1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2015 Ruslan Bukin <br@bsdpad.com> 5 * Copyright (c) 2018 The FreeBSD Foundation 6 * All rights reserved. 7 * 8 * This software was developed by SRI International and the University of 9 * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237) 10 * ("CTSRD"), as part of the DARPA CRASH research programme. 11 * 12 * Portions of this software were developed by Edward Tomasz Napierala 13 * under sponsorship from the FreeBSD Foundation. 14 * 15 * Redistribution and use in source and binary forms, with or without 16 * modification, are permitted provided that the following conditions 17 * are met: 18 * 1. Redistributions of source code must retain the above copyright 19 * notice, this list of conditions and the following disclaimer. 20 * 2. Redistributions in binary form must reproduce the above copyright 21 * notice, this list of conditions and the following disclaimer in the 22 * documentation and/or other materials provided with the distribution. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 /* 37 * USB template for CDC ACM (serial), CDC ECM (network), and CDC MSC (storage). 38 */ 39 40 #include <sys/cdefs.h> 41 __FBSDID("$FreeBSD$"); 42 43 #ifdef USB_GLOBAL_INCLUDE_FILE 44 #include USB_GLOBAL_INCLUDE_FILE 45 #else 46 #include <sys/stdint.h> 47 #include <sys/stddef.h> 48 #include <sys/param.h> 49 #include <sys/queue.h> 50 #include <sys/types.h> 51 #include <sys/systm.h> 52 #include <sys/kernel.h> 53 #include <sys/bus.h> 54 #include <sys/module.h> 55 #include <sys/lock.h> 56 #include <sys/mutex.h> 57 #include <sys/condvar.h> 58 #include <sys/sysctl.h> 59 #include <sys/sx.h> 60 #include <sys/unistd.h> 61 #include <sys/callout.h> 62 #include <sys/malloc.h> 63 #include <sys/priv.h> 64 65 #include <dev/usb/usb.h> 66 #include <dev/usb/usbdi.h> 67 #include <dev/usb/usb_core.h> 68 #include <dev/usb/usb_cdc.h> 69 #include <dev/usb/usb_ioctl.h> 70 #include <dev/usb/usb_util.h> 71 72 #include <dev/usb/template/usb_template.h> 73 #endif /* USB_GLOBAL_INCLUDE_FILE */ 74 75 #define MODEM_IFACE_0 0 76 #define MODEM_IFACE_1 1 77 78 enum { 79 MULTI_LANG_INDEX, 80 MULTI_MODEM_INDEX, 81 MULTI_ETH_MAC_INDEX, 82 MULTI_ETH_CONTROL_INDEX, 83 MULTI_ETH_DATA_INDEX, 84 MULTI_STORAGE_INDEX, 85 MULTI_CONFIGURATION_INDEX, 86 MULTI_MANUFACTURER_INDEX, 87 MULTI_PRODUCT_INDEX, 88 MULTI_SERIAL_NUMBER_INDEX, 89 MULTI_MAX_INDEX, 90 }; 91 92 #define MULTI_DEFAULT_VENDOR_ID USB_TEMPLATE_VENDOR 93 #define MULTI_DEFAULT_PRODUCT_ID 0x05dc 94 #define MULTI_DEFAULT_MODEM "Virtual serial port" 95 #define MULTI_DEFAULT_ETH_MAC "2A02030405060789AB" 96 #define MULTI_DEFAULT_ETH_CONTROL "Ethernet Comm Interface" 97 #define MULTI_DEFAULT_ETH_DATA "Ethernet Data Interface" 98 #define MULTI_DEFAULT_STORAGE "Mass Storage Interface" 99 #define MULTI_DEFAULT_CONFIGURATION "Default configuration" 