Harald Welte | a67be5f | 2020-09-03 10:04:36 +0200 | [diff] [blame^] | 1 | /* USB Gadget simulating a USB hub over FunctionFS |
| 2 | * - this was used to play with limitations of the Linux kernel hub driver |
| 3 | * |
| 4 | * (C) 2019 by Harald Welte <laforge@gnumonks.org> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA |
| 19 | */ |
Harald Welte | a7c1eb0 | 2019-09-12 15:16:43 +0200 | [diff] [blame] | 20 | |
| 21 | #include <errno.h> |
| 22 | #include <stdint.h> |
| 23 | #include <endian.h> |
| 24 | #include <signal.h> |
| 25 | #include <sys/types.h> |
| 26 | #include <linux/usb/functionfs.h> |
| 27 | #include <linux/usb/ch11.h> |
| 28 | |
| 29 | #if __BYTE_ORDER == __LITTLE_ENDIAN |
| 30 | #define cpu_to_le16(x) (x) |
| 31 | #define cpu_to_le32(x) (x) |
| 32 | #else |
| 33 | #define cpu_to_le16(x) ((((x) >> 8) & 0xffu) | (((x) & 0xffu) << 8)) |
| 34 | #define cpu_to_le32(x) \ |
| 35 | ((((x) & 0xff000000u) >> 24) | (((x) & 0x00ff0000u) >> 8) | \ |
| 36 | (((x) & 0x0000ff00u) << 8) | (((x) & 0x000000ffu) << 24)) |
| 37 | #endif |
| 38 | |
| 39 | #define le32_to_cpu(x) le32toh(x) |
| 40 | #define le16_to_cpu(x) le16toh(x) |
| 41 | |
| 42 | enum { |
| 43 | DUSB, |
| 44 | }; |
| 45 | |
| 46 | /*********************************************************************** |
| 47 | * Actual USB Descriptors |
| 48 | ***********************************************************************/ |
| 49 | |
| 50 | static const struct { |
| 51 | struct usb_functionfs_descs_head_v2 header; |
| 52 | __le32 fs_count; |
| 53 | struct { |
| 54 | struct usb_interface_descriptor intf; |
| 55 | struct usb_endpoint_descriptor_no_audio ep_int; |
| 56 | } __attribute__ ((packed)) fs_descs; |
| 57 | } __attribute__ ((packed)) descriptors = { |
| 58 | .header = { |
| 59 | .magic = cpu_to_le32(FUNCTIONFS_DESCRIPTORS_MAGIC_V2), |
| 60 | .flags = cpu_to_le32(FUNCTIONFS_HAS_FS_DESC | FUNCTIONFS_ALL_CTRL_RECIP), |
| 61 | .length = cpu_to_le32(sizeof(descriptors)), |
| 62 | }, |
| 63 | .fs_count = cpu_to_le32(2), |
| 64 | .fs_descs = { |
| 65 | .intf = { |
| 66 | .bLength = sizeof(descriptors.fs_descs.intf), |
| 67 | .bDescriptorType = USB_DT_INTERFACE, |
| 68 | .bNumEndpoints = 1, |
| 69 | .bInterfaceClass = USB_CLASS_HUB, |
| 70 | .iInterface = 1, |
| 71 | }, |
| 72 | .ep_int = { |
| 73 | .bLength = sizeof(descriptors.fs_descs.ep_int), |
| 74 | .bDescriptorType = USB_DT_ENDPOINT, |
| 75 | .bEndpointAddress = 1 | USB_DIR_IN, |
| 76 | .bmAttributes = USB_ENDPOINT_XFER_INT, |
| 77 | .wMaxPacketSize = 64, |
| 78 | .bInterval = 12, |
| 79 | }, |
| 80 | }, |
| 81 | }; |
| 82 | |
| 83 | #define STR_INTERFACE_ "Osmocom USB Hub" |
| 84 | |
| 85 | static const struct { |
