sys/security/mac/mac_internal.h

   1 /*-
   2  * Copyright (c) 1999-2002, 2006, 2009, 2019 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, , name, mac__check__err,       \
  78             "int", arg0, arg1, arg2, arg3);                             \
  79         SDT_PROBE_DEFINE5(mac_framework, , name, mac__check__ok,        \
  80             "int", arg0, arg1, arg2, arg3);
  81
  82 #define MAC_CHECK_PROBE_DEFINE3(name, arg0, arg1, arg2)                 \
  83         SDT_PROBE_DEFINE4(mac_framework, , name, mac__check__err,       \
  84             "int", arg0, arg1, arg2);                                   \
  85         SDT_PROBE_DEFINE4(mac_framework, , name, mac__check__ok,        \
  86             "int", arg0, arg1, arg2);
  87
  88 #define MAC_CHECK_PROBE_DEFINE2(name, arg0, arg1)                       \
  89         SDT_PROBE_DEFINE3(mac_framework, , name, mac__check__err,       \
  90             "int", arg0, arg1);                                         \
  91         SDT_PROBE_DEFINE3(mac_framework, , name, mac__check__ok,        \
  92             "int", arg0, arg1);
  93
  94 #define MAC_CHECK_PROBE_DEFINE1(name, arg0)                             \
  95         SDT_PROBE_DEFINE2(mac_framework, , name, mac__check__err,       \
  96             "int", arg0);                                               \
  97         SDT_PROBE_DEFINE2(mac_framework, , name, mac__check__ok,        \
  98             "int", arg0);
  99
 100 #define MAC_CHECK_PROBE4(name, error, arg0, arg1, arg2, arg3)   do {    \
 101         if (SDT_PROBES_ENABLED()) {                                     \
 102                 if (error) {                                            \
 103                         SDT_PROBE5(mac_framework, , name, mac__check__err,\
 104                             error, arg0, arg1, arg2, arg3);             \
 105                 } else {                                                \
 106                         SDT_PROBE5(mac_framework, , name, mac__check__ok,\
 107                             0, arg0, arg1, arg2, arg3);                 \
 108                 }                                                       \
 109         }                                                               \
 110 } while (0)
 111
 112 #define MAC_CHECK_PROBE3(name, error, arg0, arg1, arg2)                 \
 113         MAC_CHECK_PROBE4(name, error, arg0, arg1, arg2, 0)
 114 #define MAC_CHECK_PROBE2(name, error, arg0, arg1)                       \
 115         MAC_CHECK_PROBE3(name, error, arg0, arg1, 0)
 116 #define MAC_CHECK_PROBE1(name, error, arg0)                             \
 117         MAC_CHECK_PROBE2(name, error, arg0, 0)
 118 #endif
 119
 120 #define MAC_GRANT_PROBE_DEFINE2(name, arg0, arg1)                       \
 121         SDT_PROBE_DEFINE3(mac_framework, , name, mac__grant__err,       \
 122             "int", arg0, arg1);                                         \
 123         SDT_PROBE_DEFINE3(mac_framework, , name, mac__grant__ok,        \
 124             "int", arg0, arg1);
 125
 126 #define MAC_GRANT_PROBE2(name, error, arg0, arg1)       do {            \
 127         if (SDT_PROBES_ENABLED()) {                                     \
 128                 if (error) {                                            \
 129                         SDT_PROBE3(mac_framework, , name, mac__grant__err,\
 130                             error, arg0, arg1);                         \
 131                 } else {                                                \
 132                         SDT_PROBE3(mac_framework, , name, mac__grant__ok,\
 133                             error, arg0, arg1);                         \
 134                 }                                                       \
 135         }                                                               \
 136 } while (0)
 137
 138 /*
 139  * MAC Framework global types and typedefs.
 140  */
 141 LIST_HEAD(mac_policy_list_head, mac_policy_conf);
 142 #ifdef MALLOC_DECLARE
 143 MALLOC_DECLARE(M_MACTEMP);
 144 #endif
 145
 146 /*
 147  * MAC labels -- in-kernel storage format.