100 #define MULTI_DEFAULT_MANUFACTURER USB_TEMPLATE_MANUFACTURER 101 #define MULTI_DEFAULT_PRODUCT "Multifunction Device" 102 /* 103 * The reason for this being called like this is that OSX 104 * derives the device node name from it, resulting in a somewhat 105 * user-friendly "/dev/cu.usbmodemFreeBSD1". And yes, the "1" 106 * needs to be there, otherwise OSX will mangle it. 107 */ 108 #define MULTI_DEFAULT_SERIAL_NUMBER "FreeBSD1" 109 110 static struct usb_string_descriptor multi_modem; 111 static struct usb_string_descriptor multi_eth_mac; 112 static struct usb_string_descriptor multi_eth_control; 113 static struct usb_string_descriptor multi_eth_data; 114 static struct usb_string_descriptor multi_storage; 115 static struct usb_string_descriptor multi_configuration; 116 static struct usb_string_descriptor multi_manufacturer; 117 static struct usb_string_descriptor multi_product; 118 static struct usb_string_descriptor multi_serial_number; 119 120 static struct sysctl_ctx_list multi_ctx_list; 121 122 /* prototypes */ 123 124 static usb_temp_get_string_desc_t multi_get_string_desc; 125 126 static const struct usb_cdc_union_descriptor eth_union_desc = { 127 .bLength = sizeof(eth_union_desc), 128 .bDescriptorType = UDESC_CS_INTERFACE, 129 .bDescriptorSubtype = UDESCSUB_CDC_UNION, 130 .bMasterInterface = 0, /* this is automatically updated */ 131 .bSlaveInterface[0] = 1, /* this is automatically updated */ 132 }; 133 134 static const struct usb_cdc_header_descriptor eth_header_desc = { 135 .bLength = sizeof(eth_header_desc), 136 .bDescriptorType = UDESC_CS_INTERFACE, 137 .bDescriptorSubtype = UDESCSUB_CDC_HEADER, 138 .bcdCDC[0] = 0x10, 139 .bcdCDC[1] = 0x01, 140 }; 141 142 static const struct usb_cdc_ethernet_descriptor eth_enf_desc = { 143 .bLength = sizeof(eth_enf_desc), 144 .bDescriptorType = UDESC_CS_INTERFACE, 145 .bDescriptorSubtype = UDESCSUB_CDC_ENF, 146 .iMacAddress = MULTI_ETH_MAC_INDEX, 147 .bmEthernetStatistics = {0, 0, 0, 0}, 148 .wMaxSegmentSize = {0xEA, 0x05},/* 1514 bytes */ 149 .wNumberMCFilters = {0, 0}, 150 .bNumberPowerFilters = 0, 151 }; 152 153 static const void *eth_control_if_desc[] = { 154 ð_union_desc, 155 ð_header_desc, 156 ð_enf_desc, 157 NULL, 158 }; 159 160 static const struct usb_temp_packet_size bulk_mps = { 161 .mps[USB_SPEED_FULL] = 64, 162 .mps[USB_SPEED_HIGH] = 512, 163 }; 164 165 static const struct usb_temp_packet_size intr_mps = { 166 .mps[USB_SPEED_FULL] = 8, 167 .mps[USB_SPEED_HIGH] = 8, 168 }; 169 170 static const struct usb_temp_endpoint_desc bulk_in_ep = { 171 .pPacketSize = &bulk_mps, 172 #ifdef USB_HIP_IN_EP_0 173 .bEndpointAddress = USB_HIP_IN_EP_0, 174 #else 175 .bEndpointAddress = UE_DIR_IN, 176 #endif 177 .bmAttributes = UE_BULK, 178 }; 179 180 static const struct usb_temp_endpoint_desc bulk_out_ep = { 181 .pPacketSize = &bulk_mps, 182 #ifdef