| 86 | struct usb_functionfs_strings_head header; |
| 87 | struct { |
| 88 | __le16 code; |
| 89 | const char str1[sizeof(STR_INTERFACE_)]; |
| 90 | } __attribute__((packed)) lang0; |
| 91 | } __attribute__((packed)) strings = { |
| 92 | .header = { |
| 93 | .magic = cpu_to_le32(FUNCTIONFS_STRINGS_MAGIC), |
| 94 | .length = cpu_to_le32(sizeof(strings)), |
| 95 | .str_count = cpu_to_le32(1), |
| 96 | .lang_count = cpu_to_le32(1), |
| 97 | }, |
| 98 | .lang0 = { |
| 99 | cpu_to_le16(0x0409), /* en-us */ |
| 100 | STR_INTERFACE_, |
| 101 | }, |
| 102 | }; |
| 103 | |
| 104 | |
| 105 | struct usb2_hub_desc_header { |
| 106 | __u8 bDescLength; |
| 107 | __u8 bDescriptorType; |
| 108 | __u8 bNbrPorts; |
| 109 | __le16 wHubCharacteristics; |
| 110 | __u8 bPwrOn2PwrGood; |
| 111 | __u8 bHubContrCurrent; |
| 112 | __u8 data[0]; |
| 113 | }; |
| 114 | |
| 115 | #define NUM_PORTS 31 |
| 116 | #define HDESC_ARR_BYTES ((NUM_PORTS + 1 + 7) / 8) |
| 117 | static const struct { |
| 118 | struct usb2_hub_desc_header hdr; |
| 119 | uint8_t DeviceRemovable[HDESC_ARR_BYTES]; |
| 120 | uint8_t PortPwrCtrlMask[HDESC_ARR_BYTES]; |
| 121 | } __attribute__ ((packed)) hub_desc = { |
| 122 | .hdr = { |
| 123 | .bDescLength = sizeof(hub_desc), |
| 124 | .bDescriptorType = USB_DT_HUB, |
| 125 | .bNbrPorts = NUM_PORTS, |
| 126 | .wHubCharacteristics = cpu_to_le16(0x0001), |
| 127 | .bPwrOn2PwrGood = 100, |
| 128 | .bHubContrCurrent = 0, |
| 129 | }, |
| 130 | }; |
| 131 | |
| 132 | |
| 133 | /*********************************************************************** |
| 134 | * USB FunctionFS interface |
| 135 | ***********************************************************************/ |
| 136 | |
| 137 | #include <stdlib.h> |
| 138 | #include <stdio.h> |
| 139 | #include <unistd.h> |
| 140 | #include <string.h> |
| 141 | #include <assert.h> |
| 142 | #include <fcntl.h> |
| 143 | #include <sys/stat.h> |
| 144 | #include <osmocom/core/select.h> |
| 145 | #include <osmocom/core/utils.h> |
| 146 | #include <osmocom/core/msgb.h> |
| 147 | #include <osmocom/core/utils.h> |
| 148 | #include <osmocom/core/application.h> |
| 149 | #include <osmocom/core/logging.h> |
| 150 | |
| 151 | #ifndef FUNCTIONFS_SUPPORTS_POLL |
| 152 | #include <libaio.h> |
| 153 | struct aio_help { |
| 154 | struct msgb *msg; |
| 155 | struct iocb *iocb; |
| 156 | }; |
| 157 | #endif |
| 158 | |
| 159 | /* usb function handle */ |
| 160 | struct ufunc_handle { |
| 161 | struct osmo_fd ep0; |
| 162 | struct osmo_fd ep_int; |
| 163 | struct llist_head ep_int_queue; |
| 164 | #ifndef FUNCTIONFS_SUPPORTS_POLL |
| 165 | struct osmo_fd aio_evfd; |
| 166 | io_context_t aio_ctx; |
| 167 | struct aio_help aio_int; |
| 168 | #endif |
