• Eric W. Biederman's avatar
    sysctl: Infrastructure for per namespace sysctls · e51b6ba0
    Eric W. Biederman authored
    This patch implements the basic infrastructure for per namespace sysctls.
    
    A list of lists of sysctl headers is added, allowing each namespace to have
    it's own list of sysctl headers.
    
    Each list of sysctl headers has a lookup function to find the first
    sysctl header in the list, allowing the lists to have a per namespace
    instance.
    
    register_sysct_root is added to tell sysctl.c about additional
    lists of sysctl_headers.  As all of the users are expected to be in
    kernel no unregister function is provided.
    
    sysctl_head_next is updated to walk through the list of lists.
    
    __register_sysctl_paths is added to add a new sysctl table on
    a non-default sysctl list.
    
    The only intrusive part of this patch is propagating the information
    to decided which list of sysctls to use for sysctl_check_table.
    Signed-off-by: default avatarEric W. Biederman <ebiederm@xmission.com>
    Cc: Serge Hallyn <serue@us.ibm.com>
    Cc: Daniel Lezcano <dlezcano@fr.ibm.com>
    Cc: Cedric Le Goater <clg@fr.ibm.com>
    Cc: Pavel Emelyanov <xemul@openvz.org>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    e51b6ba0
sysctl.c 67.9 KB