy_mbuf_label)(struct label *src, 99 struct label *dest); 100 void (*mpo_copy_pipe_label)(struct label *src, 101 struct label *dest); 102 void (*mpo_copy_vnode_label)(struct label *src, 103 struct label *dest); 104 int (*mpo_externalize_cred_label)(struct label *label, 105 char *element_name, char *buffer, size_t buflen, 106 size_t *len, int *claimed); 107 int (*mpo_externalize_ifnet_label)(struct label *label, 108 char *element_name, char *buffer, size_t buflen, 109 size_t *len, int *claimed); 110 int (*mpo_externalize_pipe_label)(struct label *label, 111 char *element_name, char *buffer, size_t buflen, 112 size_t *len, int *claimed); 113 int (*mpo_externalize_socket_label)(struct label *label, 114 char *element_name, char *buffer, size_t buflen, 115 size_t *len, int *claimed); 116 int (*mpo_externalize_socket_peer_label)(struct label *label, 117 char *element_name, char *buffer, size_t buflen, 118 size_t *len, int *claimed); 119 int (*mpo_externalize_vnode_label)(struct label *label, 120 char *element_name, char *buffer, size_t buflen, 121 size_t *len, int *claimed); 122 int (*mpo_internalize_cred_label)(struct label *label, 123 char *element_name, char *element_data, int *claimed); 124 int (*mpo_internalize_ifnet_label)(struct label *label, 125 char *element_name, char *element_data, int *claimed); 126 int (*mpo_internalize_pipe_label)(struct label *label, 127 char *element_name, char *element_data, int *claimed); 128 int (*mpo_internalize_socket_label)(struct label *label, 129 char *element_name, char *element_data, int *claimed); 130 int (*mpo_internalize_vnode_label)(struct label *label, 131 char *element_name, char *element_data, int *claimed); 132 133 /* 134 * Labeling event operations: file system objects, and things that 135 * look a lot like file system objects. 136 */ 137 void (*mpo_associate_vnode_devfs)(struct mount *mp, 138 struct label *fslabel, struct devfs_dirent *de, 139 struct label *delabel, struct vnode *vp, 140 struct label *vlabel); 141 int (*mpo_associate_vnode_extattr)(struct mount *mp, 142 struct label *fslabel, struct vnode *vp, 143 struct label *vlabel); 144 void (*mpo_associate_vnode_singlelabel)(struct mount *mp, 145 struct label *fslabel, struct vnode *vp, 146 struct label *vlabel); 147 void (*mpo_create_devfs_device)(struct mount *mp, dev_t dev, 148 struct devfs_dirent *de, struct label *label); 149 void (*mpo_create_devfs_directory)(struct mount *mp, char *dirname, 150 int dirnamelen, struct devfs_dirent *de, 151 struct label *label); 152 void (*mpo_create_devfs_symlink)(struct ucred *cred, 153 struct mount *mp, struct devfs_dirent *dd, 154 struct label *ddlabel, struct devfs_dirent *de, 155 struct label *delabel); 156 int (*mpo_create_vnode_extattr)(struct ucred *cred, 157 struct mount *mp, struct label *fslabel, 158 struct vnode *dvp, struct label *dlabel, 159 struct vnode *vp, struct label *vlabel, 160 struct componentname *cnp); 161 void (*mpo_create_mount)(struct ucred *cred, struct mount *mp, 162 struct label *mntlabel, struct label *fslabel); 163 void (*mpo_create_root_mount)(struct ucred *cred, struct mount *mp, 164 struct label *mountlabel, struct label *fslabel); 165 void (*mpo_relabel_vnode)(struct ucred *cred, struct vnode *vp, 166 struct label *vnodelabel, struct label *label); 167 int (*mpo_setlabel_vnode_extattr)(struct ucred *cred, 168 struct vnode *vp, struct label *vlabel, 169 struct label *intlabel); 170 void (*mpo_update_devfsdirent)(struct mount *mp, 171 struct devfs_dirent *devfs_dirent, 172 struct label *direntlabel, struct vnode *vp, 173 struct label *vnodelabel); 174 175 /* 176 * Labeling event operations: IPC objects. 