| 169 | }; |
| 170 | |
| 171 | static int ep_int_cb(struct osmo_fd *ofd, unsigned int what) |
| 172 | { |
| 173 | LOGP(DUSB, LOGL_DEBUG, "%s\n", __func__); |
| 174 | return 0; |
| 175 | } |
| 176 | |
| 177 | const struct value_string ffs_evt_type_names[] = { |
| 178 | { FUNCTIONFS_BIND, "BIND" }, |
| 179 | { FUNCTIONFS_UNBIND, "UNBIND" }, |
| 180 | { FUNCTIONFS_ENABLE, "ENABLE" }, |
| 181 | { FUNCTIONFS_DISABLE, "DISABLE" }, |
| 182 | { FUNCTIONFS_SETUP, "SETUP" }, |
| 183 | { FUNCTIONFS_SUSPEND, "SUSPEND" }, |
| 184 | { FUNCTIONFS_RESUME, "RESUME" }, |
| 185 | { 0, NULL } |
| 186 | }; |
| 187 | |
| 188 | /* local, stand-alone definition of a USB control request */ |
| 189 | struct _usb_ctrl_req { |
| 190 | uint8_t bRequestType; |
| 191 | uint8_t bRequest; |
| 192 | uint16_t wValue; |
| 193 | uint16_t wIndex; |
| 194 | uint16_t wLength; |
| 195 | } __attribute__ ((packed));; |
| 196 | |
| 197 | /* class requests from the USB 2.0 hub spec, table 11-15 */ |
| 198 | #define HUB_CLASS_REQ(dir, type, request) ((((dir) | (type)) << 8) | (request)) |
| 199 | /* GetBusState and SetHubDescriptor are optional, omitted */ |
| 200 | #define ClearHubFeature HUB_CLASS_REQ(USB_DIR_OUT, USB_RT_HUB, USB_REQ_CLEAR_FEATURE) |
| 201 | #define ClearPortFeature HUB_CLASS_REQ(USB_DIR_OUT, USB_RT_PORT, USB_REQ_CLEAR_FEATURE) |
| 202 | #define GetHubDescriptor HUB_CLASS_REQ(USB_DIR_IN, USB_RT_HUB, USB_REQ_GET_DESCRIPTOR) |
| 203 | #define GetHubStatus HUB_CLASS_REQ(USB_DIR_IN, USB_RT_HUB, USB_REQ_GET_STATUS) |
| 204 | #define GetPortStatus HUB_CLASS_REQ(USB_DIR_IN, USB_RT_PORT, USB_REQ_GET_STATUS) |
| 205 | #define SetHubFeature HUB_CLASS_REQ(USB_DIR_OUT, USB_RT_HUB, USB_REQ_SET_FEATURE) |
| 206 | #define SetPortFeature HUB_CLASS_REQ(USB_DIR_OUT, USB_RT_PORT, USB_REQ_SET_FEATURE) |
| 207 | |
| 208 | static const struct value_string hub_class_spec_req_vals[] = { |
| 209 | OSMO_VALUE_STRING(USB_REQ_CLEAR_FEATURE), |
| 210 | OSMO_VALUE_STRING(USB_REQ_GET_DESCRIPTOR), |
| 211 | OSMO_VALUE_STRING(USB_REQ_GET_STATUS), |
| 212 | OSMO_VALUE_STRING(USB_REQ_SET_FEATURE), |
| 213 | { 0, NULL } |
| 214 | }; |
| 215 | |
| 216 | #define CCID_CTRL_RET_INVALID -1 |
| 217 | #define CCID_CTRL_RET_UNKNOWN -2 |
| 218 | #define CCID_CTRL_RET_OK 0 |
| 219 | |
| 220 | /*! Handle [class specific] CTRL request. We assume the caller has already verified that the |
| 221 | * request was made to the correct interface as well as it is a class-specific request. |
| 222 | * \param[in] ci CCID Instance for which CTRL request was received |
| 223 | * \param[in] ctrl_req buffer holding the 8 bytes CTRL transfer header |
| 224 | * \param[out] data_in data to be returned to the host in the IN transaction (if any) |
