sys/security/mac/mac_internal.h

   1 /*-
   2  * Copyright (c) 1999-2002, 2006, 2009 Robert N. M. Watson
   3  * Copyright (c) 2001 Ilmar S. Habibulin
   4  * Copyright (c) 2001-2004 Networks Associates Technology, Inc.
   5  * Copyright (c) 2006 nCircle Network Security, Inc.
   6  * Copyright (c) 2006 SPARTA, Inc.
   7  * Copyright (c) 2009 Apple, Inc.
   8  * All rights reserved.
   9  *
  10  * This software was developed by Robert Watson and Ilmar Habibulin for the
  11  * TrustedBSD Project.
  12  *
  13  * This software was developed for the FreeBSD Project in part by Network
  14  * Associates Laboratories, the Security Research Division of Network
  15  * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"),
  16  * as part of the DARPA CHATS research program.
  17  *
  18  * This software was developed by Robert N. M. Watson for the TrustedBSD
  19  * Project under contract to nCircle Network Security, Inc.
  20  *
  21  * This software was enhanced by SPARTA ISSO under SPAWAR contract
  22  * N66001-04-C-6019 ("SEFOS").
  23  *
  24  * This software was developed at the University of Cambridge Computer
  25  * Laboratory with support from a grant from Google, Inc.
  26  *
  27  * Redistribution and use in source and binary forms, with or without
  28  * modification, are permitted provided that the following conditions
  29  * are met:
  30  * 1. Redistributions of source code must retain the above copyright
  31  *    notice, this list of conditions and the following disclaimer.
  32  * 2. Redistributions in binary form must reproduce the above copyright
  33  *    notice, this list of conditions and the following disclaimer in the
  34  *    documentation and/or other materials provided with the distribution.
  35  *
  36  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  37  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  38  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  39  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  40  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  41  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  42  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  43  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  44  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  45  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  46  * SUCH DAMAGE.
  47  *
  48  * $FreeBSD$
  49  */
  50
  51 #ifndef _SECURITY_MAC_MAC_INTERNAL_H_
  52 #define _SECURITY_MAC_MAC_INTERNAL_H_
  53
  54 #ifndef _KERNEL
  55 #error "no user-serviceable parts inside"
  56 #endif
  57
  58 #include <sys/lock.h>
  59 #include <sys/rmlock.h>
  60
  61 /*
  62  * MAC Framework sysctl namespace.
  63  */
  64 #ifdef SYSCTL_DECL
  65 SYSCTL_DECL(_security_mac);
  66 #endif /* SYSCTL_DECL */
  67
  68 /*
  69  * MAC Framework SDT DTrace probe namespace, macros for declaring entry
  70  * point probes, macros for invoking them.
  71  */
  72 #ifdef SDT_PROVIDER_DECLARE
  73 SDT_PROVIDER_DECLARE(mac);              /* MAC Framework-level events. */
  74 SDT_PROVIDER_DECLARE(mac_framework);    /* Entry points to MAC. */
  75
  76 #define MAC_CHECK_PROBE_DEFINE4(name, arg0, arg1, arg2, arg3)           \
  77         SDT_PROBE_DEFINE5(mac_framework, kernel, name, mac_check_err,   \
  78             mac-check-ok, "int", arg0, arg1, arg2, arg3);               \
  79         SDT_PROBE_DEFINE5(mac_framework, kernel, name, mac_check_ok,    \
  80             mac-check-ok, "int", arg0, arg1, arg2, arg3);
  81
  82 #define MAC_CHECK_PROBE_DEFINE3(name, arg0, arg1, arg2)                 \
  83         SDT_PROBE_DEFINE4(mac_framework, kernel, name, mac_check_err,   \
  84             mac-check-err, "int", arg0, arg1, arg2);                    \
  85         SDT_PROBE_DEFINE4(mac_framework, kernel, name, mac_check_ok,    \
  86             mac-check-ok, "int", arg0, arg1, arg2);
  87
  88 #define MAC_CHECK_PROBE_DEFINE2(name, arg0, arg1)                       \
