• Eric W. Biederman's avatar
    tun: Utilize the normal socket network namespace refcounting. · 140e807d
    Eric W. Biederman authored
    There is no need for tun to do the weird network namespace refcounting.
    The existing network namespace refcounting in tfile has almost exactly
    the same lifetime.  So rewrite the code to use the struct sock network
    namespace refcounting and remove the unnecessary hand rolled network
    namespace refcounting and the unncesary tfile->net.
    
    This change allows the tun code to directly call sock_put bypassing
    sock_release and making SOCK_EXTERNALLY_ALLOCATED unnecessary.
    
    Remove the now unncessary tun_release so that if anything tries to use
    the sock_release code path the kernel will oops, and let us know about
    the bug.
    
    The macvtap code already uses it's internal socket this way.
    Signed-off-by: default avatar"Eric W. Biederman" <ebiederm@xmission.com>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    140e807d
tun.c 55.1 KB