• Daniel Borkmann's avatar
    net: filter: add jited flag to indicate jit compiled filters · f8bbbfc3
    Daniel Borkmann authored
    This patch adds a jited flag into sk_filter struct in order to indicate
    whether a filter is currently jited or not. The size of sk_filter is
    not being expanded as the 32 bit 'len' member allows upper bits to be
    reused since a filter can currently only grow as large as BPF_MAXINSNS.
    Therefore, there's enough room also for other in future needed flags to
    reuse 'len' field if necessary. The jited flag also allows for having
    alternative interpreter functions running as currently, we can only
    detect jit compiled filters by testing fp->bpf_func to not equal the
    address of sk_run_filter().
    Joint work with Alexei Starovoitov.
    Signed-off-by: default avatarAlexei Starovoitov <ast@plumgrid.com>
    Signed-off-by: default avatarDaniel Borkmann <dborkman@redhat.com>
    Cc: Pablo Neira Ayuso <pablo@netfilter.org>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>