| 225 | * \returns CCID_CTRL_RET_OK, CCID_CTRL_RET_INVALID or CCID_CTRL_RET_UNKNOWN |
| 226 | */ |
| 227 | int hub_handle_ctrl(void *ci, const uint8_t *ctrl_req, const uint8_t **data_in) |
| 228 | { |
| 229 | const struct _usb_ctrl_req *req = (const struct _usb_ctrl_req *) ctrl_req; |
| 230 | static uint16_t status[2]; |
| 231 | int rc; |
| 232 | |
| 233 | LOGP(DUSB, LOGL_NOTICE, "CTRL bmReqT=0x%02X bRequest=%s, wValue=0x%04X, wIndex=0x%04X, wLength=%d\n", |
| 234 | req->bRequestType, get_value_string(hub_class_spec_req_vals, req->bRequest), |
| 235 | req->wValue, req->wIndex, req->wLength); |
| 236 | |
| 237 | switch (req->bRequestType & 0x7f) { |
| 238 | case USB_RT_HUB: |
| 239 | switch (req->bRequest) { |
| 240 | case USB_REQ_GET_DESCRIPTOR: |
| 241 | if (req->wIndex != 0) { |
| 242 | LOGP(DUSB, LOGL_ERROR, "GET_DESC wIndex invalid\n"); |
| 243 | return CCID_CTRL_RET_INVALID; |
| 244 | } |
| 245 | if (0) // ctrl_req->wValue != FIXME |
| 246 | return CCID_CTRL_RET_INVALID; |
| 247 | *data_in = (const uint8_t *) &hub_desc; |
| 248 | return sizeof(hub_desc); |
| 249 | case USB_REQ_CLEAR_FEATURE: |
| 250 | switch (req->wValue) { |
| 251 | case C_HUB_LOCAL_POWER: |
| 252 | case C_HUB_OVER_CURRENT: |
| 253 | return CCID_CTRL_RET_OK; |
| 254 | } |
| 255 | break; |
| 256 | case USB_REQ_GET_STATUS: |
| 257 | status[0] = cpu_to_le16(HUB_STATUS_LOCAL_POWER); |
| 258 | status[1] = cpu_to_le16(0); |
| 259 | *data_in = (const uint8_t *) status; |
| 260 | return sizeof(status); |
| 261 | case USB_REQ_SET_FEATURE: |
| 262 | if (req->wValue > 1) |
| 263 | return CCID_CTRL_RET_INVALID; |
| 264 | return CCID_CTRL_RET_OK; |
| 265 | } |
| 266 | break; |
| 267 | case USB_RT_PORT: |
| 268 | switch (req->bRequest) { |
| 269 | case USB_REQ_CLEAR_FEATURE: |
| 270 | switch (req->wValue) { |
| 271 | case USB_PORT_FEAT_CONNECTION: |
| 272 | case USB_PORT_FEAT_ENABLE: |
| 273 | case USB_PORT_FEAT_SUSPEND: |
| 274 | case USB_PORT_FEAT_OVER_CURRENT: |
| 275 | case USB_PORT_FEAT_RESET: |
| 276 | case USB_PORT_FEAT_L1: |
| 277 | case USB_PORT_FEAT_POWER: |
| 278 | case USB_PORT_FEAT_LOWSPEED: |
| 279 | case USB_PORT_FEAT_C_CONNECTION: |
| 280 | case USB_PORT_FEAT_C_ENABLE: |
| 281 | case USB_PORT_FEAT_C_SUSPEND: |
| 282 | case USB_PORT_FEAT_C_OVER_CURRENT: |
| 283 | case USB_PORT_FEAT_C_RESET: |
| 284 | case USB_PORT_FEAT_TEST: |
| 285 | case USB_PORT_FEAT_C_PORT_L1: |
| 286 | return CCID_CTRL_RET_OK; |
| 287 | } |
| 288 | break; |
| 289 | case USB_REQ_GET_STATUS: |
| 290 | status[0] = cpu_to_le16(0); |
| 291 | status[1] = cpu_to_le16(0); |
| 292 | *data_in = (const uint8_t *) status; |
| 293 | return sizeof(status); |
| 294 | case USB_REQ_SET_FEATURE: |