 148  *
 149  * In general, struct label pointers are embedded in kernel data structures
 150  * representing objects that may be labeled (and protected).  Struct label is
 151  * opaque to both kernel services that invoke the MAC Framework and MAC
 152  * policy modules.  In particular, we do not wish to encode the layout of the
 153  * label structure into any ABIs.  Historically, the slot array contained
 154  * unions of {long, void} but now contains uintptr_t.
 155  */
 156 #define MAC_MAX_SLOTS   4
 157 #define MAC_FLAG_INITIALIZED    0x0000001       /* Is initialized for use. */
 158 struct label {
 159         int             l_flags;
 160         intptr_t        l_perpolicy[MAC_MAX_SLOTS];
 161 };
 162
 163 /*
 164  * Flags for mac_labeled, a bitmask of object types need across the union of
 165  * all policies currently registered with the MAC Framework, used to key
 166  * whether or not labels are allocated and constructors for the type are
 167  * invoked.
 168  */
 169 #define MPC_OBJECT_CRED                 0x0000000000000001
 170 #define MPC_OBJECT_PROC                 0x0000000000000002
 171 #define MPC_OBJECT_VNODE                0x0000000000000004
 172 #define MPC_OBJECT_INPCB                0x0000000000000008
 173 #define MPC_OBJECT_SOCKET               0x0000000000000010
 174 #define MPC_OBJECT_DEVFS                0x0000000000000020
 175 #define MPC_OBJECT_MBUF                 0x0000000000000040
 176 #define MPC_OBJECT_IPQ                  0x0000000000000080
 177 #define MPC_OBJECT_IFNET                0x0000000000000100
 178 #define MPC_OBJECT_BPFDESC              0x0000000000000200
 179 #define MPC_OBJECT_PIPE                 0x0000000000000400
 180 #define MPC_OBJECT_MOUNT                0x0000000000000800
 181 #define MPC_OBJECT_POSIXSEM             0x0000000000001000
 182 #define MPC_OBJECT_POSIXSHM             0x0000000000002000
 183 #define MPC_OBJECT_SYSVMSG              0x0000000000004000
 184 #define MPC_OBJECT_SYSVMSQ              0x0000000000008000
 185 #define MPC_OBJECT_SYSVSEM              0x0000000000010000
 186 #define MPC_OBJECT_SYSVSHM              0x0000000000020000
 187 #define MPC_OBJECT_SYNCACHE             0x0000000000040000
 188 #define MPC_OBJECT_IP6Q                 0x0000000000080000
 189
 190 /*
 191  * MAC Framework global variables.
 192  */
 193 extern struct mac_policy_list_head      mac_policy_list;
 194 extern struct mac_policy_list_head      mac_static_policy_list;
 195 extern u_int                            mac_policy_count;
 196 extern uint64_t                         mac_labeled;
 197 extern struct mtx                       mac_ifnet_mtx;
 198
 199 /*
 200  * MAC Framework infrastructure functions.
 201  */
 202 int     mac_error_select(int error1, int error2);
 203
 204 void    mac_policy_slock_nosleep(struct rm_priotracker *tracker);
 205 void    mac_policy_slock_sleep(void);
 206 void    mac_policy_sunlock_nosleep(struct rm_priotracker *tracker);
 207 void    mac_policy_sunlock_sleep(void);
 208
 209 struct label    *mac_labelzone_alloc(int flags);
 210 void             mac_labelzone_free(struct label *label);
 211 void             mac_labelzone_init(void);
 212
 213 void    mac_init_label(struct label *label);
 214 void    mac_destroy_label(struct label *label);
 215 int     mac_check_structmac_consistent(struct mac *mac);
 216 int     mac_allocate_slot(void);
 217
 218 /*
 219  * Lock ifnets to protect labels only if ifnet labels are in use.
