Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 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 | |
Paul Moore | 23bcdc1 | 2007-07-18 12:28:45 -0400 | [diff] [blame] | 45 | /* NetLabel configured protocol count */ |
| 46 | static DEFINE_SPINLOCK(netlabel_mgmt_protocount_lock); |
| 47 | static u32 netlabel_mgmt_protocount = 0; |
| 48 | |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 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 | |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 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, |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 62 | .maxattr = NLBL_MGMT_A_MAX, |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 63 | }; |
| 64 | |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 65 | /* NetLabel Netlink attribute policy */ |
Patrick McHardy | ef7c79e | 2007-06-05 12:38:30 -0700 | [diff] [blame] | 66 | static const struct nla_policy netlbl_mgmt_genl_policy[NLBL_MGMT_A_MAX + 1] = { |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 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 | }; |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 72 | |
| 73 | /* |
Paul Moore | 23bcdc1 | 2007-07-18 12:28:45 -0400 | [diff] [blame] | 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 | { |
Paul Moore | 23bcdc1 | 2007-07-18 12:28:45 -0400 | [diff] [blame] | 88 | spin_lock(&netlabel_mgmt_protocount_lock); |
| 89 | netlabel_mgmt_protocount++; |
| 90 | spin_unlock(&netlabel_mgmt_protocount_lock); |
Paul Moore | 23bcdc1 | 2007-07-18 12:28:45 -0400 | [diff] [blame] | 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 | { |
Paul Moore | 23bcdc1 | 2007-07-18 12:28:45 -0400 | [diff] [blame] | 104 | spin_lock(&netlabel_mgmt_protocount_lock); |
| 105 | if (netlabel_mgmt_protocount > 0) |
| 106 | netlabel_mgmt_protocount--; |
| 107 | spin_unlock(&netlabel_mgmt_protocount_lock); |
Paul Moore | 23bcdc1 | 2007-07-18 12:28:45 -0400 | [diff] [blame] | 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 | /* |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 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; |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 148 | struct netlbl_dom_map *entry = NULL; |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 149 | size_t tmp_size; |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 150 | u32 tmp_val; |
Paul Moore | 95d4e6b | 2006-09-29 17:05:05 -0700 | [diff] [blame] | 151 | struct netlbl_audit audit_info; |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 152 | |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 153 | if (!info->attrs[NLBL_MGMT_A_DOMAIN] || |
| 154 | !info->attrs[NLBL_MGMT_A_PROTOCOL]) |
| 155 | goto add_failure; |
| 156 | |
Paul Moore | 95d4e6b | 2006-09-29 17:05:05 -0700 | [diff] [blame] | 157 | netlbl_netlink_auditinfo(skb, &audit_info); |
| 158 | |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 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: |
Paul Moore | 95d4e6b | 2006-09-29 17:05:05 -0700 | [diff] [blame] | 175 | ret_val = netlbl_domhsh_add(entry, &audit_info); |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 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 | } |
Paul Moore | 95d4e6b | 2006-09-29 17:05:05 -0700 | [diff] [blame] | 192 | ret_val = netlbl_domhsh_add(entry, &audit_info); |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 193 | rcu_read_unlock(); |
| 194 | break; |
| 195 | default: |
| 196 | goto add_failure; |
| 197 | } |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 198 | if (ret_val != 0) |
| 199 | goto add_failure; |
| 200 | |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 201 | return 0; |
| 202 | |
| 203 | add_failure: |
| 204 | if (entry) |
| 205 | kfree(entry->domain); |
| 206 | kfree(entry); |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 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 | { |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 222 | char *domain; |
Paul Moore | 95d4e6b | 2006-09-29 17:05:05 -0700 | [diff] [blame] | 223 | struct netlbl_audit audit_info; |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 224 | |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 225 | if (!info->attrs[NLBL_MGMT_A_DOMAIN]) |
| 226 | return -EINVAL; |
| 227 | |
Paul Moore | 95d4e6b | 2006-09-29 17:05:05 -0700 | [diff] [blame] | 228 | netlbl_netlink_auditinfo(skb, &audit_info); |
| 229 | |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 230 | domain = nla_data(info->attrs[NLBL_MGMT_A_DOMAIN]); |
Paul Moore | 95d4e6b | 2006-09-29 17:05:05 -0700 | [diff] [blame] | 231 | return netlbl_domhsh_remove(domain, &audit_info); |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 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 | |
Thomas Graf | 17c157c | 2006-11-14 19:46:02 -0800 | [diff] [blame] | 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); |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 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); |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 261 | if (ret_val != 0) |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 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); |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 271 | if (ret_val != 0) |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 272 | goto listall_cb_failure; |
| 273 | break; |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 274 | } |
| 275 | |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 276 | cb_arg->seq++; |
| 277 | return genlmsg_end(cb_arg->skb, data); |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 278 | |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 279 | listall_cb_failure: |
| 280 | genlmsg_cancel(cb_arg->skb, data); |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 281 | return ret_val; |
| 282 | } |
| 283 | |
| 284 | /** |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 285 | * netlbl_mgmt_listall - Handle a LISTALL message |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 286 | * @skb: the NETLINK buffer |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 287 | * @cb: the NETLINK callback |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 288 | * |
