net/netlabel/netlabel_mgmt.c

   1 /*
   2  * NetLabel Management Support
   3  *
   4  * This file defines the management functions for the NetLabel system.  The
   5  * NetLabel system manages static and dynamic label mappings for network
   6  * protocols such as CIPSO and RIPSO.
   7  *
   8  * Author: Paul Moore <paul.moore@hp.com>
   9  *
  10  */
  11
  12 /*
  13  * (c) Copyright Hewlett-Packard Development Company, L.P., 2006
  14  *
  15  * This program is free software;  you can redistribute it and/or modify
  16  * it under the terms of the GNU General Public License as published by
  17  * the Free Software Foundation; either version 2 of the License, or
  18  * (at your option) any later version.
  19  *
  20  * This program is distributed in the hope that it will be useful,
  21  * but WITHOUT ANY WARRANTY;  without even the implied warranty of
  22  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  23  * the GNU General Public License for more details.
  24  *
  25  * You should have received a copy of the GNU General Public License
  26  * along with this program;  if not, write to the Free Software
  27  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  28  *
  29  */
  30
  31 #include <linux/types.h>
  32 #include <linux/socket.h>
  33 #include <linux/string.h>
  34 #include <linux/skbuff.h>
  35 #include <net/sock.h>
  36 #include <net/netlink.h>
  37 #include <net/genetlink.h>
  38 #include <net/netlabel.h>
  39 #include <net/cipso_ipv4.h>
  40
  41 #include "netlabel_domainhash.h"
  42 #include "netlabel_user.h"
  43 #include "netlabel_mgmt.h"
  44
  45 /* NetLabel configured protocol count */
  46 static DEFINE_SPINLOCK(netlabel_mgmt_protocount_lock);
  47 static u32 netlabel_mgmt_protocount = 0;
  48
  49 /* Argument struct for netlbl_domhsh_walk() */
  50 struct netlbl_domhsh_walk_arg {
  51         struct netlink_callback *nl_cb;
  52         struct sk_buff *skb;
  53         u32 seq;
  54 };
  55
  56 /* NetLabel Generic NETLINK CIPSOv4 family */
  57 static struct genl_family netlbl_mgmt_gnl_family = {
  58         .id = GENL_ID_GENERATE,
  59         .hdrsize = 0,
  60         .name = NETLBL_NLTYPE_MGMT_NAME,
  61         .version = NETLBL_PROTO_VERSION,
  62         .maxattr = NLBL_MGMT_A_MAX,
  63 };
  64
  65 /* NetLabel Netlink attribute policy */
  66 static const struct nla_policy netlbl_mgmt_genl_policy[NLBL_MGMT_A_MAX + 1] = {
  67         [NLBL_MGMT_A_DOMAIN] = { .type = NLA_NUL_STRING },
  68         [NLBL_MGMT_A_PROTOCOL] = { .type = NLA_U32 },
  69         [NLBL_MGMT_A_VERSION] = { .type = NLA_U32 },
  70         [NLBL_MGMT_A_CV4DOI] = { .type = NLA_U32 },
  71 };
  72
  73 /*
  74  * NetLabel Misc Managment Functions
  75  */
  76
  77 /**
  78  * netlbl_mgmt_protocount_inc - Increment the configured labeled protocol count
  79  *
  80  * Description:
  81  * Increment the number of labeled protocol configurations in the current
  82  * NetLabel configuration.  Keep track of this for use in determining if
  83  * NetLabel label enforcement should be active/enabled or not in the LSM.
  84  *
  85  */
  86 void netlbl_mgmt_protocount_inc(void)
  87 {
  88         spin_lock(&netlabel_mgmt_protocount_lock);
  89         netlabel_mgmt_protocount++;
  90         spin_unlock(&netlabel_mgmt_protocount_lock);
  91 }
  92
  93 /**
  94  * netlbl_mgmt_protocount_dec - Decrement the configured labeled protocol count
  95  *
  96  * Description:
  97  * Decrement the number of labeled protocol configurations in the current
  98  * NetLabel configuration.  Keep track of this for use in determining if
  99  * NetLabel label enforcement should be active/enabled or not in the LSM.