  89         SDT_PROBE_DEFINE3(mac_framework, kernel, name, mac_check_err,   \
  90             mac-check-err, "int", arg0, arg1);                          \
  91         SDT_PROBE_DEFINE3(mac_framework, kernel, name, mac_check_ok,    \
  92             mac-check-ok, "int", arg0, arg1);
  93
  94 #define MAC_CHECK_PROBE_DEFINE1(name, arg0)                             \
  95         SDT_PROBE_DEFINE2(mac_framework, kernel, name, mac_check_err,   \
  96             mac-check-err, "int", arg0);                                \
  97         SDT_PROBE_DEFINE2(mac_framework, kernel, name, mac_check_ok,    \
  98             mac-check-ok, "int", arg0);
  99
 100 #define MAC_CHECK_PROBE4(name, error, arg0, arg1, arg2, arg3)   do {    \
 101         if (error) {                                                    \
 102                 SDT_PROBE(mac_framework, kernel, name, mac_check_err,   \
 103                     error, arg0, arg1, arg2, arg3);                     \
 104         } else {                                                        \
 105                 SDT_PROBE(mac_framework, kernel, name, mac_check_ok,    \
 106                     0, arg0, arg1, arg2, arg3);                         \
 107         }                                                               \
 108 } while (0)
 109
 110 #define MAC_CHECK_PROBE3(name, error, arg0, arg1, arg2)                 \
 111         MAC_CHECK_PROBE4(name, error, arg0, arg1, arg2, 0)
 112 #define MAC_CHECK_PROBE2(name, error, arg0, arg1)                       \
 113         MAC_CHECK_PROBE3(name, error, arg0, arg1, 0)
 114 #define MAC_CHECK_PROBE1(name, error, arg0)                             \
 115         MAC_CHECK_PROBE2(name, error, arg0, 0)
 116 #endif
 117
 118 #define MAC_GRANT_PROBE_DEFINE2(name, arg0, arg1)                       \
 119         SDT_PROBE_DEFINE3(mac_framework, kernel, name, mac_grant_err,   \
 120             mac-grant-err, "int", arg0, arg1);                          \
 121         SDT_PROBE_DEFINE3(mac_framework, kernel, name, mac_grant_ok,    \
 122             mac-grant-ok, "INT", arg0, arg1);
 123
 124 #define MAC_GRANT_PROBE2(name, error, arg0, arg1)       do {            \
 125         if (error) {                                                    \
 126                 SDT_PROBE(mac_framework, kernel, name, mac_grant_err,   \
 127                     error, arg0, arg1, 0, 0);                           \
 128         } else {                                                        \
 129                 SDT_PROBE(mac_framework, kernel, name, mac_grant_ok,    \
 130                     error, arg0, arg1, 0, 0);                           \
 131         }                                                               \
 132 } while (0)
 133
 134 /*
 135  * MAC Framework global types and typedefs.
 136  */
 137 LIST_HEAD(mac_policy_list_head, mac_policy_conf);
 138 #ifdef MALLOC_DECLARE
 139 MALLOC_DECLARE(M_MACTEMP);
 140 #endif
 141
 142 /*
 143  * MAC labels -- in-kernel storage format.
 144  *
 145  * In general, struct label pointers are embedded in kernel data structures
 146  * representing objects that may be labeled (and protected).  Struct label is
 147  * opaque to both kernel services that invoke the MAC Framework and MAC
 148  * policy modules.  In particular, we do not wish to encode the layout of the
 149  * label structure into any ABIs.  Historically, the slot array contained
 150  * unions of {long, void} but now contains uintptr_t.
 151  */
 152 #define MAC_MAX_SLOTS   4
 153 #define MAC_FLAG_INITIALIZED    0x0000001       /* Is initialized for use. */
 154 struct label {
 155         int             l_flags;
 156         intptr_t        l_perpolicy[MAC_MAX_SLOTS];
 157 };
 158
 159
 160 /*
 161  * Flags for mac_labeled, a bitmask of object types need across the union of
 162  * all policies currently registered with the MAC Framework, used to key
 163  * whether or not labels are allocated and constructors for the type are
 164  * invoked.
