Padma, Santhosh Kumar | d7cc079 | 2016-06-28 18:54:12 +0530 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (c) 2016 The Linux Foundation. All rights reserved. |
| 3 | * |
| 4 | * Permission to use, copy, modify, and/or distribute this software for |
| 5 | * any purpose with or without fee is hereby granted, provided that the |
| 6 | * above copyright notice and this permission notice appear in all |
| 7 | * copies. |
| 8 | * |
| 9 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL |
| 10 | * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED |
| 11 | * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE |
| 12 | * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL |
| 13 | * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR |
| 14 | * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER |
| 15 | * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR |
| 16 | * PERFORMANCE OF THIS SOFTWARE. |
| 17 | */ |
| 18 | |
| 19 | /** |
| 20 | * DOC : wlan_hdd_disa.c |
| 21 | * |
| 22 | * WLAN Host Device Driver file for DISA certification |
| 23 | * |
| 24 | */ |
| 25 | |
| 26 | #include "wlan_hdd_disa.h" |
| 27 | #include "sme_api.h" |
| 28 | |
| 29 | #define ENCRYPT_DECRYPT_CONTEXT_MAGIC 0x4475354 |
| 30 | #define WLAN_WAIT_TIME_ENCRYPT_DECRYPT 1000 |
| 31 | |
| 32 | |
| 33 | /** |
| 34 | * hdd_encrypt_decrypt_msg_context - hdd encrypt/decrypt message context |
| 35 | * |
| 36 | * @magic: magic number |
| 37 | * @completion: Completion variable for encrypt/decrypt message |
| 38 | * @response_event: encrypt/decrypt message request wait event |
| 39 | */ |
| 40 | struct hdd_encrypt_decrypt_msg_context { |
| 41 | unsigned int magic; |
| 42 | struct completion completion; |
| 43 | struct sir_encrypt_decrypt_rsp_params response; |
| 44 | }; |
| 45 | static struct hdd_encrypt_decrypt_msg_context encrypt_decrypt_msg_context; |
| 46 | |
| 47 | /** |
| 48 | * hdd_encrypt_decrypt_msg_cb () - sends encrypt/decrypt data to user space |
| 49 | * @encrypt_decrypt_rsp_params: encrypt/decrypt response parameters |
| 50 | * |
| 51 | * Return: none |
| 52 | */ |
| 53 | static void hdd_encrypt_decrypt_msg_cb(void *hdd_context, |
| 54 | struct sir_encrypt_decrypt_rsp_params *encrypt_decrypt_rsp_params) |
| 55 | { |
| 56 | hdd_context_t *hdd_ctx = hdd_context; |
| 57 | int ret; |
| 58 | struct hdd_encrypt_decrypt_msg_context *context; |
| 59 | |
| 60 | ENTER(); |
| 61 | |
| 62 | ret = wlan_hdd_validate_context(hdd_ctx); |
| 63 | if (ret) |
| 64 | return; |
| 65 | |
| 66 | if (!encrypt_decrypt_rsp_params) { |
| 67 | hdd_err("rsp params is NULL"); |
| 68 | return; |
| 69 | } |
| 70 | |
| 71 | print_hex_dump(KERN_INFO, "Data in hdd_encrypt_decrypt_msg_cb: ", |
| 72 | DUMP_PREFIX_NONE, 16, 1, |
| 73 | encrypt_decrypt_rsp_params->data, |
| 74 | encrypt_decrypt_rsp_params->data_length, 0); |
| 75 | |
| 76 | hdd_err("vdev_id %d,status %d data_length %d", |