 100  *
 101  */
 102 void netlbl_mgmt_protocount_dec(void)
 103 {
 104         spin_lock(&netlabel_mgmt_protocount_lock);
 105         if (netlabel_mgmt_protocount > 0)
 106                 netlabel_mgmt_protocount--;
 107         spin_unlock(&netlabel_mgmt_protocount_lock);
 108 }
 109
 110 /**
 111  * netlbl_mgmt_protocount_value - Return the number of configured protocols
 112  *
 113  * Description:
 114  * Return the number of labeled protocols in the current NetLabel
 115  * configuration.  This value is useful in  determining if NetLabel label
 116  * enforcement should be active/enabled or not in the LSM.
 117  *
 118  */
 119 u32 netlbl_mgmt_protocount_value(void)
 120 {
 121         u32 val;
 122
 123         rcu_read_lock();
 124         val = netlabel_mgmt_protocount;
 125         rcu_read_unlock();
 126
 127         return val;
 128 }
 129
 130 /*
 131  * NetLabel Command Handlers
 132  */
 133
 134 /**
 135  * netlbl_mgmt_add - Handle an ADD message
 136  * @skb: the NETLINK buffer
 137  * @info: the Generic NETLINK info block
 138  *
 139  * Description:
 140  * Process a user generated ADD message and add the domains from the message
 141  * to the hash table.  See netlabel.h for a description of the message format.
 142  * Returns zero on success, negative values on failure.
 143  *
 144  */
 145 static int netlbl_mgmt_add(struct sk_buff *skb, struct genl_info *info)
 146 {
 147         int ret_val = -EINVAL;
 148         struct netlbl_dom_map *entry = NULL;
 149         size_t tmp_size;
 150         u32 tmp_val;
 151         struct netlbl_audit audit_info;
 152
 153         if (!info->attrs[NLBL_MGMT_A_DOMAIN] ||
 154             !info->attrs[NLBL_MGMT_A_PROTOCOL])
 155                 goto add_failure;
 156
 157         netlbl_netlink_auditinfo(skb, &audit_info);
 158
 159         entry = kzalloc(sizeof(*entry), GFP_KERNEL);
 160         if (entry == NULL) {
 161                 ret_val = -ENOMEM;
 162                 goto add_failure;
 163         }
 164         tmp_size = nla_len(info->attrs[NLBL_MGMT_A_DOMAIN]);
 165         entry->domain = kmalloc(tmp_size, GFP_KERNEL);
 166         if (entry->domain == NULL) {
 167                 ret_val = -ENOMEM;
 168                 goto add_failure;
 169         }
 170         entry->type = nla_get_u32(info->attrs[NLBL_MGMT_A_PROTOCOL]);
 171         nla_strlcpy(entry->domain, info->attrs[NLBL_MGMT_A_DOMAIN], tmp_size);
 172
 173         switch (entry->type) {
 174         case NETLBL_NLTYPE_UNLABELED:
 175                 ret_val = netlbl_domhsh_add(entry, &audit_info);
 176                 break;
 177         case NETLBL_NLTYPE_CIPSOV4:
 178                 if (!info->attrs[NLBL_MGMT_A_CV4DOI])
 179                         goto add_failure;
 180
 181                 tmp_val = nla_get_u32(info->attrs[NLBL_MGMT_A_CV4DOI]);
 182                 /* We should be holding a rcu_read_lock() here while we hold
 183                  * the result but since the entry will always be deleted when
 184                  * the CIPSO DOI is deleted we aren't going to keep the
 185                  * lock. */
 186                 rcu_read_lock();
 187                 entry->type_def.cipsov4 = cipso_v4_doi_getdef(tmp_val);
 188                 if (entry->type_def.cipsov4 == NULL) {
 189                         rcu_read_unlock();
 190                         goto add_failure;
 191                 }
 192                 ret_val = netlbl_domhsh_add(entry, &audit_info);
 193                 rcu_read_unlock();
 194                 break;
 195         default:
 196                 goto add_failure;
 197         }
 198         if (ret_val != 0)
 199                 goto add_failure;
 200
 201         return 0;
 202
 203 add_failure:
 204         if (entry)
 205                 kfree(entry->domain);
 206         kfree(entry);
 207         return ret_val;
 208 }
 209
 210 /**
 211  * netlbl_mgmt_remove - Handle a REMOVE message
 212  * @skb: the NETLINK buffer
 213  * @info: the Generic NETLINK info block
 214  *
 215  * Description:
 216  * Process a user generated REMOVE message and remove the specified domain
 217  * mappings.  Returns zero on success, negative values on failure.