 165  */
 166 #define MPC_OBJECT_CRED                 0x0000000000000001
 167 #define MPC_OBJECT_PROC                 0x0000000000000002
 168 #define MPC_OBJECT_VNODE                0x0000000000000004
 169 #define MPC_OBJECT_INPCB                0x0000000000000008
 170 #define MPC_OBJECT_SOCKET               0x0000000000000010
 171 #define MPC_OBJECT_DEVFS                0x0000000000000020
 172 #define MPC_OBJECT_MBUF                 0x0000000000000040
 173 #define MPC_OBJECT_IPQ                  0x0000000000000080
 174 #define MPC_OBJECT_IFNET                0x0000000000000100
 175 #define MPC_OBJECT_BPFDESC              0x0000000000000200
 176 #define MPC_OBJECT_PIPE                 0x0000000000000400
 177 #define MPC_OBJECT_MOUNT                0x0000000000000800
 178 #define MPC_OBJECT_POSIXSEM             0x0000000000001000
 179 #define MPC_OBJECT_POSIXSHM             0x0000000000002000
 180 #define MPC_OBJECT_SYSVMSG              0x0000000000004000
 181 #define MPC_OBJECT_SYSVMSQ              0x0000000000008000
 182 #define MPC_OBJECT_SYSVSEM              0x0000000000010000
 183 #define MPC_OBJECT_SYSVSHM              0x0000000000020000
 184 #define MPC_OBJECT_SYNCACHE             0x0000000000040000
 185 #define MPC_OBJECT_IP6Q                 0x0000000000080000
 186
 187 /*
 188  * MAC Framework global variables.
 189  */
 190 extern struct mac_policy_list_head      mac_policy_list;
 191 extern struct mac_policy_list_head      mac_static_policy_list;
 192 extern u_int                            mac_policy_count;
 193 extern uint64_t                         mac_labeled;
 194 extern struct mtx                       mac_ifnet_mtx;
 195
 196 /*
 197  * MAC Framework infrastructure functions.
 198  */
 199 int     mac_error_select(int error1, int error2);
 200
 201 void    mac_policy_slock_nosleep(struct rm_priotracker *tracker);
 202 void    mac_policy_slock_sleep(void);
 203 void    mac_policy_sunlock_nosleep(struct rm_priotracker *tracker);
 204 void    mac_policy_sunlock_sleep(void);
 205
 206 struct label    *mac_labelzone_alloc(int flags);
 207 void             mac_labelzone_free(struct label *label);
 208 void             mac_labelzone_init(void);
 209
 210 void    mac_init_label(struct label *label);
 211 void    mac_destroy_label(struct label *label);
 212 int     mac_check_structmac_consistent(struct mac *mac);
 213 int     mac_allocate_slot(void);
 214
 215 #define MAC_IFNET_LOCK(ifp)     mtx_lock(&mac_ifnet_mtx)
 216 #define MAC_IFNET_UNLOCK(ifp)   mtx_unlock(&mac_ifnet_mtx)
 217
 218 /*
 219  * MAC Framework per-object type functions.  It's not yet clear how the
 220  * namespaces, etc, should work for these, so for now, sort by object type.
 221  */
 222 struct label    *mac_cred_label_alloc(void);
 223 void             mac_cred_label_free(struct label *label);
 224 struct label    *mac_pipe_label_alloc(void);
 225 void             mac_pipe_label_free(struct label *label);
 226 struct label    *mac_socket_label_alloc(int flag);
 227 void             mac_socket_label_free(struct label *label);
 228 struct label    *mac_vnode_label_alloc(void);
 229 void             mac_vnode_label_free(struct label *label);
 230
 231 int     mac_cred_check_relabel(struct ucred *cred, struct label *newlabel);
 232 int     mac_cred_externalize_label(struct label *label, char *elements,
 233             char *outbuf, size_t outbuflen);
 234 int     mac_cred_internalize_label(struct label *label, char *string);
 235 void    mac_cred_relabel(struct ucred *cred, struct label *newlabel);
 236
 237 struct label    *mac_mbuf_to_label(struct mbuf *m);
 238
 239 void    mac_pipe_copy_label(struct label *src, struct label *dest);
 240 int     mac_pipe_externalize_label(struct label *label, char *elements,
 241             char *outbuf, size_t outbuflen);
 242 int     mac_pipe_internalize_label(struct label *label, char *string);
 243
 244 int     mac_socket_label_set(struct ucred *cred, struct socket *so,
 245             struct label *label);
 246 void    mac_socket_copy_label(struct label *src, struct label *dest);
 247 int     mac_socket_externalize_label(struct label *label, char *elements,
 248             char *outbuf, size_t outbuflen);
 249 int     mac_socket_internalize_label(struct label *label, char *string);
 250
 251 int     mac_vnode_externalize_label(struct label *label, char *elements,
 252             char *outbuf, size_t outbuflen);
 253 int     mac_vnode_internalize_label(struct label *label, char *string);
 254 void    mac_vnode_check_mmap_downgrade(struct ucred *cred, struct vnode *vp,
 255             int *prot);
 256 int     vn_setlabel(struct vnode *vp, struct label *intlabel,
 257             struct ucred *cred);
 258
 259 /*
 260  * MAC Framework composition macros invoke all registered MAC policies for a
 261  * specific entry point.  They come in two forms: one which permits policies
 262  * to sleep/block, and another that does not.