| 77 | encrypt_decrypt_rsp_params->vdev_id, |
| 78 | encrypt_decrypt_rsp_params->status, |
| 79 | encrypt_decrypt_rsp_params->data_length); |
| 80 | |
| 81 | spin_lock(&hdd_context_lock); |
| 82 | |
| 83 | context = &encrypt_decrypt_msg_context; |
| 84 | /* The caller presumably timed out so there is nothing we can do */ |
| 85 | if (context->magic != ENCRYPT_DECRYPT_CONTEXT_MAGIC) { |
| 86 | spin_unlock(&hdd_context_lock); |
| 87 | return; |
| 88 | } |
| 89 | |
| 90 | /* context is valid so caller is still waiting */ |
| 91 | context->response = *encrypt_decrypt_rsp_params; |
| 92 | |
| 93 | if (encrypt_decrypt_rsp_params->data_length) { |
| 94 | context->response.data = |
| 95 | qdf_mem_malloc(sizeof(uint8_t) * |
| 96 | encrypt_decrypt_rsp_params->data_length); |
| 97 | if (context->response.data == NULL) { |
| 98 | hdd_err("cdf_mem_alloc failed for data"); |
| 99 | spin_unlock(&hdd_context_lock); |
| 100 | return; |
| 101 | } |
| 102 | qdf_mem_copy(context->response.data, |
| 103 | encrypt_decrypt_rsp_params->data, |
| 104 | encrypt_decrypt_rsp_params->data_length); |
| 105 | } |
| 106 | |
| 107 | /* |
| 108 | * Indicate to calling thread that |
| 109 | * response data is available |
| 110 | */ |
| 111 | context->magic = 0; |
| 112 | |
| 113 | complete(&context->completion); |
| 114 | |
| 115 | spin_unlock(&hdd_context_lock); |
| 116 | |
| 117 | |
| 118 | EXIT(); |
| 119 | } |
| 120 | |
| 121 | |
| 122 | /** |
| 123 | * hdd_encrypt_decrypt_msg_cb () - sends encrypt/decrypt data to user space |
| 124 | * @encrypt_decrypt_rsp_params: encrypt/decrypt response parameters |
| 125 | * |
| 126 | * Return: none |
| 127 | */ |
| 128 | static int hdd_post_encrypt_decrypt_msg_rsp(hdd_context_t *hdd_ctx, |
| 129 | struct sir_encrypt_decrypt_rsp_params *encrypt_decrypt_rsp_params) |
| 130 | { |
| 131 | struct sk_buff *skb; |
| 132 | uint32_t nl_buf_len; |
| 133 | |
| 134 | ENTER(); |
| 135 | |
| 136 | nl_buf_len = encrypt_decrypt_rsp_params->data_length + NLA_HDRLEN; |
| 137 | |
| 138 | skb = cfg80211_vendor_cmd_alloc_reply_skb(hdd_ctx->wiphy, nl_buf_len); |
| 139 | if (!skb) { |
| 140 | hdd_err(FL("cfg80211_vendor_cmd_alloc_reply_skb failed")); |
| 141 | return -ENOMEM; |
| 142 | } |
| 143 | |
| 144 | if (encrypt_decrypt_rsp_params->data_length) { |
| 145 | if (nla_put(skb, QCA_WLAN_VENDOR_ATTR_ENCRYPTION_TEST_DATA, |
| 146 | encrypt_decrypt_rsp_params->data_length, |
| 147 | encrypt_decrypt_rsp_params->data)) { |
| 148 | hdd_err(FL("put fail")); |
| 149 | goto nla_put_failure; |
| 150 | } |
| 151 | } |
| 152 | |
| 153 | cfg80211_vendor_cmd_reply(skb); |
| 154 | EXIT(); |
| 155 | return 0; |
| 156 | |
| 157 | nla_put_failure: |
| 158 | kfree_skb(skb); |
| 159 | return -EINVAL; |
| 160 | } |
| 161 | |
| 162 | /** |
| 163 | * hdd_fill_encrypt_decrypt_params () - parses data from user space |
| 164 | * and fills encrypt/decrypt parameters |
| 165 | * @encrypt_decrypt_params: encrypt/decrypt request parameters |