177 */ 178 void (*mpo_create_mbuf_from_socket)(struct socket *so, 179 struct label *socketlabel, struct mbuf *m, 180 struct label *mbuflabel); 181 void (*mpo_create_socket)(struct ucred *cred, struct socket *so, 182 struct label *socketlabel); 183 void (*mpo_create_socket_from_socket)(struct socket *oldsocket, 184 struct label *oldsocketlabel, struct socket *newsocket, 185 struct label *newsocketlabel); 186 void (*mpo_relabel_socket)(struct ucred *cred, struct socket *so, 187 struct label *oldlabel, struct label *newlabel); 188 void (*mpo_relabel_pipe)(struct ucred *cred, struct pipe *pipe, 189 struct label *oldlabel, struct label *newlabel); 190 void (*mpo_set_socket_peer_from_mbuf)(struct mbuf *mbuf, 191 struct label *mbuflabel, struct socket *so, 192 struct label *socketpeerlabel); 193 void (*mpo_set_socket_peer_from_socket)(struct socket *oldsocket, 194 struct label *oldsocketlabel, struct socket *newsocket, 195 struct label *newsocketpeerlabel); 196 void (*mpo_create_pipe)(struct ucred *cred, struct pipe *pipe, 197 struct label *pipelabel); 198 199 /* 200 * Labeling event operations: network objects. 201 */ 202 void (*mpo_create_bpfdesc)(struct ucred *cred, struct bpf_d *bpf_d, 203 struct label *bpflabel); 204 void (*mpo_create_ifnet)(struct ifnet *ifnet, 205 struct label *ifnetlabel); 206 void (*mpo_create_ipq)(struct mbuf *fragment, 207 struct label *fragmentlabel, struct ipq *ipq, 208 struct label *ipqlabel); 209 void (*mpo_create_datagram_from_ipq) 210 (struct ipq *ipq, struct label *ipqlabel, 211 struct mbuf *datagram, struct label *datagramlabel); 212 void (*mpo_create_fragment)(struct mbuf *datagram, 213 struct label *datagramlabel, struct mbuf *fragment, 214 struct label *fragmentlabel); 215 void (*mpo_create_mbuf_from_mbuf)(struct mbuf *oldmbuf, 216 struct label *oldlabel, struct mbuf *newmbuf, 217 struct label *newlabel); 218 void (*mpo_create_mbuf_linklayer)(struct ifnet *ifnet, 219 struct label *ifnetlabel, struct mbuf *mbuf, 220 struct label *mbuflabel); 221 void (*mpo_create_mbuf_from_bpfdesc)(struct bpf_d *bpf_d, 222 struct label *bpflabel, struct mbuf *mbuf, 223 struct label *mbuflabel); 224 void (*mpo_create_mbuf_from_ifnet)(struct ifnet *ifnet, 225 struct label *ifnetlabel, struct mbuf *mbuf, 226 struct label *mbuflabel); 227 void (*mpo_create_mbuf_multicast_encap)(struct mbuf *oldmbuf, 228 struct label *oldmbuflabel, struct ifnet *ifnet, 229 struct label *ifnetlabel, struct mbuf *newmbuf, 230 struct label *newmbuflabel); 231 void (*mpo_create_mbuf_netlayer)(struct mbuf *oldmbuf, 232 struct label *oldmbuflabel, struct mbuf *newmbuf, 233 struct label *newmbuflabel); 234 int (*mpo_fragment_match)(struct mbuf *fragment, 235 struct label *fragmentlabel, struct ipq *ipq, 236 struct label *ipqlabel); 237 void (*mpo_relabel_ifnet)(struct ucred *cred, struct ifnet *ifnet, 238 struct label *ifnetlabel, struct label *newlabel); 239 void (*mpo_update_ipq)(struct mbuf *fragment, 240 struct label *fragmentlabel, struct ipq *ipq, 241 struct label *ipqlabel); 242 243 /* 244 * Labeling event operations: processes. 