USB_HIP_OUT_EP_0 183 .bEndpointAddress = USB_HIP_OUT_EP_0, 184 #else 185 .bEndpointAddress = UE_DIR_OUT, 186 #endif 187 .bmAttributes = UE_BULK, 188 }; 189 190 static const struct usb_temp_endpoint_desc intr_in_ep = { 191 .pPacketSize = &intr_mps, 192 .bEndpointAddress = UE_DIR_IN, 193 .bmAttributes = UE_INTERRUPT, 194 }; 195 196 static const struct usb_temp_endpoint_desc *eth_intr_endpoints[] = { 197 &intr_in_ep, 198 NULL, 199 }; 200 201 static const struct usb_temp_interface_desc eth_control_interface = { 202 .ppEndpoints = eth_intr_endpoints, 203 .ppRawDesc = eth_control_if_desc, 204 .bInterfaceClass = UICLASS_CDC, 205 .bInterfaceSubClass = UISUBCLASS_ETHERNET_NETWORKING_CONTROL_MODEL, 206 .bInterfaceProtocol = UIPROTO_CDC_NONE, 207 .iInterface = MULTI_ETH_CONTROL_INDEX, 208 }; 209 210 static const struct usb_temp_endpoint_desc *eth_data_endpoints[] = { 211 &bulk_in_ep, 212 &bulk_out_ep, 213 NULL, 214 }; 215 216 static const struct usb_temp_interface_desc eth_data_null_interface = { 217 .ppEndpoints = NULL, /* no endpoints */ 218 .bInterfaceClass = UICLASS_CDC_DATA, 219 .bInterfaceSubClass = UISUBCLASS_DATA, 220 .bInterfaceProtocol = 0, 221 .iInterface = MULTI_ETH_DATA_INDEX, 222 }; 223 224 static const struct usb_temp_interface_desc eth_data_interface = { 225 .ppEndpoints = eth_data_endpoints, 226 .bInterfaceClass = UICLASS_CDC_DATA, 227 .bInterfaceSubClass = UISUBCLASS_DATA, 228 .bInterfaceProtocol = 0, 229 .iInterface = MULTI_ETH_DATA_INDEX, 230 .isAltInterface = 1, /* this is an alternate setting */ 231 }; 232 233 static const struct usb_temp_packet_size modem_bulk_mps = { 234 .mps[USB_SPEED_LOW] = 8, 235 .mps[USB_SPEED_FULL] = 64, 236 .mps[USB_SPEED_HIGH] = 512, 237 }; 238 239 static const struct usb_temp_packet_size modem_intr_mps = { 240 .mps[USB_SPEED_LOW] = 8, 241 .mps[USB_SPEED_FULL] = 8, 242 .mps[USB_SPEED_HIGH] = 8, 243 }; 244 245 static const struct usb_temp_interval modem_intr_interval = { 246 .bInterval[USB_SPEED_LOW] = 8, /* 8ms */ 247 .bInterval[USB_SPEED_FULL] = 8, /* 8ms */ 248 .bInterval[USB_SPEED_HIGH] = 7, /* 8ms */ 249 }; 250 251 static const struct usb_temp_endpoint_desc modem_ep_0 = { 252 .pPacketSize = &modem_intr_mps, 253 .pIntervals = &modem_intr_interval, 254 .bEndpointAddress = UE_DIR_IN, 255 .bmAttributes = UE_INTERRUPT, 256 }; 257 258 static const struct usb_temp_endpoint_desc modem_ep_1 = { 259 .pPacketSize = &modem_bulk_mps, 260 .bEndpointAddress = UE_DIR_OUT, 261 .bmAttributes = UE_BULK, 262 }; 263 264 static const struct usb_temp_endpoint_desc modem_ep_2 = { 265 .pPacketSize = &modem_bulk_mps, 266 .bEndpointAddress = UE_DIR_IN, 267 .bmAttributes = UE_BULK, 268 }; 269 270 static const struct usb_temp_endpoint_desc *modem_iface_0_ep[] = { 271 &modem_ep_0, 272 NULL, 273 }; 274 275 static const struct usb_temp_endpoint_desc *modem_iface_1_ep[] = { 276 &modem_ep_1, 