 218  *
 219  */
 220 static int netlbl_mgmt_remove(struct sk_buff *skb, struct genl_info *info)
 221 {
 222         char *domain;
 223         struct netlbl_audit audit_info;
 224
 225         if (!info->attrs[NLBL_MGMT_A_DOMAIN])
 226                 return -EINVAL;
 227
 228         netlbl_netlink_auditinfo(skb, &audit_info);
 229
 230         domain = nla_data(info->attrs[NLBL_MGMT_A_DOMAIN]);
 231         return netlbl_domhsh_remove(domain, &audit_info);
 232 }
 233
 234 /**
 235  * netlbl_mgmt_listall_cb - netlbl_domhsh_walk() callback for LISTALL
 236  * @entry: the domain mapping hash table entry
 237  * @arg: the netlbl_domhsh_walk_arg structure
 238  *
 239  * Description:
 240  * This function is designed to be used as a callback to the
 241  * netlbl_domhsh_walk() function for use in generating a response for a LISTALL
 242  * message.  Returns the size of the message on success, negative values on
 243  * failure.
 244  *
 245  */
 246 static int netlbl_mgmt_listall_cb(struct netlbl_dom_map *entry, void *arg)
 247 {
 248         int ret_val = -ENOMEM;
 249         struct netlbl_domhsh_walk_arg *cb_arg = arg;
 250         void *data;
 251
 252         data = genlmsg_put(cb_arg->skb, NETLINK_CB(cb_arg->nl_cb->skb).pid,
 253                            cb_arg->seq, &netlbl_mgmt_gnl_family,
 254                            NLM_F_MULTI, NLBL_MGMT_C_LISTALL);
 255         if (data == NULL)
 256                 goto listall_cb_failure;
 257
 258         ret_val = nla_put_string(cb_arg->skb,
 259                                  NLBL_MGMT_A_DOMAIN,
 260                                  entry->domain);
 261         if (ret_val != 0)
 262                 goto listall_cb_failure;
 263         ret_val = nla_put_u32(cb_arg->skb, NLBL_MGMT_A_PROTOCOL, entry->type);
 264         if (ret_val != 0)
 265                 goto listall_cb_failure;
 266         switch (entry->type) {
 267         case NETLBL_NLTYPE_CIPSOV4:
 268                 ret_val = nla_put_u32(cb_arg->skb,
 269                                       NLBL_MGMT_A_CV4DOI,
 270                                       entry->type_def.cipsov4->doi);
 271                 if (ret_val != 0)
 272                         goto listall_cb_failure;
 273                 break;
 274         }
 275
 276         cb_arg->seq++;
 277         return genlmsg_end(cb_arg->skb, data);
 278
 279 listall_cb_failure:
 280         genlmsg_cancel(cb_arg->skb, data);
 281         return ret_val;
 282 }
 283
 284 /**
 285  * netlbl_mgmt_listall - Handle a LISTALL message
 286  * @skb: the NETLINK buffer
 287  * @cb: the NETLINK callback
 288  *
 289  * Description:
 290  * Process a user generated LISTALL message and dumps the domain hash table in
 291  * a form suitable for use in a kernel generated LISTALL message.  Returns zero
 292  * on success, negative values on failure.
