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