| 166 | * @adapter : adapter context |
| 167 | * @data: Pointer to data |
| 168 | * @data_len: Data length |
| 169 | * |
| 170 | Return: 0 on success, negative errno on failure |
| 171 | */ |
| 172 | static int hdd_fill_encrypt_decrypt_params(struct encrypt_decrypt_req_params |
| 173 | *encrypt_decrypt_params, |
| 174 | hdd_adapter_t *adapter, |
| 175 | const void *data, |
| 176 | int data_len) |
| 177 | { |
| 178 | struct nlattr *tb[QCA_WLAN_VENDOR_ATTR_ENCRYPTION_TEST_MAX + 1]; |
| 179 | uint8_t len, mac_hdr_len; |
| 180 | uint8_t *tmp; |
| 181 | uint8_t fc[2]; |
| 182 | |
| 183 | if (nla_parse(tb, QCA_WLAN_VENDOR_ATTR_ENCRYPTION_TEST_MAX, |
| 184 | data, data_len, NULL)) { |
| 185 | hdd_err("Invalid ATTR"); |
| 186 | return -EINVAL; |
| 187 | } |
| 188 | |
| 189 | encrypt_decrypt_params->vdev_id = adapter->sessionId; |
| 190 | hdd_err("vdev_id : %d", encrypt_decrypt_params->vdev_id); |
| 191 | |
| 192 | if (!tb[QCA_WLAN_VENDOR_ATTR_ENCRYPTION_TEST_NEEDS_DECRYPTION]) { |
| 193 | hdd_err("attr flag NEEDS_DECRYPTION not present"); |
| 194 | encrypt_decrypt_params->key_flag = WMI_ENCRYPT; |
| 195 | } else { |
| 196 | hdd_err("attr flag NEEDS_DECRYPTION present"); |
| 197 | encrypt_decrypt_params->key_flag = WMI_DECRYPT; |
| 198 | } |
| 199 | hdd_err("Key flag : %d", encrypt_decrypt_params->key_flag); |
| 200 | |
| 201 | if (!tb[QCA_WLAN_VENDOR_ATTR_ENCRYPTION_TEST_KEYID]) { |
| 202 | hdd_err("attr key id failed"); |
| 203 | return -EINVAL; |
| 204 | } |
| 205 | encrypt_decrypt_params->key_idx = nla_get_u8(tb |
| 206 | [QCA_WLAN_VENDOR_ATTR_ENCRYPTION_TEST_KEYID]); |
| 207 | hdd_err("Key Idx : %d", encrypt_decrypt_params->key_idx); |
| 208 | |
| 209 | if (!tb[QCA_WLAN_VENDOR_ATTR_ENCRYPTION_TEST_CIPHER]) { |
| 210 | hdd_err("attr Cipher failed"); |
| 211 | return -EINVAL; |
| 212 | } |
| 213 | encrypt_decrypt_params->key_cipher = nla_get_u32(tb |
| 214 | [QCA_WLAN_VENDOR_ATTR_ENCRYPTION_TEST_CIPHER]); |
| 215 | hdd_err("key_cipher : %d", encrypt_decrypt_params->key_cipher); |
| 216 | |
| 217 | if (!tb[QCA_WLAN_VENDOR_ATTR_ENCRYPTION_TEST_TK]) { |
| 218 | hdd_err("attr TK failed"); |
| 219 | return -EINVAL; |
| 220 | } |
| 221 | encrypt_decrypt_params->key_len = |
| 222 | nla_len(tb[QCA_WLAN_VENDOR_ATTR_ENCRYPTION_TEST_TK]); |
| 223 | if (!encrypt_decrypt_params->key_len) { |
| 224 | hdd_err("Invalid TK length"); |
| 225 | return -EINVAL; |
| 226 | } |
| 227 | hdd_err("Key len : %d", encrypt_decrypt_params->key_len); |
| 228 | |
| 229 | if (encrypt_decrypt_params->key_len > SIR_MAC_MAX_KEY_LENGTH) |
| 230 | encrypt_decrypt_params->key_len = SIR_MAC_MAX_KEY_LENGTH; |
| 231 | |
| 232 | tmp = nla_data(tb[QCA_WLAN_VENDOR_ATTR_ENCRYPTION_TEST_TK]); |
| 233 | |
| 234 | qdf_mem_copy(encrypt_decrypt_params->key_data, tmp, |
| 235 | encrypt_decrypt_params->key_len); |
| 236 | |
| 237 | print_hex_dump(KERN_INFO, "Key : ", DUMP_PREFIX_NONE, 16, 1, |