| 289 | * Description: |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 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. |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 293 | * |
| 294 | */ |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 295 | static int netlbl_mgmt_listall(struct sk_buff *skb, |
| 296 | struct netlink_callback *cb) |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 297 | { |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 298 | struct netlbl_domhsh_walk_arg cb_arg; |
| 299 | u32 skip_bkt = cb->args[0]; |
| 300 | u32 skip_chain = cb->args[1]; |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 301 | |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 302 | cb_arg.nl_cb = cb; |
| 303 | cb_arg.skb = skb; |
| 304 | cb_arg.seq = cb->nlh->nlmsg_seq; |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 305 | |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 306 | netlbl_domhsh_walk(&skip_bkt, |
| 307 | &skip_chain, |
| 308 | netlbl_mgmt_listall_cb, |
| 309 | &cb_arg); |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 310 | |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 311 | cb->args[0] = skip_bkt; |
| 312 | cb->args[1] = skip_chain; |
| 313 | return skb->len; |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 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; |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 329 | struct netlbl_dom_map *entry = NULL; |
| 330 | u32 tmp_val; |
Paul Moore | 95d4e6b | 2006-09-29 17:05:05 -0700 | [diff] [blame] | 331 | struct netlbl_audit audit_info; |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 332 | |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 333 | if (!info->attrs[NLBL_MGMT_A_PROTOCOL]) |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 334 | goto adddef_failure; |
| 335 | |
Paul Moore | 95d4e6b | 2006-09-29 17:05:05 -0700 | [diff] [blame] | 336 | netlbl_netlink_auditinfo(skb, &audit_info); |
| 337 | |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 338 | entry = kzalloc(sizeof(*entry), GFP_KERNEL); |
| 339 | if (entry == NULL) { |
| 340 | ret_val = -ENOMEM; |
| 341 | goto adddef_failure; |
| 342 | } |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 343 | entry->type = nla_get_u32(info->attrs[NLBL_MGMT_A_PROTOCOL]); |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 344 | |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 345 | switch (entry->type) { |
| 346 | case NETLBL_NLTYPE_UNLABELED: |
Paul Moore | 95d4e6b | 2006-09-29 17:05:05 -0700 | [diff] [blame] | 347 | ret_val = netlbl_domhsh_add_default(entry, &audit_info); |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 348 | break; |
| 349 | case NETLBL_NLTYPE_CIPSOV4: |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 350 | if (!info->attrs[NLBL_MGMT_A_CV4DOI]) |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 351 | goto adddef_failure; |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 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. */ |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 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(); |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 362 | goto adddef_failure; |
| 363 | } |
Paul Moore | 95d4e6b | 2006-09-29 17:05:05 -0700 | [diff] [blame] | 364 | ret_val = netlbl_domhsh_add_default(entry, &audit_info); |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 365 | rcu_read_unlock(); |
| 366 | break; |
| 367 | default: |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 368 | goto adddef_failure; |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 369 | } |
| 370 | if (ret_val != 0) |
| 371 | goto adddef_failure; |
| 372 | |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 373 | return 0; |
| 374 | |
| 375 | adddef_failure: |
| 376 | kfree(entry); |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 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 | { |
Paul Moore | 95d4e6b | 2006-09-29 17:05:05 -0700 | [diff] [blame] | 392 | struct netlbl_audit audit_info; |
| 393 | |
| 394 | netlbl_netlink_auditinfo(skb, &audit_info); |
| 395 | |
| 396 | return netlbl_domhsh_remove_default(&audit_info); |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 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; |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 413 | struct sk_buff *ans_skb = NULL; |
| 414 | void *data; |
| 415 | struct netlbl_dom_map *entry; |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 416 | |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 417 | ans_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 418 | if (ans_skb == NULL) |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 419 | return -ENOMEM; |
Thomas Graf | 17c157c | 2006-11-14 19:46:02 -0800 | [diff] [blame] | 420 | data = genlmsg_put_reply(ans_skb, info, &netlbl_mgmt_gnl_family, |
| 421 | 0, NLBL_MGMT_C_LISTDEF); |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 422 | if (data == NULL) |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 423 | goto listdef_failure; |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 424 | |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 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 | |
Thomas Graf | 81878d2 | 2006-11-14 19:45:27 -0800 | [diff] [blame] | 447 | ret_val = genlmsg_reply(ans_skb, info); |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 448 | if (ret_val != 0) |
| 449 | goto listdef_failure; |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 450 | return 0; |
| 451 | |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 452 | listdef_failure_lock: |
| 453 | rcu_read_unlock(); |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 454 | listdef_failure: |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 455 | kfree_skb(ans_skb); |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 456 | return ret_val; |
| 457 | } |
| 458 | |
| 459 | /** |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 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 |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 465 | * |
| 466 | * Description: |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 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. |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 470 | * |