 263  *
 264  * MAC_POLICY_CHECK performs the designated check by walking the policy
 265  * module list and checking with each as to how it feels about the request.
 266  * Note that it returns its value via 'error' in the scope of the caller.
 267  */
 268 #define MAC_POLICY_CHECK(check, args...) do {                           \
 269         struct mac_policy_conf *mpc;                                    \
 270                                                                         \
 271         error = 0;                                                      \
 272         LIST_FOREACH(mpc, &mac_static_policy_list, mpc_list) {          \
 273                 if (mpc->mpc_ops->mpo_ ## check != NULL)                \
 274                         error = mac_error_select(                       \
 275                             mpc->mpc_ops->mpo_ ## check (args),         \
 276                             error);                                     \
 277         }                                                               \
 278         if (!LIST_EMPTY(&mac_policy_list)) {                            \
 279                 mac_policy_slock_sleep();                               \
 280                 LIST_FOREACH(mpc, &mac_policy_list, mpc_list) {         \
 281                         if (mpc->mpc_ops->mpo_ ## check != NULL)        \
 282                                 error = mac_error_select(               \
 283                                     mpc->mpc_ops->mpo_ ## check (args), \
 284                                     error);                             \
 285                 }                                                       \
 286                 mac_policy_sunlock_sleep();                             \
 287         }                                                               \
 288 } while (0)
 289
 290 #define MAC_POLICY_CHECK_NOSLEEP(check, args...) do {                   \
 291         struct mac_policy_conf *mpc;                                    \
 292                                                                         \
 293         error = 0;                                                      \
 294         LIST_FOREACH(mpc, &mac_static_policy_list, mpc_list) {          \
 295                 if (mpc->mpc_ops->mpo_ ## check != NULL)                \
 296                         error = mac_error_select(                       \
 297                             mpc->mpc_ops->mpo_ ## check (args),         \
 298                             error);                                     \
 299         }                                                               \
 300         if (!LIST_EMPTY(&mac_policy_list)) {                            \
 301                 struct rm_priotracker tracker;                          \
 302                                                                         \
 303                 mac_policy_slock_nosleep(&tracker);                     \
 304                 LIST_FOREACH(mpc, &mac_policy_list, mpc_list) {         \
 305                         if (mpc->mpc_ops->mpo_ ## check != NULL)        \
 306                                 error = mac_error_select(               \
 307                                     mpc->mpc_ops->mpo_ ## check (args), \
 308                                     error);                             \
 309                 }                                                       \
 310                 mac_policy_sunlock_nosleep(&tracker);                   \
 311         }                                                               \
 312 } while (0)
 313
 314 /*
 315  * MAC_POLICY_GRANT performs the designated check by walking the policy
 316  * module list and checking with each as to how it feels about the request.
 317  * Unlike MAC_POLICY_CHECK, it grants if any policies return '0', and
 318  * otherwise returns EPERM.  Note that it returns its value via 'error' in
 319  * the scope of the caller.
 320  */
 321 #define MAC_POLICY_GRANT_NOSLEEP(check, args...) do {                   \
 322         struct mac_policy_conf *mpc;                                    \
 323                                                                         \
 324         error = EPERM;                                                  \
 325         LIST_FOREACH(mpc, &mac_static_policy_list, mpc_list) {          \
 326                 if (mpc->mpc_ops->mpo_ ## check != NULL) {              \
 327                         if (mpc->mpc_ops->mpo_ ## check(args) == 0)     \
 328                                 error = 0;                              \
 329                 }                                                       \
 330         }                                                               \
 331         if (!LIST_EMPTY(&mac_policy_list)) {                            \
 332                 struct rm_priotracker tracker;                          \
 333                                                                         \
 334                 mac_policy_slock_nosleep(&tracker);                     \
 335                 LIST_FOREACH(mpc, &mac_policy_list, mpc_list) {         \
 336                         if (mpc->mpc_ops->mpo_ ## check != NULL) {      \
 337                                 if (mpc->mpc_ops->mpo_ ## check (args)  \
 338                                     == 0)                               \
 339                                         error = 0;                      \
 340                         }                                               \
 341                 }                                                       \
 342                 mac_policy_sunlock_nosleep(&tracker);                   \
 343         }                                                               \
 344 } while (0)
 345
 346 /*
 347  * MAC_POLICY_BOOLEAN performs the designated boolean composition by walking
 348  * the module list, invoking each instance of the operation, and combining
 349  * the results using the passed C operator.  Note that it returns its value
 350  * via 'result' in the scope of the caller, which should be initialized by
 351  * the caller in a meaningful way to get a meaningful result.