| 295 | //selector = wIndex >> 8 |
| 296 | //port = wIndex & 0xff |
| 297 | return CCID_CTRL_RET_OK; |
| 298 | } |
| 299 | } |
| 300 | return CCID_CTRL_RET_UNKNOWN; |
| 301 | } |
| 302 | |
| 303 | static void handle_setup(int fd, const struct usb_ctrlrequest *setup) |
| 304 | { |
| 305 | const uint8_t *data_in = NULL; |
| 306 | int rc; |
| 307 | |
| 308 | LOGP(DUSB, LOGL_NOTICE, "EP0 SETUP bRequestType=0x%02x, bRequest=0x%02x wValue=0x%04x, " |
| 309 | "wIndex=0x%04x, wLength=%u\n", setup->bRequestType, setup->bRequest, |
| 310 | le16_to_cpu(setup->wValue), le16_to_cpu(setup->wIndex), le16_to_cpu(setup->wLength)); |
| 311 | |
| 312 | rc = hub_handle_ctrl(NULL, (const uint8_t *) setup, &data_in); |
| 313 | switch (rc) { |
| 314 | case CCID_CTRL_RET_INVALID: |
| 315 | if (setup->bRequestType & USB_DIR_IN) |
| 316 | read(fd, NULL, 0); /* cause stall */ |
| 317 | else |
| 318 | write(fd, NULL, 0); /* cause stall */ |
| 319 | break; |
| 320 | case CCID_CTRL_RET_UNKNOWN: |
| 321 | /* FIXME: is this correct behavior? */ |
| 322 | if (setup->bRequestType & USB_DIR_IN) |
| 323 | write(fd, NULL, 0); /* send ZLP */ |
| 324 | else |
| 325 | read(fd, NULL, 0); |
| 326 | break; |
| 327 | default: |
| 328 | if (setup->bRequestType & USB_DIR_IN) { |
| 329 | uint16_t len = rc; |
| 330 | if (setup->wLength < len) |
| 331 | len = setup->wLength; |
| 332 | LOGP(DUSB, LOGL_NOTICE, "Writing %u: %s\n", len, osmo_hexdump_nospc(data_in, len)); |
| 333 | write(fd, data_in, le16_to_cpu(len)); |
| 334 | } else |
| 335 | read(fd, NULL, 0); /* FIXME: control OUT? */ |
| 336 | break; |
| 337 | } |
| 338 | } |
| 339 | |
| 340 | static int ep_0_cb(struct osmo_fd *ofd, unsigned int what) |
| 341 | { |
| 342 | struct ufunc_handle *uh = (struct ufunc_handle *) ofd->data; |
| 343 | int rc; |
| 344 | |
| 345 | if (what & BSC_FD_READ) { |
| 346 | struct usb_functionfs_event evt; |
| 347 | rc = read(ofd->fd, (uint8_t *)&evt, sizeof(evt)); |
| 348 | if (rc < sizeof(evt)) |
| 349 | return -23; |
| 350 | LOGP(DUSB, LOGL_NOTICE, "EP0 %s\n", get_value_string(ffs_evt_type_names, evt.type)); |
| 351 | switch (evt.type) { |
| 352 | case FUNCTIONFS_ENABLE: |
| 353 | //aio_refill_out(uh); |
| 354 | break; |
| 355 | case FUNCTIONFS_SETUP: |
| 356 | handle_setup(ofd->fd, &evt.u.setup); |
| 357 | break; |
| 358 | } |
| 359 | |
| 360 | } |
| 361 | return 0; |
| 362 | } |
| 363 | |
| 364 | #ifndef FUNCTIONFS_SUPPORTS_POLL |
| 365 | |
| 366 | /* dequeue the next msgb from ep_int_queue and set up AIO for it */ |
| 367 | static void dequeue_aio_write_int(struct ufunc_handle *uh) |
| 368 | { |
| 369 | struct aio_help *ah = &uh->aio_int; |
| 370 | struct msgb *d; |
| 371 | int rc; |
| 372 | |
| 373 | if (ah->msg) |