| 238 | &encrypt_decrypt_params->key_data, |
| 239 | encrypt_decrypt_params->key_len, 0); |
| 240 | |
| 241 | if (!tb[QCA_WLAN_VENDOR_ATTR_ENCRYPTION_TEST_PN]) { |
| 242 | hdd_err("attr PN failed"); |
| 243 | return -EINVAL; |
| 244 | } |
| 245 | len = nla_len(tb[QCA_WLAN_VENDOR_ATTR_ENCRYPTION_TEST_PN]); |
| 246 | if (!len) { |
| 247 | hdd_err("Invalid PN length"); |
| 248 | return -EINVAL; |
| 249 | } |
| 250 | |
| 251 | tmp = nla_data(tb[QCA_WLAN_VENDOR_ATTR_ENCRYPTION_TEST_PN]); |
| 252 | |
| 253 | qdf_mem_copy(encrypt_decrypt_params->pn, tmp, len); |
| 254 | |
| 255 | print_hex_dump(KERN_INFO, "PN received : ", DUMP_PREFIX_NONE, 16, 1, |
| 256 | &encrypt_decrypt_params->pn, len, 0); |
| 257 | |
| 258 | if (!tb[QCA_WLAN_VENDOR_ATTR_ENCRYPTION_TEST_DATA]) { |
| 259 | hdd_err("attr header failed"); |
| 260 | return -EINVAL; |
| 261 | } |
| 262 | len = nla_len(tb[QCA_WLAN_VENDOR_ATTR_ENCRYPTION_TEST_DATA]); |
| 263 | if (!len) { |
| 264 | hdd_err("Invalid header and payload length"); |
| 265 | return -EINVAL; |
| 266 | } |
| 267 | |
| 268 | hdd_err("Header and Payload length %d ", len); |
| 269 | |
| 270 | tmp = nla_data(tb[QCA_WLAN_VENDOR_ATTR_ENCRYPTION_TEST_DATA]); |
| 271 | |
| 272 | print_hex_dump(KERN_INFO, "Header and Payload received: ", |
| 273 | DUMP_PREFIX_NONE, 16, 1, |
| 274 | tmp, len, 0); |
| 275 | |
| 276 | mac_hdr_len = MIN_MAC_HEADER_LEN; |
| 277 | |
| 278 | /* |
| 279 | * Check to find out address 4. Address 4 is present if ToDS and FromDS |
| 280 | * are 1 and data representation is little endian. |
| 281 | */ |
| 282 | fc[1] = *tmp; |
| 283 | fc[0] = *(tmp + 1); |
| 284 | if ((fc[0] & 0x03) == 0x03) { |
| 285 | hdd_err("Address 4 is present"); |
| 286 | mac_hdr_len += IEEE80211_ADDR_LEN; |
| 287 | } |
| 288 | |
| 289 | /* |
| 290 | * Check to find out Qos control field. Qos control field is present |
| 291 | * if msb of subtype field is 1 and data representation is |
| 292 | * little endian. |
| 293 | */ |
| 294 | if (fc[1] & 0x80) { |
| 295 | hdd_err("Qos control is present"); |
| 296 | mac_hdr_len += QOS_CONTROL_LEN; |
| 297 | } |
| 298 | |
| 299 | hdd_err("mac_hdr_len %d", mac_hdr_len); |
| 300 | |
| 301 | qdf_mem_copy(encrypt_decrypt_params->mac_header, |
| 302 | tmp, mac_hdr_len); |
| 303 | |
| 304 | print_hex_dump(KERN_INFO, "Header received in request: ", |
| 305 | DUMP_PREFIX_NONE, 16, 1, |
| 306 | encrypt_decrypt_params->mac_header, |
| 307 | mac_hdr_len, 0); |
| 308 | |
| 309 | encrypt_decrypt_params->data_len = |
| 310 | len - mac_hdr_len; |
| 311 | |
| 312 | hdd_err("Payload length : %d", encrypt_decrypt_params->data_len); |
| 313 | |
| 314 | if (encrypt_decrypt_params->data_len) { |
| 315 | encrypt_decrypt_params->data = |
| 316 | qdf_mem_malloc(sizeof(uint8_t) * |
| 317 | encrypt_decrypt_params->data_len); |
| 318 | |
| 319 | if (encrypt_decrypt_params->data == NULL) { |
| 320 | hdd_err("cdf_mem_alloc failed for data"); |