277 &modem_ep_2, 278 NULL, 279 }; 280 281 static const uint8_t modem_raw_desc_0[] = { 282 0x05, 0x24, 0x00, 0x10, 0x01 283 }; 284 285 static const uint8_t modem_raw_desc_1[] = { 286 0x05, 0x24, 0x06, MODEM_IFACE_0, MODEM_IFACE_1 287 }; 288 289 static const uint8_t modem_raw_desc_2[] = { 290 0x05, 0x24, 0x01, 0x03, MODEM_IFACE_1 291 }; 292 293 static const uint8_t modem_raw_desc_3[] = { 294 0x04, 0x24, 0x02, 0x07 295 }; 296 297 static const void *modem_iface_0_desc[] = { 298 &modem_raw_desc_0, 299 &modem_raw_desc_1, 300 &modem_raw_desc_2, 301 &modem_raw_desc_3, 302 NULL, 303 }; 304 305 static const struct usb_temp_interface_desc modem_iface_0 = { 306 .ppRawDesc = modem_iface_0_desc, 307 .ppEndpoints = modem_iface_0_ep, 308 .bInterfaceClass = UICLASS_CDC, 309 .bInterfaceSubClass = UISUBCLASS_ABSTRACT_CONTROL_MODEL, 310 .bInterfaceProtocol = UIPROTO_CDC_NONE, 311 .iInterface = MULTI_MODEM_INDEX, 312 }; 313 314 static const struct usb_temp_interface_desc modem_iface_1 = { 315 .ppEndpoints = modem_iface_1_ep, 316 .bInterfaceClass = UICLASS_CDC_DATA, 317 .bInterfaceSubClass = UISUBCLASS_DATA, 318 .bInterfaceProtocol = 0, 319 .iInterface = MULTI_MODEM_INDEX, 320 }; 321 322 static const struct usb_temp_packet_size msc_bulk_mps = { 323 .mps[USB_SPEED_FULL] = 64, 324 .mps[USB_SPEED_HIGH] = 512, 325 }; 326 327 static const struct usb_temp_endpoint_desc msc_bulk_in_ep = { 328 .pPacketSize = &msc_bulk_mps, 329 #ifdef USB_HIP_IN_EP_0 330 .bEndpointAddress = USB_HIP_IN_EP_0, 331 #else 332 .bEndpointAddress = UE_DIR_IN, 333 #endif 334 .bmAttributes = UE_BULK, 335 }; 336 337 static const struct usb_temp_endpoint_desc msc_bulk_out_ep = { 338 .pPacketSize = &msc_bulk_mps, 339 #ifdef USB_HIP_OUT_EP_0 340 .bEndpointAddress = USB_HIP_OUT_EP_0, 341 #else 342 .bEndpointAddress = UE_DIR_OUT, 343 #endif 344 .bmAttributes = UE_BULK, 345 }; 346 347 static const struct usb_temp_endpoint_desc *msc_data_endpoints[] = { 348 &msc_bulk_in_ep, 349 &msc_bulk_out_ep, 350 NULL, 351 }; 352 353 static const struct usb_temp_interface_desc msc_data_interface = { 354 .ppEndpoints = msc_data_endpoints, 355 .bInterfaceClass = UICLASS_MASS, 356 .bInterfaceSubClass = UISUBCLASS_SCSI, 357 .bInterfaceProtocol = UIPROTO_MASS_BBB, 358 .iInterface = MULTI_STORAGE_INDEX, 359 }; 360 361 static const struct usb_temp_interface_desc *multi_interfaces[] = { 362 &modem_iface_0, 363 &modem_iface_1, 364 ð_control_interface, 365 ð_data_null_interface, 366 ð_data_interface, 367 &msc_data_interface, 368 NULL, 369 }; 370 371 static const struct usb_temp_config_desc multi_config_desc = { 372 .ppIfaceDesc = multi_interfaces, 373 .bmAttributes = 0, 374 .bMaxPower = 0, 375 .iConfiguration = MULTI_CONFIGURATION_INDEX, 376 }; 377 static const struct usb_temp_config_desc *multi_configs[] = { 378 &multi_config_desc, 379 NULL, 380 }; 381 382 struct usb_temp_device_desc