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usb: usbip tool: Add ncontrollers in vhci_driver structure 

A new field ncontrollers is added to the vhci_driver structure.
And this field is stored by scanning the vhci_hcd* dirs in the
platform udev.

Suggested-and-reviewed-by: Krzysztof Opasiak <k.opasiak@samsung.com>
Signed-off-by: Yuyang Du <yuyang.du@intel.com>
Acked-by: Shuah Khan <shuahkh@osg.samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Yuyang Du 2017-05-22 18:20:16 +08:00 committed by Greg Kroah-Hartman
parent c3509715fc
commit aa3ecb9154
2 changed files with 37 additions and 0 deletions
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36
tools/usb/usbip/libsrc/vhci_driver.c
View File

@ -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;

1
tools/usb/usbip/libsrc/vhci_driver.h
View File

@ -31,6 +31,7 @@ struct usbip_vhci_driver {
/* /sys/devices/platform/vhci_hcd */
struct udev_device *hc_device;
int ncontrollers;
int nports;
struct usbip_imported_device idev[MAXNPORT];
};