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    net: filter: move filter accounting to filter core · fbc907f0
    Daniel Borkmann 提交于
    This patch basically does two things, i) removes the extern keyword
    from the include/linux/filter.h file to be more consistent with the
    rest of Joe's changes, and ii) moves filter accounting into the filter
    core framework.
    
    Filter accounting mainly done through sk_filter_{un,}charge() take
    care of the case when sockets are being cloned through sk_clone_lock()
    so that removal of the filter on one socket won't result in eviction
    as it's still referenced by the other.
    
    These functions actually belong to net/core/filter.c and not
    include/net/sock.h as we want to keep all that in a central place.
    It's also not in fast-path so uninlining them is fine and even allows
    us to get rd of sk_filter_release_rcu()'s EXPORT_SYMBOL and a forward
    declaration.
    
    Joint work with Alexei Starovoitov.
    Signed-off-by: NDaniel Borkmann <dborkman@redhat.com>
    Signed-off-by: NAlexei Starovoitov <ast@plumgrid.com>
    Cc: Pavel Emelyanov <xemul@parallels.com>
    Signed-off-by: NDavid S. Miller <davem@davemloft.net>
    fbc907f0
filter.h 3.9 KB