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xtables: extend matches and targets with .usersize

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In matches and targets that define a kernel-only tail to their
xt_match and xt_target data structs, add a field .usersize that
specifies up to where data is to be shared with userspace.

Performed a search for comment "Used internally by the kernel" to find
relevant matches and targets. Manually inspected the structs to derive
a valid offsetof.

Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Willem de Bruijn 2017-01-02 17:19:46 -05:00 • committed by Pablo Neira Ayuso
commit ec23189049
14 changed files with 23 additions and 0 deletions
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