 293  *
 294  */
 295 static int netlbl_mgmt_listall(struct sk_buff *skb,
 296                                struct netlink_callback *cb)
 297 {
 298         struct netlbl_domhsh_walk_arg cb_arg;
 299         u32 skip_bkt = cb->args[0];
 300         u32 skip_chain = cb->args[1];
 301
 302         cb_arg.nl_cb = cb;
 303         cb_arg.skb = skb;
 304         cb_arg.seq = cb->nlh->nlmsg_seq;
 305
 306         netlbl_domhsh_walk(&skip_bkt,
 307                            &skip_chain,
 308                            netlbl_mgmt_listall_cb,
 309                            &cb_arg);
 310
 311         cb->args[0] = skip_bkt;
 312         cb->args[1] = skip_chain;
 313         return skb->len;
 314 }
 315
 316 /**
 317  * netlbl_mgmt_adddef - Handle an ADDDEF message
 318  * @skb: the NETLINK buffer
 319  * @info: the Generic NETLINK info block
 320  *
 321  * Description:
 322  * Process a user generated ADDDEF message and respond accordingly.  Returns
 323  * zero on success, negative values on failure.
 324  *
 325  */
 326 static int netlbl_mgmt_adddef(struct sk_buff *skb, struct genl_info *info)
 327 {
 328         int ret_val = -EINVAL;
 329         struct netlbl_dom_map *entry = NULL;
 330         u32 tmp_val;
 331         struct netlbl_audit audit_info;
 332
 333         if (!info->attrs[NLBL_MGMT_A_PROTOCOL])
 334                 goto adddef_failure;
 335
 336         netlbl_netlink_auditinfo(skb, &audit_info);
 337
 338         entry = kzalloc(sizeof(*entry), GFP_KERNEL);
 339         if (entry == NULL) {
 340                 ret_val = -ENOMEM;
 341                 goto adddef_failure;
 342         }
 343         entry->type = nla_get_u32(info->attrs[NLBL_MGMT_A_PROTOCOL]);
 344
 345         switch (entry->type) {
 346         case NETLBL_NLTYPE_UNLABELED:
 347                 ret_val = netlbl_domhsh_add_default(entry, &audit_info);
 348                 break;
 349         case NETLBL_NLTYPE_CIPSOV4:
 350                 if (!info->attrs[NLBL_MGMT_A_CV4DOI])
 351                         goto adddef_failure;
 352
 353                 tmp_val = nla_get_u32(info->attrs[NLBL_MGMT_A_CV4DOI]);
 354                 /* We should be holding a rcu_read_lock() here while we hold
 355                  * the result but since the entry will always be deleted when
 356                  * the CIPSO DOI is deleted we aren't going to keep the
 357                  * lock. */
 358                 rcu_read_lock();
 359                 entry->type_def.cipsov4 = cipso_v4_doi_getdef(tmp_val);
 360                 if (entry->type_def.cipsov4 == NULL) {
 361                         rcu_read_unlock();
 362                         goto adddef_failure;
 363                 }
 364                 ret_val = netlbl_domhsh_add_default(entry, &audit_info);
 365                 rcu_read_unlock();
 366                 break;
 367         default:
 368                 goto adddef_failure;
 369         }
 370         if (ret_val != 0)
 371                 goto adddef_failure;
 372
 373         return 0;
 374
 375 adddef_failure:
 376         kfree(entry);
 377         return ret_val;
 378 }
 379
 380 /**
 381  * netlbl_mgmt_removedef - Handle a REMOVEDEF message
 382  * @skb: the NETLINK buffer
 383  * @info: the Generic NETLINK info block
 384  *
 385  * Description:
 386  * Process a user generated REMOVEDEF message and remove the default domain
 387  * mapping.  Returns zero on success, negative values on failure.
