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authorYuyang Du <yuyang.du@intel.com>2017-05-22 13:20:16 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-06-13 11:48:24 +0300
commitaa3ecb9154acb99282f315fe6c34ce4b7eb4d67e (patch)
tree5a93c493993195b70cff24af1408ea816dc14771 /tools/usb
parentc3509715fc9484a48b69a9f0196b728c960840c9 (diff)
downloadlinux-aa3ecb9154acb99282f315fe6c34ce4b7eb4d67e.tar.xz
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>
Diffstat (limited to 'tools/usb')
-rw-r--r--tools/usb/usbip/libsrc/vhci_driver.c36
-rw-r--r--tools/usb/usbip/libsrc/vhci_driver.h1
2 files changed, 37 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;
diff --git a/tools/usb/usbip/libsrc/vhci_driver.h b/tools/usb/usbip/libsrc/vhci_driver.h
index fa2316cf2cac..33add142c46e 100644
--- a/tools/usb/usbip/libsrc/vhci_driver.h
+++ b/tools/usb/usbip/libsrc/vhci_driver.h
@@ -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];
};