 220  */
 221 #define MAC_IFNET_LOCK(ifp, locked)     do {                            \
 222         if (mac_labeled & MPC_OBJECT_IFNET) {                           \
 223                 mtx_lock(&mac_ifnet_mtx);                               \
 224                 locked = 1;                                             \
 225         } else {                                                        \
 226                 locked = 0;                                             \
 227         }                                                               \
 228 } while (0)
 229
 230 #define MAC_IFNET_UNLOCK(ifp, locked)   do {                            \
 231         if (locked) {                                                   \
 232                 mtx_unlock(&mac_ifnet_mtx);                             \
 233                 locked = 0;                                             \
 234         }                                                               \
 235 } while (0)
 236
 237 /*
 238  * MAC Framework per-object type functions.  It's not yet clear how the
 239  * namespaces, etc, should work for these, so for now, sort by object type.
 240  */
 241 struct label    *mac_cred_label_alloc(void);
 242 void             mac_cred_label_free(struct label *label);
 243 struct label    *mac_pipe_label_alloc(void);
 244 void             mac_pipe_label_free(struct label *label);
 245 struct label    *mac_socket_label_alloc(int flag);
 246 void             mac_socket_label_free(struct label *label);
 247 struct label    *mac_vnode_label_alloc(void);
 248 void             mac_vnode_label_free(struct label *label);
 249
 250 int     mac_cred_check_relabel(struct ucred *cred, struct label *newlabel);
 251 int     mac_cred_externalize_label(struct label *label, char *elements,
 252             char *outbuf, size_t outbuflen);
 253 int     mac_cred_internalize_label(struct label *label, char *string);
 254 void    mac_cred_relabel(struct ucred *cred, struct label *newlabel);
 255
 256 struct label    *mac_mbuf_to_label(struct mbuf *m);
 257
 258 void    mac_pipe_copy_label(struct label *src, struct label *dest);
 259 int     mac_pipe_externalize_label(struct label *label, char *elements,
 260             char *outbuf, size_t outbuflen);
 261 int     mac_pipe_internalize_label(struct label *label, char *string);
 262
 263 int     mac_socket_label_set(struct ucred *cred, struct socket *so,
 264             struct label *label);
 265 void    mac_socket_copy_label(struct label *src, struct label *dest);
 266 int     mac_socket_externalize_label(struct label *label, char *elements,
 267             char *outbuf, size_t outbuflen);
 268 int     mac_socket_internalize_label(struct label *label, char *string);
 269
 270 int     mac_vnode_externalize_label(struct label *label, char *elements,
 271             char *outbuf, size_t outbuflen);
 272 int     mac_vnode_internalize_label(struct label *label, char *string);
 273 void    mac_vnode_check_mmap_downgrade(struct ucred *cred, struct vnode *vp,
 274             int *prot);
 275 int     vn_setlabel(struct vnode *vp, struct label *intlabel,
 276             struct ucred *cred);
 277
 278 /*
 279  * MAC Framework composition macros invoke all registered MAC policies for a
 280  * specific entry point.  They come in two forms: one which permits policies
 281  * to sleep/block, and another that does not.
 282  *
 283  * MAC_POLICY_CHECK performs the designated check by walking the policy
 284  * module list and checking with each as to how it feels about the request.
 285  * Note that it returns its value via 'error' in the scope of the caller.
