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USB: snoop processes opening usbfs device files

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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>
This commit is contained in:
Alan Stern 2008-10-06 11:24:26 -04:00 committed by Greg Kroah-Hartman
parent bb78a825fa
commit 2da41d5f6c
1 changed files with 2 additions and 0 deletions
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2
drivers/usb/core/devio.c
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@ -624,6 +624,8 @@ static int usbdev_open(struct inode *inode, struct file *file)
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);