 388  *
 389  */
 390 static int netlbl_mgmt_removedef(struct sk_buff *skb, struct genl_info *info)
 391 {
 392         struct netlbl_audit audit_info;
 393
 394         netlbl_netlink_auditinfo(skb, &audit_info);
 395
 396         return netlbl_domhsh_remove_default(&audit_info);
 397 }
 398
 399 /**
 400  * netlbl_mgmt_listdef - Handle a LISTDEF message
 401  * @skb: the NETLINK buffer
 402  * @info: the Generic NETLINK info block
 403  *
 404  * Description:
 405  * Process a user generated LISTDEF message and dumps the default domain
 406  * mapping in a form suitable for use in a kernel generated LISTDEF message.
 407  * Returns zero on success, negative values on failure.
 408  *
 409  */
 410 static int netlbl_mgmt_listdef(struct sk_buff *skb, struct genl_info *info)
 411 {
 412         int ret_val = -ENOMEM;
 413         struct sk_buff *ans_skb = NULL;
 414         void *data;
 415         struct netlbl_dom_map *entry;
 416
 417         ans_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 418         if (ans_skb == NULL)
 419                 return -ENOMEM;
 420         data = genlmsg_put_reply(ans_skb, info, &netlbl_mgmt_gnl_family,
 421                                  0, NLBL_MGMT_C_LISTDEF);
 422         if (data == NULL)
 423                 goto listdef_failure;
 424
 425         rcu_read_lock();
 426         entry = netlbl_domhsh_getentry(NULL);
 427         if (entry == NULL) {
 428                 ret_val = -ENOENT;
 429                 goto listdef_failure_lock;
 430         }
 431         ret_val = nla_put_u32(ans_skb, NLBL_MGMT_A_PROTOCOL, entry->type);
 432         if (ret_val != 0)
 433                 goto listdef_failure_lock;
 434         switch (entry->type) {
 435         case NETLBL_NLTYPE_CIPSOV4:
 436                 ret_val = nla_put_u32(ans_skb,
 437                                       NLBL_MGMT_A_CV4DOI,
 438                                       entry->type_def.cipsov4->doi);
 439                 if (ret_val != 0)
 440                         goto listdef_failure_lock;
 441                 break;
 442         }
 443         rcu_read_unlock();
 444
 445         genlmsg_end(ans_skb, data);
 446
 447         ret_val = genlmsg_reply(ans_skb, info);
 448         if (ret_val != 0)
 449                 goto listdef_failure;
 450         return 0;
 451
 452 listdef_failure_lock:
 453         rcu_read_unlock();
 454 listdef_failure:
 455         kfree_skb(ans_skb);
 456         return ret_val;
 457 }
 458
 459 /**
 460  * netlbl_mgmt_protocols_cb - Write an individual PROTOCOL message response
 461  * @skb: the skb to write to
 462  * @seq: the NETLINK sequence number
 463  * @cb: the NETLINK callback
 464  * @protocol: the NetLabel protocol to use in the message
 465  *
 466  * Description:
 467  * This function is to be used in conjunction with netlbl_mgmt_protocols() to
 468  * answer a application's PROTOCOLS message.  Returns the size of the message
 469  * on success, negative values on failure.
 470  *
 471  */
 472 static int netlbl_mgmt_protocols_cb(struct sk_buff *skb,
 473                                     struct netlink_callback *cb,
 474                                     u32 protocol)
 475 {
 476         int ret_val = -ENOMEM;
 477         void *data;
 478
 479         data = genlmsg_put(skb, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq,
 480                            &netlbl_mgmt_gnl_family, NLM_F_MULTI,
 481                            NLBL_MGMT_C_PROTOCOLS);
 482         if (data == NULL)
 483                 goto protocols_cb_failure;
 484
 485         ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL, protocol);
 486         if (ret_val != 0)
 487                 goto protocols_cb_failure;
 488
 489         return genlmsg_end(skb, data);
 490
 491 protocols_cb_failure:
 492         genlmsg_cancel(skb, data);
 493         return ret_val;
 494 }
 495
 496 /**
 497  * netlbl_mgmt_protocols - Handle a PROTOCOLS message
 498  * @skb: the NETLINK buffer
 499  * @cb: the NETLINK callback
 500  *
 501  * Description:
 502  * Process a user generated PROTOCOLS message and respond accordingly.