 286  */
 287 #define MAC_POLICY_CHECK(check, args...) do {                           \
 288         struct mac_policy_conf *mpc;                                    \
 289                                                                         \
 290         error = 0;                                                      \
 291         LIST_FOREACH(mpc, &mac_static_policy_list, mpc_list) {          \
 292                 if (mpc->mpc_ops->mpo_ ## check != NULL)                \
 293                         error = mac_error_select(                       \
 294                             mpc->mpc_ops->mpo_ ## check (args),         \
 295                             error);                                     \
 296         }                                                               \
 297         if (!LIST_EMPTY(&mac_policy_list)) {                            \
 298                 mac_policy_slock_sleep();                               \
 299                 LIST_FOREACH(mpc, &mac_policy_list, mpc_list) {         \
 300                         if (mpc->mpc_ops->mpo_ ## check != NULL)        \
 301                                 error = mac_error_select(               \
 302                                     mpc->mpc_ops->mpo_ ## check (args), \
 303                                     error);                             \
 304                 }                                                       \
 305                 mac_policy_sunlock_sleep();                             \
 306         }                                                               \
 307 } while (0)
 308
 309 #define MAC_POLICY_CHECK_NOSLEEP(check, args...) do {                   \
 310         struct mac_policy_conf *mpc;                                    \
 311                                                                         \
 312         error = 0;                                                      \
 313         LIST_FOREACH(mpc, &mac_static_policy_list, mpc_list) {          \
 314                 if (mpc->mpc_ops->mpo_ ## check != NULL)                \
 315                         error = mac_error_select(                       \
 316                             mpc->mpc_ops->mpo_ ## check (args),         \
 317                             error);                                     \
 318         }                                                               \
 319         if (!LIST_EMPTY(&mac_policy_list)) {                            \
 320                 struct rm_priotracker tracker;                          \
 321                                                                         \
 322                 mac_policy_slock_nosleep(&tracker);                     \
 323                 LIST_FOREACH(mpc, &mac_policy_list, mpc_list) {         \
 324                         if (mpc->mpc_ops->mpo_ ## check != NULL)        \
 325                                 error = mac_error_select(               \
 326                                     mpc->mpc_ops->mpo_ ## check (args), \
 327                                     error);                             \
 328                 }                                                       \
 329                 mac_policy_sunlock_nosleep(&tracker);                   \
 330         }                                                               \
 331 } while (0)
 332
 333 /*
 334  * MAC_POLICY_GRANT performs the designated check by walking the policy
 335  * module list and checking with each as to how it feels about the request.
 336  * Unlike MAC_POLICY_CHECK, it grants if any policies return '0', and
 337  * otherwise returns EPERM.  Note that it returns its value via 'error' in
 338  * the scope of the caller.
 339  */
 340 #define MAC_POLICY_GRANT_NOSLEEP(check, args...) do {                   \
 341         struct mac_policy_conf *mpc;                                    \
 342                                                                         \
 343         error = EPERM;                                                  \
 344         LIST_FOREACH(mpc, &mac_static_policy_list, mpc_list) {          \
 345                 if (mpc->mpc_ops->mpo_ ## check != NULL) {              \
 346                         if (mpc->mpc_ops->mpo_ ## check(args) == 0)     \
 347                                 error = 0;                              \
 348                 }                                                       \
 349         }                                                               \
 350         if (!LIST_EMPTY(&mac_policy_list)) {                            \
 351                 struct rm_priotracker tracker;                          \
 352                                                                         \
 353                 mac_policy_slock_nosleep(&tracker);                     \
 354                 LIST_FOREACH(mpc, &mac_policy_list, mpc_list) {         \
 355                         if (mpc->mpc_ops->mpo_ ## check != NULL) {      \
 356                                 if (mpc->mpc_ops->mpo_ ## check (args)  \
 357                                     == 0)                               \
 358                                         error = 0;                      \
 359                         }                                               \
 360                 }                                                       \
 361                 mac_policy_sunlock_nosleep(&tracker);                   \
 362         }                                                               \
 363 } while (0)
 364
 365 /*
 366  * MAC_POLICY_BOOLEAN performs the designated boolean composition by walking
 367  * the module list, invoking each instance of the operation, and combining
 368  * the results using the passed C operator.  Note that it returns its value
 369  * via 'result' in the scope of the caller, which should be initialized by
 370  * the caller in a meaningful way to get a meaningful result.