 352  */
 353 #define MAC_POLICY_BOOLEAN(operation, composition, args...) do {        \
 354         struct mac_policy_conf *mpc;                                    \
 355                                                                         \
 356         LIST_FOREACH(mpc, &mac_static_policy_list, mpc_list) {          \
 357                 if (mpc->mpc_ops->mpo_ ## operation != NULL)            \
 358                         result = result composition                     \
 359                             mpc->mpc_ops->mpo_ ## operation (args);     \
 360         }                                                               \
 361         if (!LIST_EMPTY(&mac_policy_list)) {                            \
 362                 mac_policy_slock_sleep();                               \
 363                 LIST_FOREACH(mpc, &mac_policy_list, mpc_list) {         \
 364                         if (mpc->mpc_ops->mpo_ ## operation != NULL)    \
 365                                 result = result composition             \
 366                                     mpc->mpc_ops->mpo_ ## operation     \
 367                                     (args);                             \
 368                 }                                                       \
 369                 mac_policy_sunlock_sleep();                             \
 370         }                                                               \
 371 } while (0)
 372
 373 #define MAC_POLICY_BOOLEAN_NOSLEEP(operation, composition, args...) do {\
 374         struct mac_policy_conf *mpc;                                    \
 375                                                                         \
 376         LIST_FOREACH(mpc, &mac_static_policy_list, mpc_list) {          \
 377                 if (mpc->mpc_ops->mpo_ ## operation != NULL)            \
 378                         result = result composition                     \
 379                             mpc->mpc_ops->mpo_ ## operation (args);     \
 380         }                                                               \
 381         if (!LIST_EMPTY(&mac_policy_list)) {                            \
 382                 struct rm_priotracker tracker;                          \
 383                                                                         \
 384                 mac_policy_slock_nosleep(&tracker);                     \
 385                 LIST_FOREACH(mpc, &mac_policy_list, mpc_list) {         \
 386                         if (mpc->mpc_ops->mpo_ ## operation != NULL)    \
 387                                 result = result composition             \
 388                                     mpc->mpc_ops->mpo_ ## operation     \
 389                                     (args);                             \
 390                 }                                                       \
 391                 mac_policy_sunlock_nosleep(&tracker);                   \
 392         }                                                               \
 393 } while (0)
 394
 395 /*
 396  * MAC_POLICY_EXTERNALIZE queries each policy to see if it can generate an
 397  * externalized version of a label element by name.  Policies declare whether
 398  * they have matched a particular element name, parsed from the string by
 399  * MAC_POLICY_EXTERNALIZE, and an error is returned if any element is matched
 400  * by no policy.
 401  */
 402 #define MAC_POLICY_EXTERNALIZE(type, label, elementlist, outbuf,        \
 403     outbuflen) do {                                                     \
 404         int claimed, first, ignorenotfound, savedlen;                   \
 405         char *element_name, *element_temp;                              \
 406         struct sbuf sb;                                                 \
 407                                                                         \
 408         error = 0;                                                      \
 409         first = 1;                                                      \
 410         sbuf_new(&sb, outbuf, outbuflen, SBUF_FIXEDLEN);                \
 411         element_temp = elementlist;                                     \
 412         while ((element_name = strsep(&element_temp, ",")) != NULL) {   \
 413                 if (element_name[0] == '?') {                           \
 414                         element_name++;                                 \
 415                         ignorenotfound = 1;                             \
 416                  } else                                                 \
 417                         ignorenotfound = 0;                             \
 418                 savedlen = sbuf_len(&sb);                               \
 419                 if (first)                                              \
 420                         error = sbuf_printf(&sb, "%s/", element_name);  \
 421                 else                                                    \
 422                         error = sbuf_printf(&sb, ",%s/", element_name); \
 423                 if (error == -1) {                                      \
 424                         error = EINVAL; /* XXX: E2BIG? */               \
 425                         break;                                          \
 426                 }                                                       \
 427                 claimed = 0;                                            \
 428                 MAC_POLICY_CHECK(type ## _externalize_label, label,     \
 429                     element_name, &sb, &claimed);                       \
 430                 if (error)                                              \
 431                         break;                                          \
 432                 if (claimed == 0 && ignorenotfound) {                   \
 433                         /* Revert last label name. */                   \
 434                         sbuf_setpos(&sb, savedlen);                     \
 435                 } else if (claimed != 1) {                              \
 436                         error = EINVAL; /* XXX: ENOLABEL? */            \
 437                         break;                                          \
 438                 } else {                                                \
 439                         first = 0;                                      \
 440                 }                                                       \
 441         }                                                               \
 442         sbuf_finish(&sb);                                               \
 443 } while (0)
 444
 445 /*
 446  * MAC_POLICY_INTERNALIZE presents parsed element names and data to each
 447  * policy to see if any is willing to claim it and internalize the label
 448  * data.  If no policies match, an error is returned.