 503  *
 504  */
 505 static int netlbl_mgmt_protocols(struct sk_buff *skb,
 506                                  struct netlink_callback *cb)
 507 {
 508         u32 protos_sent = cb->args[0];
 509
 510         if (protos_sent == 0) {
 511                 if (netlbl_mgmt_protocols_cb(skb,
 512                                              cb,
 513                                              NETLBL_NLTYPE_UNLABELED) < 0)
 514                         goto protocols_return;
 515                 protos_sent++;
 516         }
 517         if (protos_sent == 1) {
 518                 if (netlbl_mgmt_protocols_cb(skb,
 519                                              cb,
 520                                              NETLBL_NLTYPE_CIPSOV4) < 0)
 521                         goto protocols_return;
 522                 protos_sent++;
 523         }
 524
 525 protocols_return:
 526         cb->args[0] = protos_sent;
 527         return skb->len;
 528 }
 529
 530 /**
 531  * netlbl_mgmt_version - Handle a VERSION message
 532  * @skb: the NETLINK buffer
 533  * @info: the Generic NETLINK info block
 534  *
 535  * Description:
 536  * Process a user generated VERSION message and respond accordingly.  Returns
 537  * zero on success, negative values on failure.
 538  *
 539  */
 540 static int netlbl_mgmt_version(struct sk_buff *skb, struct genl_info *info)
 541 {
 542         int ret_val = -ENOMEM;
 543         struct sk_buff *ans_skb = NULL;
 544         void *data;
 545
 546         ans_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 547         if (ans_skb == NULL)
 548                 return -ENOMEM;
 549         data = genlmsg_put_reply(ans_skb, info, &netlbl_mgmt_gnl_family,
 550                                  0, NLBL_MGMT_C_VERSION);
 551         if (data == NULL)
 552                 goto version_failure;
 553
 554         ret_val = nla_put_u32(ans_skb,
 555                               NLBL_MGMT_A_VERSION,
 556                               NETLBL_PROTO_VERSION);
 557         if (ret_val != 0)
 558                 goto version_failure;
 559
 560         genlmsg_end(ans_skb, data);
 561
 562         ret_val = genlmsg_reply(ans_skb, info);
 563         if (ret_val != 0)
 564                 goto version_failure;
 565         return 0;
 566
 567 version_failure:
 568         kfree_skb(ans_skb);
 569         return ret_val;
 570 }
 571
 572
 573 /*
 574  * NetLabel Generic NETLINK Command Definitions
 575  */
 576
 577 static struct genl_ops netlbl_mgmt_genl_c_add = {
 578         .cmd = NLBL_MGMT_C_ADD,
 579         .flags = GENL_ADMIN_PERM,
 580         .policy = netlbl_mgmt_genl_policy,
 581         .doit = netlbl_mgmt_add,
 582         .dumpit = NULL,
 583 };
 584
 585 static struct genl_ops netlbl_mgmt_genl_c_remove = {
 586         .cmd = NLBL_MGMT_C_REMOVE,
 587         .flags = GENL_ADMIN_PERM,
 588         .policy = netlbl_mgmt_genl_policy,
 589         .doit = netlbl_mgmt_remove,
 590         .dumpit = NULL,
 591 };
 592
 593 static struct genl_ops netlbl_mgmt_genl_c_listall = {
 594         .cmd = NLBL_MGMT_C_LISTALL,
 595         .flags = 0,
 596         .policy = netlbl_mgmt_genl_policy,
 597         .doit = NULL,
 598         .dumpit = netlbl_mgmt_listall,
 599 };
 600
 601 static struct genl_ops netlbl_mgmt_genl_c_adddef = {
 602         .cmd = NLBL_MGMT_C_ADDDEF,
 603         .flags = GENL_ADMIN_PERM,