| 374 | return; |
| 375 | |
| 376 | d = msgb_dequeue(&uh->ep_int_queue); |
| 377 | if (!d) |
| 378 | return; |
| 379 | |
| 380 | OSMO_ASSERT(ah->iocb); |
| 381 | ah->msg = d; |
| 382 | io_prep_pwrite(ah->iocb, uh->ep_int.fd, msgb_data(d), msgb_length(d), 0); |
| 383 | io_set_eventfd(ah->iocb, uh->aio_evfd.fd); |
| 384 | rc = io_submit(uh->aio_ctx, 1, &ah->iocb); |
| 385 | OSMO_ASSERT(rc >= 0); |
| 386 | } |
| 387 | |
| 388 | static int evfd_cb(struct osmo_fd *ofd, unsigned int what) |
| 389 | { |
| 390 | struct ufunc_handle *uh = (struct ufunc_handle *) ofd->data; |
| 391 | struct io_event evt[1]; |
| 392 | struct msgb *msg; |
| 393 | uint64_t ev_cnt; |
| 394 | int i, rc; |
| 395 | |
| 396 | rc = read(ofd->fd, &ev_cnt, sizeof(ev_cnt)); |
| 397 | assert(rc == sizeof(ev_cnt)); |
| 398 | |
| 399 | rc = io_getevents(uh->aio_ctx, 1, 1, evt, NULL); |
| 400 | if (rc <= 0) { |
| 401 | LOGP(DUSB, LOGL_ERROR, "error in io_getevents(): %d\n", rc); |
| 402 | return rc; |
| 403 | } |
| 404 | |
| 405 | for (i = 0; i < rc; i++) { |
| 406 | int fd = evt[i].obj->aio_fildes; |
| 407 | if (fd == uh->ep_int.fd) { |
| 408 | /* interrupt endpoint AIO has completed. This means the IRQ transfer |
| 409 | * which we generated has reached the host */ |
| 410 | LOGP(DUSB, LOGL_DEBUG, "IRQ AIO completed, free()ing msgb\n"); |
| 411 | msgb_free(uh->aio_int.msg); |
| 412 | uh->aio_int.msg = NULL; |
| 413 | dequeue_aio_write_int(uh); |
| 414 | } |
| 415 | } |
| 416 | return 0; |
| 417 | } |
| 418 | #endif |
| 419 | |
| 420 | |
| 421 | static int ep0_init(struct ufunc_handle *uh) |
| 422 | { |
| 423 | int rc; |
| 424 | |
| 425 | /* open control endpoint and write descriptors to it */ |
| 426 | rc = open("ep0", O_RDWR); |
| 427 | assert(rc >= 0); |
| 428 | osmo_fd_setup(&uh->ep0, rc, BSC_FD_READ, &ep_0_cb, uh, 0); |
| 429 | osmo_fd_register(&uh->ep0); |
| 430 | rc = write(uh->ep0.fd, &descriptors, sizeof(descriptors)); |
| 431 | if (rc != sizeof(descriptors)) { |
| 432 | LOGP(DUSB, LOGL_ERROR, "Cannot write descriptors: %s\n", strerror(errno)); |
| 433 | return -1; |
| 434 | } |
| 435 | rc = write(uh->ep0.fd, &strings, sizeof(strings)); |
| 436 | if (rc != sizeof(strings)) { |
| 437 | LOGP(DUSB, LOGL_ERROR, "Cannot write strings: %s\n", strerror(errno)); |
| 438 | return -1; |
| 439 | } |
| 440 | |
| 441 | /* open other endpoint file descriptors */ |
| 442 | INIT_LLIST_HEAD(&uh->ep_int_queue); |
| 443 | rc = open("ep1", O_RDWR); |
| 444 | assert(rc >= 0); |
| 445 | osmo_fd_setup(&uh->ep_int, rc, 0, &ep_int_cb, uh, 1); |
| 446 | #ifdef FUNCTIONFS_SUPPORTS_POLL |
| 447 | osmo_fd_register(&uh->ep_int); |
| 448 | #endif |
| 449 | |
| 450 | #ifndef FUNCTIONFS_SUPPORTS_POLL |