usb_template_multi = { 383 .getStringDesc = &multi_get_string_desc, 384 .ppConfigDesc = multi_configs, 385 .idVendor = MULTI_DEFAULT_VENDOR_ID, 386 .idProduct = MULTI_DEFAULT_PRODUCT_ID, 387 .bcdDevice = 0x0100, 388 .bDeviceClass = UDCLASS_IN_INTERFACE, 389 .bDeviceSubClass = 0, 390 .bDeviceProtocol = 0, 391 .iManufacturer = MULTI_MANUFACTURER_INDEX, 392 .iProduct = MULTI_PRODUCT_INDEX, 393 .iSerialNumber = MULTI_SERIAL_NUMBER_INDEX, 394 }; 395 396 /*------------------------------------------------------------------------* 397 * multi_get_string_desc 398 * 399 * Return values: 400 * NULL: Failure. No such string. 401 * Else: Success. Pointer to string descriptor is returned. 402 *------------------------------------------------------------------------*/ 403 static const void * 404 multi_get_string_desc(uint16_t lang_id, uint8_t string_index) 405 { 406 static const void *ptr[MULTI_MAX_INDEX] = { 407 [MULTI_LANG_INDEX] = &usb_string_lang_en, 408 [MULTI_MODEM_INDEX] = &multi_modem, 409 [MULTI_ETH_MAC_INDEX] = &multi_eth_mac, 410 [MULTI_ETH_CONTROL_INDEX] = &multi_eth_control, 411 [MULTI_ETH_DATA_INDEX] = &multi_eth_data, 412 [MULTI_STORAGE_INDEX] = &multi_storage, 413 [MULTI_CONFIGURATION_INDEX] = &multi_configuration, 414 [MULTI_MANUFACTURER_INDEX] = &multi_manufacturer, 415 [MULTI_PRODUCT_INDEX] = &multi_product, 416 [MULTI_SERIAL_NUMBER_INDEX] = &multi_serial_number, 417 }; 418 419 if (string_index == 0) { 420 return (&usb_string_lang_en); 421 } 422 if (lang_id != 0x0409) { 423 return (NULL); 424 } 425 if (string_index < MULTI_MAX_INDEX) { 426 return (ptr[string_index]); 427 } 428 return (NULL); 429 } 430 431 static void 432 multi_init(void *arg __unused) 433 { 434 struct sysctl_oid *parent; 435 char parent_name[3]; 436 437 usb_make_str_desc(&multi_modem, sizeof(multi_modem), 438 MULTI_DEFAULT_MODEM); 439 usb_make_str_desc(&multi_eth_mac, sizeof(multi_eth_mac), 440 MULTI_DEFAULT_ETH_MAC); 441 usb_make_str_desc(&multi_eth_control, sizeof(multi_eth_control), 442 MULTI_DEFAULT_ETH_CONTROL); 443 usb_make_str_desc(&multi_eth_data, sizeof(multi_eth_data), 444 MULTI_DEFAULT_ETH_DATA); 445 usb_make_str_desc(&multi_storage, sizeof(multi_storage), 446 MULTI_DEFAULT_STORAGE); 447 usb_make_str_desc(&multi_configuration, sizeof(multi_configuration), 448 MULTI_DEFAULT_CONFIGURATION); 449 usb_make_str_desc(&multi_manufacturer, sizeof(multi_manufacturer), 450 MULTI_DEFAULT_MANUFACTURER); 451 usb_make_str_desc(&multi_product, sizeof(multi_product), 452 MULTI_DEFAULT_PRODUCT); 453 usb_make_str_desc(&multi_serial_number, sizeof(multi_serial_number), 454 MULTI_DEFAULT_SERIAL_NUMBER); 455 456 snprintf(parent_name, sizeof(parent_name), "%d", USB_TEMP_MULTI); 457 sysctl_ctx_init(&multi_ctx_list); 458 459 parent = SYSCTL_ADD_NODE(&multi_ctx_list, 460 SYSCTL_STATIC_CHILDREN(_hw_usb_templates), OID_AUTO, 461 