 604         .policy = netlbl_mgmt_genl_policy,
 605         .doit = netlbl_mgmt_adddef,
 606         .dumpit = NULL,
 607 };
 608
 609 static struct genl_ops netlbl_mgmt_genl_c_removedef = {
 610         .cmd = NLBL_MGMT_C_REMOVEDEF,
 611         .flags = GENL_ADMIN_PERM,
 612         .policy = netlbl_mgmt_genl_policy,
 613         .doit = netlbl_mgmt_removedef,
 614         .dumpit = NULL,
 615 };
 616
 617 static struct genl_ops netlbl_mgmt_genl_c_listdef = {
 618         .cmd = NLBL_MGMT_C_LISTDEF,
 619         .flags = 0,
 620         .policy = netlbl_mgmt_genl_policy,
 621         .doit = netlbl_mgmt_listdef,
 622         .dumpit = NULL,
 623 };
 624
 625 static struct genl_ops netlbl_mgmt_genl_c_protocols = {
 626         .cmd = NLBL_MGMT_C_PROTOCOLS,
 627         .flags = 0,
 628         .policy = netlbl_mgmt_genl_policy,
 629         .doit = NULL,
 630         .dumpit = netlbl_mgmt_protocols,
 631 };
 632
 633 static struct genl_ops netlbl_mgmt_genl_c_version = {
 634         .cmd = NLBL_MGMT_C_VERSION,
 635         .flags = 0,
 636         .policy = netlbl_mgmt_genl_policy,
 637         .doit = netlbl_mgmt_version,
 638         .dumpit = NULL,
 639 };
 640
 641 /*
 642  * NetLabel Generic NETLINK Protocol Functions
 643  */
 644
 645 /**
 646  * netlbl_mgmt_genl_init - Register the NetLabel management component
 647  *
 648  * Description:
 649  * Register the NetLabel management component with the Generic NETLINK
 650  * mechanism.  Returns zero on success, negative values on failure.
 651  *
 652  */
 653 int netlbl_mgmt_genl_init(void)
 654 {
 655         int ret_val;
 656
 657         ret_val = genl_register_family(&netlbl_mgmt_gnl_family);
 658         if (ret_val != 0)
 659                 return ret_val;
 660
 661         ret_val = genl_register_ops(&netlbl_mgmt_gnl_family,
 662                                     &netlbl_mgmt_genl_c_add);
 663         if (ret_val != 0)
 664                 return ret_val;
 665         ret_val = genl_register_ops(&netlbl_mgmt_gnl_family,
 666                                     &netlbl_mgmt_genl_c_remove);
 667         if (ret_val != 0)
 668                 return ret_val;
 669         ret_val = genl_register_ops(&netlbl_mgmt_gnl_family,
 670                                     &netlbl_mgmt_genl_c_listall);
 671         if (ret_val != 0)
 672                 return ret_val;
 673         ret_val = genl_register_ops(&netlbl_mgmt_gnl_family,
 674                                     &netlbl_mgmt_genl_c_adddef);
 675         if (ret_val != 0)
 676                 return ret_val;
 677         ret_val = genl_register_ops(&netlbl_mgmt_gnl_family,
 678                                     &netlbl_mgmt_genl_c_removedef);
 679         if (ret_val != 0)
 680                 return ret_val;
 681         ret_val = genl_register_ops(&netlbl_mgmt_gnl_family,
 682                                     &netlbl_mgmt_genl_c_listdef);
 683         if (ret_val != 0)
 684                 return ret_val;
 685         ret_val = genl_register_ops(&netlbl_mgmt_gnl_family,
 686                                     &netlbl_mgmt_genl_c_protocols);
 687         if (ret_val != 0)
 688                 return ret_val;
 689         ret_val = genl_register_ops(&netlbl_mgmt_gnl_family,
 690                                     &netlbl_mgmt_genl_c_version);
 691         if (ret_val != 0)
 692                 return ret_val;
 693
 694         return 0;
 695 }