| 451 | #include <sys/eventfd.h> |
| 452 | /* for some absolutely weird reason, gadgetfs+functionfs don't support |
| 453 | * the standard methods of non-blocking I/o (select/poll). We need to |
| 454 | * work around using Linux AIO, which is not to be confused with POSIX AIO! */ |
| 455 | |
| 456 | memset(&uh->aio_ctx, 0, sizeof(uh->aio_ctx)); |
| 457 | rc = io_setup(1, &uh->aio_ctx); |
| 458 | OSMO_ASSERT(rc >= 0); |
| 459 | |
| 460 | /* create an eventfd, which will be marked readable once some AIO completes */ |
| 461 | rc = eventfd(0, 0); |
| 462 | OSMO_ASSERT(rc >= 0); |
| 463 | osmo_fd_setup(&uh->aio_evfd, rc, BSC_FD_READ, &evfd_cb, uh, 0); |
| 464 | osmo_fd_register(&uh->aio_evfd); |
| 465 | |
| 466 | uh->aio_int.iocb = malloc(sizeof(struct iocb)); |
| 467 | #endif |
| 468 | |
| 469 | return 0; |
| 470 | } |
| 471 | |
| 472 | static const struct log_info_cat log_info_cat[] = { |
| 473 | [DUSB] = { |
| 474 | .name = "USB", |
| 475 | .description = "USB Transport", |
| 476 | .enabled = 1, |
| 477 | .loglevel = LOGL_NOTICE, |
| 478 | }, |
| 479 | }; |
| 480 | |
| 481 | static const struct log_info log_info = { |
| 482 | .cat = log_info_cat, |
| 483 | .num_cat = ARRAY_SIZE(log_info_cat), |
| 484 | }; |
| 485 | |
Eric Wild | dd2e82e | 2019-12-02 14:11:23 +0100 | [diff] [blame] | 486 | static void *g_tall_ctx; |
Harald Welte | a7c1eb0 | 2019-09-12 15:16:43 +0200 | [diff] [blame] | 487 | |
| 488 | static void signal_handler(int signal) |
| 489 | { |
| 490 | switch (signal) { |
| 491 | case SIGUSR1: |
Eric Wild | dd2e82e | 2019-12-02 14:11:23 +0100 | [diff] [blame] | 492 | talloc_report_full(g_tall_ctx, stderr); |
Harald Welte | a7c1eb0 | 2019-09-12 15:16:43 +0200 | [diff] [blame] | 493 | break; |
| 494 | } |
| 495 | } |
| 496 | |
| 497 | |
| 498 | int main(int argc, char **argv) |
| 499 | { |
| 500 | struct ufunc_handle ufh = (struct ufunc_handle) { 0, }; |
| 501 | int rc; |
| 502 | |
Eric Wild | dd2e82e | 2019-12-02 14:11:23 +0100 | [diff] [blame] | 503 | g_tall_ctx = talloc_named_const(NULL, 0, "hub_main_functionfs"); |
| 504 | msgb_talloc_ctx_init(g_tall_ctx, 0); |
| 505 | osmo_init_logging2(g_tall_ctx, &log_info); |
Harald Welte | a7c1eb0 | 2019-09-12 15:16:43 +0200 | [diff] [blame] | 506 | |
| 507 | signal(SIGUSR1, &signal_handler); |
| 508 | |
| 509 | if (argc < 2) { |
| 510 | fprintf(stderr, "You have to specify the mount-path of the functionfs\n"); |
| 511 | exit(2); |
| 512 | } |
| 513 | |
| 514 | chdir(argv[1]); |
| 515 | rc = ep0_init(&ufh); |
| 516 | if (rc < 0) { |
| 517 | fprintf(stderr, "Error %d\n", rc); |
| 518 | exit(1); |
| 519 | } |
| 520 | |
| 521 | while (1) { |
| 522 | osmo_select_main(0); |
| 523 | } |
| 524 | } |