USB: snoop processes opening usbfs device files
This patch (as1148) adds a new "snoop" message to usbfs when a device
file is opened, identifying the process responsible. This comes in
extremely handy when trying to determine which program is doing some
unwanted USB access.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c
index 7a4fa79..528befd 100644
--- a/drivers/usb/core/devio.c
+++ b/drivers/usb/core/devio.c
@@ -624,6 +624,8 @@
smp_wmb();
list_add_tail(&ps->list, &dev->filelist);
file->private_data = ps;
+ snoop(&dev->dev, "opened by process %d: %s\n", task_pid_nr(current),
+ current->comm);
out:
if (ret) {
kfree(ps);