diff options
Diffstat (limited to 'tools/usb/usbip/libsrc/vhci_driver.c')
| -rw-r--r-- | tools/usb/usbip/libsrc/vhci_driver.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/tools/usb/usbip/libsrc/vhci_driver.c b/tools/usb/usbip/libsrc/vhci_driver.c index 036b62be0fc7..f6f3a19ba385 100644 --- a/tools/usb/usbip/libsrc/vhci_driver.c +++ b/tools/usb/usbip/libsrc/vhci_driver.c @@ -7,6 +7,7 @@ #include <limits.h> #include <netdb.h> #include <libudev.h> +#include <dirent.h> #include "sysfs_utils.h" #undef PROGNAME @@ -134,6 +135,33 @@ static int get_nports(void) return (int)strtoul(attr_nports, NULL, 10); } +static int vhci_hcd_filter(const struct dirent *dirent) +{ + return strcmp(dirent->d_name, "vhci_hcd") >= 0; +} + +static int get_ncontrollers(void) +{ + struct dirent **namelist; + struct udev_device *platform; + int n; + + platform = udev_device_get_parent(vhci_driver->hc_device); + if (platform == NULL) + return -1; + + n = scandir(udev_device_get_syspath(platform), &namelist, vhci_hcd_filter, NULL); + if (n < 0) + err("scandir failed"); + else { + for (int i = 0; i < n; i++) + free(namelist[i]); + free(namelist); + } + + return n; +} + /* * Read the given port's record. * @@ -230,6 +258,14 @@ int usbip_vhci_driver_open(void) goto err; } + vhci_driver->ncontrollers = get_ncontrollers(); + dbg("available controllers: %d", vhci_driver->ncontrollers); + + if (vhci_driver->ncontrollers <=0) { + err("no available usb controllers"); + goto err; + } + if (refresh_imported_device_list()) goto err; |