245 */ 246 void (*mpo_create_cred)(struct ucred *parent_cred, 247 struct ucred *child_cred); 248 void (*mpo_execve_transition)(struct ucred *old, struct ucred *new, 249 struct vnode *vp, struct label *vnodelabel, 250 struct label *interpvnodelabel, 251 struct image_params *imgp, struct label *execlabel); 252 int (*mpo_execve_will_transition)(struct ucred *old, 253 struct vnode *vp, struct label *vnodelabel, 254 struct label *interpvnodelabel, 255 struct image_params *imgp, struct label *execlabel); 256 void (*mpo_create_proc0)(struct ucred *cred); 257 void (*mpo_create_proc1)(struct ucred *cred); 258 void (*mpo_relabel_cred)(struct ucred *cred, 259 struct label *newlabel); 260 void (*mpo_thread_userret)(struct thread *thread); 261 262 /* 263 * Access control checks. 264 */ 265 int (*mpo_check_bpfdesc_receive)(struct bpf_d *bpf_d, 266 struct label *bpflabel, struct ifnet *ifnet, 267 struct label *ifnetlabel); 268 int (*mpo_check_cred_relabel)(struct ucred *cred, 269 struct label *newlabel); 270 int (*mpo_check_cred_visible)(struct ucred *u1, struct ucred *u2); 271 int (*mpo_check_ifnet_relabel)(struct ucred *cred, 272 struct ifnet *ifnet, struct label *ifnetlabel, 273 struct label *newlabel); 274 int (*mpo_check_ifnet_transmit)(struct ifnet *ifnet, 275 struct label *ifnetlabel, struct mbuf *m, 276 struct label *mbuflabel); 277 int (*mpo_check_kenv_dump)(struct ucred *cred); 278 int (*mpo_check_kenv_get)(struct ucred *cred, char *name); 279 int (*mpo_check_kenv_set)(struct ucred *cred, char *name, 280 char *value); 281 int (*mpo_check_kenv_unset)(struct ucred *cred, char *name); 282 int (*mpo_check_kld_load)(struct ucred *cred, struct vnode *vp, 283 struct label *vlabel); 284 int (*mpo_check_kld_stat)(struct ucred *cred); 285 int (*mpo_check_kld_unload)(struct ucred *cred); 286 int (*mpo_check_mount_stat)(struct ucred *cred, struct mount *mp, 287 struct label *mntlabel); 288 int (*mpo_check_pipe_ioctl)(struct ucred *cred, struct pipe *pipe, 289 struct label *pipelabel, unsigned long cmd, void *data); 290 int (*mpo_check_pipe_poll)(struct ucred *cred, struct pipe *pipe, 291 struct label *pipelabel); 292 int (*mpo_check_pipe_read)(struct ucred *cred, struct pipe *pipe, 293 struct label *pipelabel); 294 int (*mpo_check_pipe_relabel)(struct ucred *cred, 295 struct pipe *pipe, struct label *pipelabel, 296 struct label *newlabel); 297 int (*mpo_check_pipe_stat)(struct ucred *cred, struct pipe *pipe, 298 struct label *pipelabel); 299 int (*mpo_check_pipe_write)(struct ucred *cred, struct pipe *pipe, 300 struct label *pipelabel); 301 int (*mpo_check_proc_debug)(struct ucred *cred, 302 struct proc *proc); 303 int (*mpo_check_proc_sched)(struct ucred *cred, 304 struct proc *proc); 305 int (*mpo_check_proc_signal)(struct ucred *cred, 306 struct proc *proc, int signum); 307 int (*mpo_check_socket_bind)(struct ucred *cred, 308 struct socket *so, struct label *socketlabel, 309 struct sockaddr *sockaddr); 310 int (*mpo_check_socket_connect)(struct ucred *cred, 311 struct socket *so, struct label *socketlabel, 312 struct sockaddr *sockaddr); 313 int (*mpo_check_socket_deliver)(struct socket *so, 314 struct label *socketlabel, struct mbuf *m, 315 struct label *mbuflabel); 316 int (*mpo_check_socket_listen)(struct ucred *cred, 317 struct socket *so, struct label *socketlabel); 318 int (*mpo_check_socket_receive)(struct ucred *cred, 319 struct socket *so, struct label *socketlabel); 320 int (*mpo_check_socket_relabel)(struct ucred *cred, 321 struct socket *so, struct label *socketlabel, 322 struct label *newlabel); 323 int (*mpo_check_socket_send)(struct ucred *cred, 324 struct socket *so, struct label *socketlabel); 325 int (*mpo_check_socket_visible)(struct ucred *cred, 326 struct socket *so, struct label *socketlabel); 327 int (*mpo_check_sysarch_ioperm)(struct ucred *cred); 328 int (*mpo_check_system_acct)(struct ucred *cred, 329 struct vnode *vp, struct label *vlabel); 330 int (*mpo_check_system_nfsd)(struct ucred *cred); 331 int (*mpo_check_system_reboot)(struct ucred *cred, int howto); 332 int (*mpo_check_system_settime)(struct ucred *cred); 333 int (*mpo_check_system_swapon)(struct ucred *cred, 334 struct vnode *vp, struct label *label); 335 int (*mpo_check_system_swapoff)(struct ucred *cred, 336 struct vnode *vp, struct label *label); 337 int (*mpo_check_system_sysctl)(struct ucred *cred, int *name, 338 u_int namelen, void *old, size_t *oldlenp, int inkernel, 339 void *new, size_t newlen); 340 int (*mpo_check_vnode_access)(struct ucred *cred, 341 struct vnode *vp, struct label *label, int acc_mode); 342 int (*mpo_check_vnode_chdir)(struct ucred *cred, 343 struct vnode *dvp, struct label *dlabel); 344 int (*mpo_check_vnode_chroot)(struct ucred *cred, 345 struct vnode *dvp, struct label *dlabel); 346 int (*mpo_check_vnode_create)(struct ucred *cred, 347 struct vnode *dvp, struct label *dlabel, 348 struct componentname *cnp, struct vattr *vap); 349 int (*mpo_check_vnode_delete)(struct ucred *cred, 350 struct vnode *dvp, struct label *dlabel, 351 struct vnode *vp, struct label *label, 352 struct componentname *cnp); 353 int (*mpo_check_vnode_deleteacl)(struct ucred *cred, 354 struct vnode *vp, struct label *label, acl_type_t type); 355 int (*mpo_check_vnode_exec)(struct ucred *cred, struct vnode *vp, 356 struct label *label, struct image_params *imgp, 357 struct label *execlabel); 358 int (*mpo_check_vnode_getacl)(struct ucred *cred, 359 struct vnode *vp, struct label *label, acl_type_t type); 360 int (*mpo_check_vnode_getextattr)(struct ucred *cred, 361 struct vnode *vp, struct label *label, int attrnamespace, 362 const char *name, struct uio *uio); 363 int (*mpo_check_vnode_link)(struct ucred *cred, struct vnode *dvp, 364 struct label *dlabel, struct vnode *vp, 365 struct label *label, struct componentname *cnp); 366 int (*mpo_check_vnode_lookup)(struct ucred *cred, 367 struct vnode *dvp, struct label *dlabel, 368 struct componentname *cnp); 369 int (*mpo_check_vnode_mmap)(struct ucred *cred, struct vnode *vp, 370 struct label *label, int prot); 371 void (*mpo_check_vnode_mmap_downgrade)(struct ucred *cred, 372 struct vnode *vp, struct label *label, int *prot); 373 int (*mpo_check_vnode_mprotect)(struct ucred *cred, 374 struct vnode *vp, struct label *label, int prot); 375 int (*mpo_check_vnode_open)(struct ucred *cred, struct vnode *vp, 376 struct label *label, int acc_mode); 377 int (*mpo_check_vnode_poll)(struct ucred *active_cred, 378 struct ucred *file_cred, struct vnode *vp, 379 struct label *label); 380 int (*mpo_check_vnode_read)(struct