kernel/tools/usb/usbip/libsrc/usbip_common.c

   1 /*
   2  * Copyright (C) 2005-2007 Takahiro Hirofuchi
   3  */
   4
   5 #include <libudev.h>
   6 #include "usbip_common.h"
   7 #include "names.h"
   8
   9 #undef  PROGNAME
  10 #define PROGNAME "libusbip"
  11
  12 int usbip_use_syslog;
  13 int usbip_use_stderr;
  14 int usbip_use_debug;
  15
  16 extern struct udev *udev_context;
  17
  18 struct speed_string {
  19         int num;
  20         char *speed;
  21         char *desc;
  22 };
  23
  24 static const struct speed_string speed_strings[] = {
  25         { USB_SPEED_UNKNOWN, "unknown", "Unknown Speed"},
  26         { USB_SPEED_LOW,  "1.5", "Low Speed(1.5Mbps)"  },
  27         { USB_SPEED_FULL, "12",  "Full Speed(12Mbps)" },
  28         { USB_SPEED_HIGH, "480", "High Speed(480Mbps)" },
  29         { USB_SPEED_WIRELESS, "53.3-480", "Wireless"},
  30         { USB_SPEED_SUPER, "5000", "Super Speed(5000Mbps)" },
  31         { 0, NULL, NULL }
  32 };
  33
  34 struct portst_string {
  35         int num;
  36         char *desc;
  37 };
  38
  39 static struct portst_string portst_strings[] = {
  40         { SDEV_ST_AVAILABLE,    "Device Available" },
  41         { SDEV_ST_USED,         "Device in Use" },
  42         { SDEV_ST_ERROR,        "Device Error"},
  43         { VDEV_ST_NULL,         "Port Available"},
  44         { VDEV_ST_NOTASSIGNED,  "Port Initializing"},
  45         { VDEV_ST_USED,         "Port in Use"},
  46         { VDEV_ST_ERROR,        "Port Error"},
  47         { 0, NULL}
  48 };
  49
  50 const char *usbip_status_string(int32_t status)
  51 {
  52         for (int i = 0; portst_strings[i].desc != NULL; i++)
  53                 if (portst_strings[i].num == status)
  54                         return portst_strings[i].desc;
  55
  56         return "Unknown Status";
  57 }
  58
  59 const char *usbip_speed_string(int num)
  60 {
  61         for (int i = 0; speed_strings[i].speed != NULL; i++)
  62                 if (speed_strings[i].num == num)
  63                         return speed_strings[i].desc;
  64
  65         return "Unknown Speed";
  66 }
  67
  68
  69 #define DBG_UDEV_INTEGER(name)\
  70         dbg("%-20s = %x", to_string(name), (int) udev->name)
  71
  72 #define DBG_UINF_INTEGER(name)\
  73         dbg("%-20s = %x", to_string(name), (int) uinf->name)
  74
  75 void dump_usb_interface(struct usbip_usb_interface *uinf)
  76 {
  77         char buff[100];
  78
  79         usbip_names_get_class(buff, sizeof(buff),
  80                         uinf->bInterfaceClass,
  81                         uinf->bInterfaceSubClass,
  82                         uinf->bInterfaceProtocol);
  83         dbg("%-20s = %s", "Interface(C/SC/P)", buff);
  84 }
  85
  86 void dump_usb_device(struct usbip_usb_device *udev)
  87 {
  88         char buff[100];
  89
  90         dbg("%-20s = %s", "path",  udev->path);
  91         dbg("%-20s = %s", "busid", udev->busid);
  92
  93         usbip_names_get_class(buff, sizeof(buff),
  94                         udev->bDeviceClass,
  95                         udev->bDeviceSubClass,
  96                         udev->bDeviceProtocol);
  97         dbg("%-20s = %s", "Device(C/SC/P)", buff);
  98
  99         DBG_UDEV_INTEGER(bcdDevice);
 100
 101         usbip_names_get_product(buff, sizeof(buff),
 102                         udev->idVendor,
 103                         udev->idProduct);
 104         dbg("%-20s = %s", "Vendor/Product", buff);
 105
 106         DBG_UDEV_INTEGER(bNumConfigurations);
 107         DBG_UDEV_INTEGER(bNumInterfaces);
 108
 109         dbg("%-20s = %s", "speed",
 110                         usbip_speed_string(udev->speed));
 111
 112         DBG_UDEV_INTEGER(busnum);
 113         DBG_UDEV_INTEGER(devnum);
 114 }
 115
 116
 117 int read_attr_value(struct udev_device *dev, const char *name,
 118                     const char *format)
 119 {
 120         const char *attr;
 121         int num = 0;
 122         int ret;
 123
 124         attr = udev_device_get_sysattr_value(dev, name);
 125         if (!attr) {
 126                 err("udev_device_get_sysattr_value failed");
 127                 goto err;
 128         }
 129
 130         /* The client chooses the device configuration
 131          * when attaching it so right after being bound
 132          * to usbip-host on the server the device will
 133          * have no configuration.
 134          * Therefore, attributes such as bConfigurationValue
 135          * and bNumInterfaces will not exist and sscanf will
 136          * fail. Check for these cases and don't treat them
 137          * as errors.