| 321 | return -ENOMEM; |
| 322 | } |
| 323 | |
| 324 | qdf_mem_copy(encrypt_decrypt_params->data, |
| 325 | tmp + mac_hdr_len, |
| 326 | encrypt_decrypt_params->data_len); |
| 327 | |
| 328 | print_hex_dump(KERN_INFO, "Data received in request: ", |
| 329 | DUMP_PREFIX_NONE, 16, 1, |
| 330 | encrypt_decrypt_params->data, |
| 331 | encrypt_decrypt_params->data_len, 0); |
| 332 | } |
| 333 | |
| 334 | return 0; |
| 335 | } |
| 336 | |
| 337 | /** |
| 338 | * hdd_encrypt_decrypt_msg () - process encrypt/decrypt message |
| 339 | * @adapter : adapter context |
| 340 | * @hdd_ctx: hdd context |
| 341 | * @data: Pointer to data |
| 342 | * @data_len: Data length |
| 343 | * |
| 344 | Return: 0 on success, negative errno on failure |
| 345 | */ |
| 346 | static int hdd_encrypt_decrypt_msg(hdd_adapter_t *adapter, |
| 347 | hdd_context_t *hdd_ctx, |
| 348 | const void *data, |
| 349 | int data_len) |
| 350 | { |
| 351 | struct encrypt_decrypt_req_params encrypt_decrypt_params = {0}; |
| 352 | QDF_STATUS qdf_status; |
| 353 | int ret; |
| 354 | struct hdd_encrypt_decrypt_msg_context *context; |
| 355 | unsigned long rc; |
| 356 | |
| 357 | ret = hdd_fill_encrypt_decrypt_params(&encrypt_decrypt_params, |
| 358 | adapter, data, data_len); |
| 359 | if (ret) |
| 360 | return ret; |
| 361 | |
| 362 | spin_lock(&hdd_context_lock); |
| 363 | context = &encrypt_decrypt_msg_context; |
| 364 | context->magic = ENCRYPT_DECRYPT_CONTEXT_MAGIC; |
| 365 | INIT_COMPLETION(context->completion); |
| 366 | spin_unlock(&hdd_context_lock); |
| 367 | |
| 368 | qdf_status = sme_encrypt_decrypt_msg(hdd_ctx->hHal, |
| 369 | &encrypt_decrypt_params); |
| 370 | |
| 371 | qdf_mem_free(encrypt_decrypt_params.data); |
| 372 | |
| 373 | if (!QDF_IS_STATUS_SUCCESS(qdf_status)) { |
| 374 | hdd_err("Unable to post encrypt/decrypt message"); |
| 375 | return -EINVAL; |
| 376 | } |
| 377 | |
| 378 | rc = wait_for_completion_timeout(&context->completion, |
| 379 | msecs_to_jiffies(WLAN_WAIT_TIME_ENCRYPT_DECRYPT)); |
| 380 | |
| 381 | spin_lock(&hdd_context_lock); |
| 382 | if (!rc && (context->magic == |
| 383 | ENCRYPT_DECRYPT_CONTEXT_MAGIC)) { |
| 384 | hdd_err("Target response timed out"); |
| 385 | context->magic = 0; |
| 386 | spin_unlock(&hdd_context_lock); |
| 387 | return -ETIMEDOUT; |
| 388 | } |
| 389 | |
| 390 | spin_unlock(&hdd_context_lock); |
| 391 | ret = hdd_post_encrypt_decrypt_msg_rsp(hdd_ctx, |
| 392 | &encrypt_decrypt_msg_context.response); |
| 393 | if (ret) |
| 394 | hdd_err("Failed to post encrypt/decrypt message response"); |
| 395 | |
| 396 | qdf_mem_free(encrypt_decrypt_msg_context.response.data); |
| 397 | |
| 398 | EXIT(); |
| 399 | return ret; |
| 400 | } |
| 401 | |
| 402 | /** |
| 403 | * hdd_encrypt_decrypt_init () - exposes encrypt/decrypt initialization |
| 404 | * functionality |
| 405 | * @hdd_ctx: hdd context |
| 406 | * |
| 407 | Return: 0 on success, negative errno on failure |
