• Tejun Heo's avatar
    netprio_cgroup: limit the maximum css->id to USHRT_MAX · 297dbde1
    Tejun Heo authored
    netprio builds per-netdev contiguous priomap array which is indexed by
    css->id.  The array is allocated using kzalloc() effectively limiting
    the maximum ID supported to some thousand range.  This patch caps the
    maximum supported css->id to USHRT_MAX which should be way above what
    is actually useable.
    
    This allows reducing sock->sk_cgrp_prioidx to u16 from u32.  The freed
    up part will be used to overload the cgroup related fields.
    sock->sk_cgrp_prioidx's position is swapped with sk_mark so that the
    two cgroup related fields are adjacent.
    Signed-off-by: default avatarTejun Heo <tj@kernel.org>
    Acked-by: default avatarDaniel Wagner <daniel.wagner@bmw-carit.de>
    Cc: Daniel Borkmann <daniel@iogearbox.net>
    CC: Neil Horman <nhorman@tuxdriver.com>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    297dbde1
netprio_cgroup.c 6.67 KB