ucred *active_cred, 381 struct ucred *file_cred, struct vnode *vp, 382 struct label *label); 383 int (*mpo_check_vnode_readdir)(struct ucred *cred, 384 struct vnode *dvp, struct label *dlabel); 385 int (*mpo_check_vnode_readlink)(struct ucred *cred, 386 struct vnode *vp, struct label *label); 387 int (*mpo_check_vnode_relabel)(struct ucred *cred, 388 struct vnode *vp, struct label *vnodelabel, 389 struct label *newlabel); 390 int (*mpo_check_vnode_rename_from)(struct ucred *cred, 391 struct vnode *dvp, struct label *dlabel, struct vnode *vp, 392 struct label *label, struct componentname *cnp); 393 int (*mpo_check_vnode_rename_to)(struct ucred *cred, 394 struct vnode *dvp, struct label *dlabel, struct vnode *vp, 395 struct label *label, int samedir, 396 struct componentname *cnp); 397 int (*mpo_check_vnode_revoke)(struct ucred *cred, 398 struct vnode *vp, struct label *label); 399 int (*mpo_check_vnode_setacl)(struct ucred *cred, 400 struct vnode *vp, struct label *label, acl_type_t type, 401 struct acl *acl); 402 int (*mpo_check_vnode_setextattr)(struct ucred *cred, 403 struct vnode *vp, struct label *label, int attrnamespace, 404 const char *name, struct uio *uio); 405 int (*mpo_check_vnode_setflags)(struct ucred *cred, 406 struct vnode *vp, struct label *label, u_long flags); 407 int (*mpo_check_vnode_setmode)(struct ucred *cred, 408 struct vnode *vp, struct label *label, mode_t mode); 409 int (*mpo_check_vnode_setowner)(struct ucred *cred, 410 struct vnode *vp, struct label *label, uid_t uid, 411 gid_t gid); 412 int (*mpo_check_vnode_setutimes)(struct ucred *cred, 413 struct vnode *vp, struct label *label, 414 struct timespec atime, struct timespec mtime); 415 int (*mpo_check_vnode_stat)(struct ucred *active_cred, 416 struct ucred *file_cred, struct vnode *vp, 417 struct label *label); 418 int (*mpo_check_vnode_write)(struct ucred *active_cred, 419 struct ucred *file_cred, struct vnode *vp, 420 struct label *label); 421}; 422 423struct mac_policy_conf { 424 char *mpc_name; /* policy name */ 425 char *mpc_fullname; /* policy full name */ 426 struct mac_policy_ops *mpc_ops; /* policy operations */ 427 int mpc_loadtime_flags; /* flags */ 428 int *mpc_field_off; /* security field */ 429 int mpc_runtime_flags; /* flags */ 430 LIST_ENTRY(mac_policy_conf) mpc_list; /* global list */ 431}; 432 433/* Flags for the mpc_loadtime_flags field. */ 434#define MPC_LOADTIME_FLAG_NOTLATE 0x00000001 435#define MPC_LOADTIME_FLAG_UNLOADOK 0x00000002 436#define MPC_LOADTIME_FLAG_LABELMBUFS 0x00000004 437 438/* Flags for the mpc_runtime_flags field. */ 439#define MPC_RUNTIME_FLAG_REGISTERED 0x00000001 440 441#define MAC_POLICY_SET(mpops, mpname, mpfullname, mpflags, privdata_wanted) \ 442 static struct mac_policy_conf mpname##_mac_policy_conf = { \ 443 #mpname, \ 444 mpfullname, \ 445 mpops, \ 446 mpflags, \ 447 privdata_wanted, \ 448 0, \ 449 }; \ 450 static moduledata_t mpname##_mod = { \ 451 #mpname, \ 452 mac_policy_modevent, \ 453 &mpname##_mac_policy_conf \ 454 }; \ 455 MODULE_DEPEND(mpname, kernel_mac_support, 1, 1, 1); \ 456 DECLARE_MODULE(mpname, mpname##_mod, SI_SUB_MAC_POLICY, \ 457 SI_ORDER_MIDDLE) 458 459int mac_policy_modevent(module_t mod, int type, void *data); 460 461#define LABEL_TO_SLOT(l, s) (l)->l_perpolicy[s] 462 463#endif /* !_SYS_MAC_POLICY_H */ 464