| 408 | */ |
| 409 | int hdd_encrypt_decrypt_init(hdd_context_t *hdd_ctx) |
| 410 | { |
| 411 | QDF_STATUS status; |
| 412 | |
| 413 | init_completion(&encrypt_decrypt_msg_context.completion); |
| 414 | |
| 415 | status = sme_encrypt_decrypt_msg_register_callback(hdd_ctx->hHal, |
| 416 | hdd_encrypt_decrypt_msg_cb); |
| 417 | if (!QDF_IS_STATUS_SUCCESS(status)) { |
| 418 | hdd_err("encrypt/decrypt callback failed %d", status); |
| 419 | return -EINVAL; |
| 420 | } |
| 421 | return 0; |
| 422 | } |
| 423 | |
| 424 | /** |
| 425 | * hdd_encrypt_decrypt_deinit () - exposes encrypt/decrypt deinitialization |
| 426 | * functionality |
| 427 | * @hdd_ctx: hdd context |
| 428 | * |
| 429 | Return: 0 on success, negative errno on failure |
| 430 | */ |
| 431 | int hdd_encrypt_decrypt_deinit(hdd_context_t *hdd_ctx) |
| 432 | { |
| 433 | QDF_STATUS status; |
| 434 | |
| 435 | status = sme_encrypt_decrypt_msg_deregister_callback(hdd_ctx->hHal); |
| 436 | if (!QDF_IS_STATUS_SUCCESS(status)) |
| 437 | hdd_err("De-register encrypt/decrypt callback failed: %d", |
| 438 | status); |
| 439 | return 0; |
| 440 | } |
| 441 | |
| 442 | /** |
| 443 | * __wlan_hdd_cfg80211_encrypt_decrypt_msg () - Encrypt/Decrypt msg |
| 444 | * @wiphy: Pointer to wireless phy |
| 445 | * @wdev: Pointer to wireless device |
| 446 | * @data: Pointer to data |
| 447 | * @data_len: Data length |
| 448 | * |
| 449 | * Return: 0 on success, negative errno on failure |
| 450 | */ |
| 451 | static int __wlan_hdd_cfg80211_encrypt_decrypt_msg(struct wiphy *wiphy, |
| 452 | struct wireless_dev *wdev, |
| 453 | const void *data, |
| 454 | int data_len) |
| 455 | { |
| 456 | hdd_context_t *hdd_ctx = wiphy_priv(wiphy); |
| 457 | struct net_device *dev = wdev->netdev; |
| 458 | hdd_adapter_t *adapter = NULL; |
| 459 | int ret; |
| 460 | |
| 461 | ENTER_DEV(dev); |
| 462 | |
| 463 | ret = wlan_hdd_validate_context(hdd_ctx); |
| 464 | if (ret) |
| 465 | return ret; |
| 466 | |
| 467 | adapter = WLAN_HDD_GET_PRIV_PTR(dev); |
| 468 | |
| 469 | ret = hdd_encrypt_decrypt_msg(adapter, hdd_ctx, data, data_len); |
| 470 | |
| 471 | return ret; |
| 472 | } |
| 473 | |
| 474 | /** |
| 475 | * wlan_hdd_cfg80211_encrypt_decrypt_msg () - Encrypt/Decrypt msg |
| 476 | * @wiphy: Pointer to wireless phy |
| 477 | * @wdev: Pointer to wireless device |
| 478 | * @data: Pointer to data |
| 479 | * @data_len: Data length |
| 480 | * |
| 481 | * Return: 0 on success, negative errno on failure |
| 482 | */ |
| 483 | int wlan_hdd_cfg80211_encrypt_decrypt_msg(struct wiphy *wiphy, |
| 484 | struct wireless_dev *wdev, |
| 485 | const void *data, |
| 486 | int data_len) |
| 487 | { |
| 488 | int ret; |
| 489 | |
| 490 | cds_ssr_protect(__func__); |
| 491 | ret = __wlan_hdd_cfg80211_encrypt_decrypt_msg(wiphy, wdev, |
| 492 | data, data_len); |
| 493 | cds_ssr_unprotect(__func__); |
| 494 | |
| 495 | return ret; |
| 496 | } |