parent_name, CTLFLAG_RW, 462 0, "USB Multifunction device side template"); 463 SYSCTL_ADD_U16(&multi_ctx_list, SYSCTL_CHILDREN(parent), OID_AUTO, 464 "vendor_id", CTLFLAG_RWTUN, 465 &usb_template_multi.idVendor, 1, "Vendor identifier"); 466 SYSCTL_ADD_U16(&multi_ctx_list, SYSCTL_CHILDREN(parent), OID_AUTO, 467 "product_id", CTLFLAG_RWTUN, 468 &usb_template_multi.idProduct, 1, "Product identifier"); 469 SYSCTL_ADD_PROC(&multi_ctx_list, SYSCTL_CHILDREN(parent), OID_AUTO, 470 "eth_mac", CTLTYPE_STRING | CTLFLAG_RWTUN | CTLFLAG_MPSAFE, 471 &multi_eth_mac, sizeof(multi_eth_mac), usb_temp_sysctl, 472 "A", "Ethernet MAC address string"); 473 #if 0 474 SYSCTL_ADD_PROC(&multi_ctx_list, SYSCTL_CHILDREN(parent), OID_AUTO, 475 "modem", CTLTYPE_STRING | CTLFLAG_RWTUN | CTLFLAG_MPSAFE, 476 &multi_modem, sizeof(multi_modem), usb_temp_sysctl, 477 "A", "Modem interface string"); 478 SYSCTL_ADD_PROC(&multi_ctx_list, SYSCTL_CHILDREN(parent), OID_AUTO, 479 "eth_control", CTLTYPE_STRING | CTLFLAG_RWTUN | CTLFLAG_MPSAFE, 480 &multi_eth_control, sizeof(multi_eth_data), usb_temp_sysctl, 481 "A", "Ethernet control interface string"); 482 SYSCTL_ADD_PROC(&multi_ctx_list, SYSCTL_CHILDREN(parent), OID_AUTO, 483 "eth_data", CTLTYPE_STRING | CTLFLAG_RWTUN | CTLFLAG_MPSAFE, 484 &multi_eth_data, sizeof(multi_eth_data), usb_temp_sysctl, 485 "A", "Ethernet data interface string"); 486 SYSCTL_ADD_PROC(&multi_ctx_list, SYSCTL_CHILDREN(parent), OID_AUTO, 487 "interface", CTLTYPE_STRING | CTLFLAG_RWTUN | CTLFLAG_MPSAFE, 488 &multi_storage, sizeof(multi_storage), usb_temp_sysctl, 489 "A", "Storage interface string"); 490 SYSCTL_ADD_PROC(&multi_ctx_list, SYSCTL_CHILDREN(parent), OID_AUTO, 491 "configuration", CTLTYPE_STRING | CTLFLAG_RWTUN | CTLFLAG_MPSAFE, 492 &multi_configuration, sizeof(multi_configuration), usb_temp_sysctl, 493 "A", "Configuration string"); 494 #endif 495 SYSCTL_ADD_PROC(&multi_ctx_list, SYSCTL_CHILDREN(parent), OID_AUTO, 496 "manufacturer", CTLTYPE_STRING | CTLFLAG_RWTUN | CTLFLAG_MPSAFE, 497 &multi_manufacturer, sizeof(multi_manufacturer), usb_temp_sysctl, 498 "A", "Manufacturer string"); 499 SYSCTL_ADD_PROC(&multi_ctx_list, SYSCTL_CHILDREN(parent), OID_AUTO, 500 "product", CTLTYPE_STRING | CTLFLAG_RWTUN | CTLFLAG_MPSAFE, 501 &multi_product, sizeof(multi_product), usb_temp_sysctl, 502 "A", "Product string"); 503 SYSCTL_ADD_PROC(&multi_ctx_list, SYSCTL_CHILDREN(parent), OID_AUTO, 504 "serial_number", CTLTYPE_STRING | CTLFLAG_RWTUN | CTLFLAG_MPSAFE, 505 &multi_serial_number, sizeof(multi_serial_number), usb_temp_sysctl, 506 "A", "Serial number string"); 507 } 508 509 static void 510 multi_uninit(void *arg __unused) 511 { 512 513 sysctl_ctx_free(&multi_ctx_list); 514 } 515 516 SYSINIT(multi_init, SI_SUB_LOCK, SI_ORDER_FIRST, multi_init, NULL); 517 SYSUNINIT(multi_uninit, SI_SUB_LOCK, SI_ORDER_FIRST, multi_uninit, NULL); 518