 371  */
 372 #define MAC_POLICY_BOOLEAN(operation, composition, args...) do {        \
 373         struct mac_policy_conf *mpc;                                    \
 374                                                                         \
 375         LIST_FOREACH(mpc, &mac_static_policy_list, mpc_list) {          \
 376                 if (mpc->mpc_ops->mpo_ ## operation != NULL)            \
 377                         result = result composition                     \
 378                             mpc->mpc_ops->mpo_ ## operation (args);     \
 379         }                                                               \
 380         if (!LIST_EMPTY(&mac_policy_list)) {                            \
 381                 mac_policy_slock_sleep();                               \
 382                 LIST_FOREACH(mpc, &mac_policy_list, mpc_list) {         \
 383                         if (mpc->mpc_ops->mpo_ ## operation != NULL)    \
 384                                 result = result composition             \
 385                                     mpc->mpc_ops->mpo_ ## operation     \
 386                                     (args);                             \
 387                 }                                                       \
 388                 mac_policy_sunlock_sleep();                             \
 389         }                                                               \
 390 } while (0)
 391
 392 #define MAC_POLICY_BOOLEAN_NOSLEEP(operation, composition, args...) do {\
 393         struct mac_policy_conf *mpc;                                    \
 394                                                                         \
 395         LIST_FOREACH(mpc, &mac_static_policy_list, mpc_list) {          \
 396                 if (mpc->mpc_ops->mpo_ ## operation != NULL)            \
 397                         result = result composition                     \
 398                             mpc->mpc_ops->mpo_ ## operation (args);     \
 399         }                                                               \
 400         if (!LIST_EMPTY(&mac_policy_list)) {                            \
 401                 struct rm_priotracker tracker;                          \
 402                                                                         \
 403                 mac_policy_slock_nosleep(&tracker);                     \
 404                 LIST_FOREACH(mpc, &mac_policy_list, mpc_list) {         \
 405                         if (mpc->mpc_ops->mpo_ ## operation != NULL)    \
 406                                 result = result composition             \
 407                                     mpc->mpc_ops->mpo_ ## operation     \
 408                                     (args);                             \
 409                 }                                                       \
 410                 mac_policy_sunlock_nosleep(&tracker);                   \
 411         }                                                               \
 412 } while (0)
 413
 414 /*
 415  * MAC_POLICY_EXTERNALIZE queries each policy to see if it can generate an
 416  * externalized version of a label element by name.  Policies declare whether
 417  * they have matched a particular element name, parsed from the string by
 418  * MAC_POLICY_EXTERNALIZE, and an error is returned if any element is matched
 419  * by no policy.
 420  */
 421 #define MAC_POLICY_EXTERNALIZE(type, label, elementlist, outbuf,        \
 422     outbuflen) do {                                                     \
 423         int claimed, first, ignorenotfound, savedlen;                   \
 424         char *element_name, *element_temp;                              \
 425         struct sbuf sb;                                                 \
 426                                                                         \
 427         error = 0;                                                      \
 428         first = 1;                                                      \
 429         sbuf_new(&sb, outbuf, outbuflen, SBUF_FIXEDLEN);                \
 430         element_temp = elementlist;                                     \
 431         while ((element_name = strsep(&element_temp, ",")) != NULL) {   \
 432                 if (element_name[0] == '?') {                           \
 433                         element_name++;                                 \
 434                         ignorenotfound = 1;                             \
 435                  } else                                                 \
 436                         ignorenotfound = 0;                             \
 437                 savedlen = sbuf_len(&sb);                               \
 438                 if (first)                                              \
 439                         error = sbuf_printf(&sb, "%s/", element_name);  \
 440                 else                                                    \
 441                         error = sbuf_printf(&sb, ",%s/", element_name); \
 442                 if (error == -1) {                                      \
 443                         error = EINVAL; /* XXX: E2BIG? */               \
 444                         break;                                          \
 445                 }                                                       \
 446                 claimed = 0;                                            \
 447                 MAC_POLICY_CHECK(type ## _externalize_label, label,     \
 448                     element_name, &sb, &claimed);                       \
 449                 if (error)                                              \
 450                         break;                                          \
 451                 if (claimed == 0 && ignorenotfound) {                   \
 452                         /* Revert last label name. */                   \
 453                         sbuf_setpos(&sb, savedlen);                     \
 454                 } else if (claimed != 1) {                              \
 455                         error = EINVAL; /* XXX: ENOLABEL? */            \
 456                         break;                                          \
 457                 } else {                                                \
 458                         first = 0;                                      \
 459                 }                                                       \
 460         }                                                               \
 461         sbuf_finish(&sb);                                               \
 462 } while (0)
 463
 464 /*
 465  * MAC_POLICY_INTERNALIZE presents parsed element names and data to each
 466  * policy to see if any is willing to claim it and internalize the label
 467  * data.  If no policies match, an error is returned.