| 471 | */ |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 472 | static int netlbl_mgmt_protocols_cb(struct sk_buff *skb, |
| 473 | struct netlink_callback *cb, |
| 474 | u32 protocol) |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 475 | { |
| 476 | int ret_val = -ENOMEM; |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 477 | void *data; |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 478 | |
Thomas Graf | 17c157c | 2006-11-14 19:46:02 -0800 | [diff] [blame] | 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); |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 482 | if (data == NULL) |
| 483 | goto protocols_cb_failure; |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 484 | |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 485 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL, protocol); |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 486 | if (ret_val != 0) |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 487 | goto protocols_cb_failure; |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 488 | |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 489 | return genlmsg_end(skb, data); |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 490 | |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 491 | protocols_cb_failure: |
| 492 | genlmsg_cancel(skb, data); |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 493 | return ret_val; |
| 494 | } |
| 495 | |
| 496 | /** |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 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 | /** |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 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; |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 544 | void *data; |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 545 | |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 546 | ans_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 547 | if (ans_skb == NULL) |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 548 | return -ENOMEM; |
Thomas Graf | 17c157c | 2006-11-14 19:46:02 -0800 | [diff] [blame] | 549 | data = genlmsg_put_reply(ans_skb, info, &netlbl_mgmt_gnl_family, |
| 550 | 0, NLBL_MGMT_C_VERSION); |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 551 | if (data == NULL) |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 552 | goto version_failure; |
| 553 | |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 554 | ret_val = nla_put_u32(ans_skb, |
| 555 | NLBL_MGMT_A_VERSION, |
| 556 | NETLBL_PROTO_VERSION); |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 557 | if (ret_val != 0) |
| 558 | goto version_failure; |
| 559 | |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 560 | genlmsg_end(ans_skb, data); |
| 561 | |
Thomas Graf | 81878d2 | 2006-11-14 19:45:27 -0800 | [diff] [blame] | 562 | ret_val = genlmsg_reply(ans_skb, info); |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 563 | if (ret_val != 0) |
| 564 | goto version_failure; |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 565 | return 0; |
| 566 | |
| 567 | version_failure: |
| 568 | kfree_skb(ans_skb); |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 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, |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 579 | .flags = GENL_ADMIN_PERM, |
| 580 | .policy = netlbl_mgmt_genl_policy, |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 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, |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 587 | .flags = GENL_ADMIN_PERM, |
| 588 | .policy = netlbl_mgmt_genl_policy, |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 589 | .doit = netlbl_mgmt_remove, |
| 590 | .dumpit = NULL, |
| 591 | }; |
| 592 | |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 593 | static struct genl_ops netlbl_mgmt_genl_c_listall = { |
| 594 | .cmd = NLBL_MGMT_C_LISTALL, |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 595 | .flags = 0, |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 596 | .policy = netlbl_mgmt_genl_policy, |
| 597 | .doit = NULL, |
| 598 | .dumpit = netlbl_mgmt_listall, |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 599 | }; |
| 600 | |
| 601 | static struct genl_ops netlbl_mgmt_genl_c_adddef = { |
| 602 | .cmd = NLBL_MGMT_C_ADDDEF, |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 603 | .flags = GENL_ADMIN_PERM, |
| 604 | .policy = netlbl_mgmt_genl_policy, |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 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, |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 611 | .flags = GENL_ADMIN_PERM, |
| 612 | .policy = netlbl_mgmt_genl_policy, |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 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, |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 620 | .policy = netlbl_mgmt_genl_policy, |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 621 | .doit = netlbl_mgmt_listdef, |
| 622 | .dumpit = NULL, |
| 623 | }; |
| 624 | |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 625 | static struct genl_ops netlbl_mgmt_genl_c_protocols = { |
| 626 | .cmd = NLBL_MGMT_C_PROTOCOLS, |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 627 | .flags = 0, |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 628 | .policy = netlbl_mgmt_genl_policy, |
| 629 | .doit = NULL, |
| 630 | .dumpit = netlbl_mgmt_protocols, |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 631 | }; |
| 632 | |
| 633 | static struct genl_ops netlbl_mgmt_genl_c_version = { |
| 634 | .cmd = NLBL_MGMT_C_VERSION, |
| 635 | .flags = 0, |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 636 | .policy = netlbl_mgmt_genl_policy, |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 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, |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 670 | &netlbl_mgmt_genl_c_listall); |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 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, |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 686 | &netlbl_mgmt_genl_c_protocols); |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 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 | } |