 449  */
 450 #define MAC_POLICY_INTERNALIZE(type, label, instring) do {              \
 451         char *element, *element_name, *element_data;                    \
 452         int claimed;                                                    \
 453                                                                         \
 454         error = 0;                                                      \
 455         element = instring;                                             \
 456         while ((element_name = strsep(&element, ",")) != NULL) {        \
 457                 element_data = element_name;                            \
 458                 element_name = strsep(&element_data, "/");              \
 459                 if (element_data == NULL) {                             \
 460                         error = EINVAL;                                 \
 461                         break;                                          \
 462                 }                                                       \
 463                 claimed = 0;                                            \
 464                 MAC_POLICY_CHECK(type ## _internalize_label, label,     \
 465                     element_name, element_data, &claimed);              \
 466                 if (error)                                              \
 467                         break;                                          \
 468                 if (claimed != 1) {                                     \
 469                         /* XXXMAC: Another error here? */               \
 470                         error = EINVAL;                                 \
 471                         break;                                          \
 472                 }                                                       \
 473         }                                                               \
 474 } while (0)
 475
 476 /*
 477  * MAC_POLICY_PERFORM performs the designated operation by walking the policy
 478  * module list and invoking that operation for each policy.
 479  */
 480 #define MAC_POLICY_PERFORM(operation, args...) do {                     \
 481         struct mac_policy_conf *mpc;                                    \
 482                                                                         \
 483         LIST_FOREACH(mpc, &mac_static_policy_list, mpc_list) {          \
 484                 if (mpc->mpc_ops->mpo_ ## operation != NULL)            \
 485                         mpc->mpc_ops->mpo_ ## operation (args);         \
 486         }                                                               \
 487         if (!LIST_EMPTY(&mac_policy_list)) {                            \
 488                 mac_policy_slock_sleep();                               \
 489                 LIST_FOREACH(mpc, &mac_policy_list, mpc_list) {         \
 490                         if (mpc->mpc_ops->mpo_ ## operation != NULL)    \
 491                                 mpc->mpc_ops->mpo_ ## operation (args); \
 492                 }                                                       \
 493                 mac_policy_sunlock_sleep();                             \
 494         }                                                               \
 495 } while (0)
 496
 497 #define MAC_POLICY_PERFORM_NOSLEEP(operation, args...) do {             \
 498         struct mac_policy_conf *mpc;                                    \
 499                                                                         \
 500         LIST_FOREACH(mpc, &mac_static_policy_list, mpc_list) {          \
 501                 if (mpc->mpc_ops->mpo_ ## operation != NULL)            \
 502                         mpc->mpc_ops->mpo_ ## operation (args);         \
 503         }                                                               \
 504         if (!LIST_EMPTY(&mac_policy_list)) {                            \
 505                 struct rm_priotracker tracker;                          \
 506                                                                         \
 507                 mac_policy_slock_nosleep(&tracker);                     \
 508                 LIST_FOREACH(mpc, &mac_policy_list, mpc_list) {         \
 509                         if (mpc->mpc_ops->mpo_ ## operation != NULL)    \
 510                                 mpc->mpc_ops->mpo_ ## operation (args); \
 511                 }                                                       \
 512                 mac_policy_sunlock_nosleep(&tracker);                   \
 513         }                                                               \
 514 } while (0)
 515
 516 #endif /* !_SECURITY_MAC_MAC_INTERNAL_H_ */