 138          */
 139
 140         ret = sscanf(attr, format, &num);
 141         if (ret < 1) {
 142                 if (strcmp(name, "bConfigurationValue") &&
 143                                 strcmp(name, "bNumInterfaces")) {
 144                         err("sscanf failed for attribute %s", name);
 145                         goto err;
 146                 }
 147         }
 148
 149 err:
 150
 151         return num;
 152 }
 153
 154
 155 int read_attr_speed(struct udev_device *dev)
 156 {
 157         const char *speed;
 158
 159         speed = udev_device_get_sysattr_value(dev, "speed");
 160         if (!speed) {
 161                 err("udev_device_get_sysattr_value failed");
 162                 goto err;
 163         }
 164
 165         for (int i = 0; speed_strings[i].speed != NULL; i++) {
 166                 if (!strcmp(speed, speed_strings[i].speed))
 167                         return speed_strings[i].num;
 168         }
 169
 170 err:
 171
 172         return USB_SPEED_UNKNOWN;
 173 }
 174
 175 #define READ_ATTR(object, type, dev, name, format)                            \
 176         do {                                                                  \
 177                 (object)->name = (type) read_attr_value(dev, to_string(name), \
 178                                                         format);              \
 179         } while (0)
 180
 181
 182 int read_usb_device(struct udev_device *sdev, struct usbip_usb_device *udev)
 183 {
 184         uint32_t busnum, devnum;
 185         const char *path, *name;
 186
 187         READ_ATTR(udev, uint8_t,  sdev, bDeviceClass,           "%02x\n");
 188         READ_ATTR(udev, uint8_t,  sdev, bDeviceSubClass,        "%02x\n");
 189         READ_ATTR(udev, uint8_t,  sdev, bDeviceProtocol,        "%02x\n");
 190
 191         READ_ATTR(udev, uint16_t, sdev, idVendor,               "%04x\n");
 192         READ_ATTR(udev, uint16_t, sdev, idProduct,              "%04x\n");
 193         READ_ATTR(udev, uint16_t, sdev, bcdDevice,              "%04x\n");
 194
 195         READ_ATTR(udev, uint8_t,  sdev, bConfigurationValue,    "%02x\n");
 196         READ_ATTR(udev, uint8_t,  sdev, bNumConfigurations,     "%02x\n");
 197         READ_ATTR(udev, uint8_t,  sdev, bNumInterfaces,         "%02x\n");
 198
 199         READ_ATTR(udev, uint8_t,  sdev, devnum,                 "%d\n");
 200         udev->speed = read_attr_speed(sdev);
 201
 202         path = udev_device_get_syspath(sdev);
 203         name = udev_device_get_sysname(sdev);
 204
 205         strncpy(udev->path,  path,  SYSFS_PATH_MAX);
 206         strncpy(udev->busid, name, SYSFS_BUS_ID_SIZE);
 207
 208         sscanf(name, "%u-%u", &busnum, &devnum);
 209         udev->busnum = busnum;
 210
 211         return 0;
 212 }
 213
 214 int read_usb_interface(struct usbip_usb_device *udev, int i,
 215                        struct usbip_usb_interface *uinf)
 216 {
 217         char busid[SYSFS_BUS_ID_SIZE];
 218         struct udev_device *sif;
 219
 220         sprintf(busid, "%s:%d.%d", udev->busid, udev->bConfigurationValue, i);
 221
 222         sif = udev_device_new_from_subsystem_sysname(udev_context, "usb", busid);
 223         if (!sif) {
 224                 err("udev_device_new_from_subsystem_sysname %s failed", busid);
 225                 return -1;
 226         }
 227
 228         READ_ATTR(uinf, uint8_t,  sif, bInterfaceClass,         "%02x\n");
 229         READ_ATTR(uinf, uint8_t,  sif, bInterfaceSubClass,      "%02x\n");
 230         READ_ATTR(uinf, uint8_t,  sif, bInterfaceProtocol,      "%02x\n");
 231
 232         return 0;
 233 }
 234
 235 int usbip_names_init(char *f)
 236 {
 237         return names_init(f);
 238 }
 239
 240 void usbip_names_free(void)
 241 {
 242         names_free();
 243 }
 244
 245 void usbip_names_get_product(char *buff, size_t size, uint16_t vendor,
 246                              uint16_t product)
 247 {
 248         const char *prod, *vend;
 249
 250         prod = names_product(vendor, product);
 251         if (!prod)
 252                 prod = "unknown product";
 253
 254
 255         vend = names_vendor(vendor);
 256         if (!vend)
 257                 vend = "unknown vendor";
 258
 259         snprintf(buff, size, "%s : %s (%04x:%04x)", vend, prod, vendor, product);
 260 }
 261
 262 void usbip_names_get_class(char *buff, size_t size, uint8_t class,
 263                            uint8_t subclass, uint8_t protocol)
 264 {
 265         const char *c, *s, *p;
 266
 267         if (class == 0 && subclass == 0 && protocol == 0) {
 268                 snprintf(buff, size, "(Defined at Interface level) (%02x/%02x/%02x)", class, subclass, protocol);
 269                 return;
 270         }
 271
 272         p = names_protocol(class, subclass, protocol);
 273         if (!p)
 274                 p = "unknown protocol";
 275
 276         s = names_subclass(class, subclass);
 277         if (!s)
 278                 s = "unknown subclass";
 279
 280         c = names_class(class);
 281         if (!c)
 282                 c = "unknown class";
 283
 284         snprintf(buff, size, "%s / %s / %s (%02x/%02x/%02x)", c, s, p, class, subclass, protocol);
 285 }