 468  */
 469 #define MAC_POLICY_INTERNALIZE(type, label, instring) do {              \
 470         char *element, *element_name, *element_data;                    \
 471         int claimed;                                                    \
 472                                                                         \
 473         error = 0;                                                      \
 474         element = instring;                                             \
 475         while ((element_name = strsep(&element, ",")) != NULL) {        \
 476                 element_data = element_name;                            \
 477                 element_name = strsep(&element_data, "/");              \
 478                 if (element_data == NULL) {                             \
 479                         error = EINVAL;                                 \
 480                         break;                                          \
 481                 }                                                       \
 482                 claimed = 0;                                            \
 483                 MAC_POLICY_CHECK(type ## _internalize_label, label,     \
 484                     element_name, element_data, &claimed);              \
 485                 if (error)                                              \
 486                         break;                                          \
 487                 if (claimed != 1) {                                     \
 488                         /* XXXMAC: Another error here? */               \
 489                         error = EINVAL;                                 \
 490                         break;                                          \
 491                 }                                                       \
 492         }                                                               \
 493 } while (0)
 494
 495 /*
 496  * MAC_POLICY_PERFORM performs the designated operation by walking the policy
 497  * module list and invoking that operation for each policy.
 498  */
 499 #define MAC_POLICY_PERFORM(operation, args...) do {                     \
 500         struct mac_policy_conf *mpc;                                    \
 501                                                                         \
 502         LIST_FOREACH(mpc, &mac_static_policy_list, mpc_list) {          \
 503                 if (mpc->mpc_ops->mpo_ ## operation != NULL)            \
 504                         mpc->mpc_ops->mpo_ ## operation (args);         \
 505         }                                                               \
 506         if (!LIST_EMPTY(&mac_policy_list)) {                            \
 507                 mac_policy_slock_sleep();                               \
 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_sleep();                             \
 513         }                                                               \
 514 } while (0)
 515
 516 #define MAC_POLICY_PERFORM_NOSLEEP(operation, args...) do {             \
 517         struct mac_policy_conf *mpc;                                    \
 518                                                                         \
 519         LIST_FOREACH(mpc, &mac_static_policy_list, mpc_list) {          \
 520                 if (mpc->mpc_ops->mpo_ ## operation != NULL)            \
 521                         mpc->mpc_ops->mpo_ ## operation (args);         \
 522         }                                                               \
 523         if (!LIST_EMPTY(&mac_policy_list)) {                            \
 524                 struct rm_priotracker tracker;                          \
 525                                                                         \
 526                 mac_policy_slock_nosleep(&tracker);                     \
 527                 LIST_FOREACH(mpc, &mac_policy_list, mpc_list) {         \
 528                         if (mpc->mpc_ops->mpo_ ## operation != NULL)    \
 529                                 mpc->mpc_ops->mpo_ ## operation (args); \
 530                 }                                                       \
 531                 mac_policy_sunlock_nosleep(&tracker);                   \
 532         }                                                               \
 533 } while (0)
 534
 535 #endif /* !_SECURITY_MAC_MAC_INTERNAL_H_ */